Work similar word gamesmunkák

Szűrő

Legutóbbi kereséseim
Szűrés erre:
Költségvetés
eddig:
eddig:
eddig:
Típus
Készségek
Nyelvek
    Munka státusza
    2,000 work similar word games munka, árazás ebben: EUR

    I'm looking for a talented Telegram Bot Developer to work on an existing project. This bot is already fully functional and being used by clients but it needs further updates/improvements. This is an ongoing project so you will get future work. the existing developer is currently not available so I will need you to pick up where he left off. You need to be highly skilled in this area of work. Do not bid if you only think you can do it I need excellent results. You can view info about my bot here Summary about the bot It allows people to link a panel to the bot, this panel offers a subscription service for their customers and the bot automates everything for the users. The bot currently works with PayPal and Stripe. The bot has 3 different types of users

    €363 (Avg Bid)
    €363 licitátlag
    39 árajánlat

    I'm on the hunt for a seasoned web3 artist to construct 20 realistic, non-...a futuristic theme. Essentially, the tone should lean towards being colorful and vibrant while still maintaining the realistic look. -The perfect candidate will need: - Extensive knowledge or a strong interest in futuristic themes - Experience creating vibrant and colorful assets in a realistic style - Understanding of Web3 design principles - Previous experience creating art assets for video games Please, only apply if you possess a portfolio showcasing your skills in this aspect, as it's crucial to the success of this project. Your creativity will play a significant role in setting the game's overall visual appeal. I can't wait to see your imaginative interpretations of a colorful, ...

    €93 (Avg Bid)
    €93 licitátlag
    53 árajánlat
    SEO work -- 2 Véget ért left

    looking for seo for my website thanks

    €184 (Avg Bid)
    €184 licitátlag
    1 árajánlat

    I am in need of an expert Word VBA programmer to: - Develop custom macros for Word documents - Make these macros capable of converting Word files (.docx) to PDF, and vice versa (this PDF file -> .docx) using the (PDF to WORD Converter) website. The ideal freelancer for this project will: - Have in-depth knowledge and experience in Word VBA programming and macro development - Be familiar with file conversion resources such as - Be capable of thoroughly testing the macro to ensure it functions correctly, specifically for document conversion. The goal of this project is not only to automate document conversion, but also to enhance workflow efficiency. If you are keen on taking part in this project, kindly send in your bids.

    €120 (Avg Bid)
    €120 licitátlag
    20 árajánlat

    A production quality, enterprise global gift card system. Powered by a form that is easy to connect to by domain, that has a form builder attached to the PlayFab backend powering our one big game(a big grand exchange of gift cards). The comp...builder attached to the PlayFab backend powering our one big game(a big grand exchange of gift cards). The company signs up, uploads product photos and their logo then gets an automated storefront form created with their own items ready for sale to customers and to play in mini games. They then sign up their domain with us through Amazon Ses to have automated email sending through the form. It's basically an email newsletter collector form that runs as a game via the PlayFab backend. Deployed on AWS/Azure/GCP, any of the 3 work wit...

    €399 (Avg Bid)
    €399 licitátlag
    29 árajánlat

    ...The issues started over a year ago and prevents me from login into the game, while also causing it to consistently freeze at the loading screen. Despite trying to reinstall the game, the problem still persists. All other games installed on my system operate without any issues. SKILLS & EXPERIENCE NEEDED: - Excellent knowledge and understanding of common game issues and their solutions - Prior experience in troubleshooting and fixing issues specifically with Valorant would be highly desirable - Strong high-level analytical skills and problem-solving abilities - Able to work with me to diagnose and solve the issue Your role will be to diagnose the problem, suggest possible solutions, and guide me through the process of implementing these solutions. Payments will be ma...

    €6 (Avg Bid)
    €6 licitátlag
    3 árajánlat

    ...thereby immersing the player in an authentic goalkeeping experience. This development will be strictly for Android devices. Expertise in developing gaming apps within the Android framework is a must. Key Requirements: - Experience in Unity3D and C# programming - Knowledge of VR, particularly Google Cardboard - Prior experience in creating interactive and dynamic games - Prior experience in developing First-person perspective games Your role as a developer will be to conceptualize and implement goalkeeping mechanics, create a user-friendly interface, and ensure smooth gameplay on Android devices using the Unity C# programming. With the right expertise and creativity, this project can be an exciting and engaging endeavor. If you have a passion for football and game deve...

    €101 (Avg Bid)
    €101 licitátlag
    42 árajánlat

    I'm seeking highly skilled developers to create real-money earning games on both Android and iOS games in question are Ludo and Cricket. Key Features: - Player Matchmaking: The game should match players of similar skill level. - Real-time Multiplayer: It's crucial for players to compete in real-time. - Earning Real Money: Players should be able to earn real money by winning matches and completing in-game challenges. Ludo King Cricket League I want the above games graphics as it is in a single app. But there will be a change in gameplay. where users play with real money and win real money. Ludo has 3 types a. Single Token ( for fast game finishing)

    €1598 (Avg Bid)
    €1598 licitátlag
    44 árajánlat

    I am seeking an intermediate level Unity Developer with a particular interest and experience i...intermediate level Unity Developer with a particular interest and experience in developing adventure games for mobile platforms. Key responsibilities include: - Developing an adventure game on a mobile platform using Unity - Collaborating closely with me to ensure the game meets its design goals - Regular testing and debugging to ensure the game runs smoothly. You should have: - Intermediate knowledge of Unity development, specifically for mobile platforms - Previous experience in creating adventure games - An innovative mindset coupled with problem-solving skills - Strong coding and debugging skills. Apply if you have a passion for game development and making engaging mobile...

    €368 / hr (Avg Bid)
    €368 / hr licitátlag
    27 árajánlat

    I'm in need of a skilled VBA coder to help enhance the functionality of Microsoft Word. The specific functionalities required are: - Document automation - Text formatting and styling - Data extraction from documents The Word document essentially consists of tables. The tables have different numbers of rows and two columns. The first column should only contain text. There should be a checkbox in the second column. The checkboxes should initially be hidden. The checkboxes should only become visible when you activate the “Show all” function. If the check box is selected, the text in column 1 should have a specific target style assigned to it. If the check box is cleared, the text should be mapped to another style that is defined to have the text hidden. ...

    €15 (Avg Bid)
    €15 licitátlag
    15 árajánlat

    ... Racing, Role-playing, RPG, Indie and Simulation games. • Each article should be 500 words, without using artificial intelligence tools. I need Only Human research articles. Remember I will not accept any AI content. or any touch of AI during the writing. • Total 30 articles. Key responsibilities: - Proper Research. - Accurate Information. - Provide Helpful Information. - Informatic High-Quality Article. - No Grammatical errors. - Plagiarism Free - AI Free - You can't use any AI tools and Paraphrasing Tools. The ideal candidate should have: • A strong command of the English language. - Excellent English grammar knowledge - Ability to write engaging and clear content about complex subjects. • A deep knowledge in the field of PC games particu...

    €71 (Avg Bid)
    €71 licitátlag
    41 árajánlat

    Seeking enthusiastic beginner-level YouTube video editor for freelance position. Edit raw footage, add graphics, transitions, and effects. Prior experience preferred but not required. Join a supportive team dedicated to creating compelling content. Opportunity for growth and flexibility. If interested, apply now! - Editing raw gam...Opportunity for growth and flexibility. If interested, apply now! - Editing raw gaming footage into lively, engaging content. - Incorporating a variety of fast-paced editing techniques to keep viewers hooked. - Providing a fresh take on gaming video editing, even as a beginner. Key skills and experiences: - Basic understanding of video editing software - Passionate about video games and familiar with gaming culture - Ability to work with quick ...

    €2 / hr (Avg Bid)
    €2 / hr licitátlag
    24 árajánlat

    I want a SEO or SEM company to work on my Google My business page which includes testimonials and reviews.. Only Companies with proven track record can contact us.

    €521 (Avg Bid)
    €521 licitátlag
    68 árajánlat

    ...design should include the storage space of the board games in the cafe, such as in-wall shelves for example. - The design should also factor in that the cafe is in a mall with glass walls, so it should take sunlight into account when envisioning the ambience/lighting. Skills and Experience: - Prior experience in cafe/lounge or restaurant interior design is a plus. - Exceptional skills in 3D and 2D model rendering. - Proficient in design software like CAD, SketchUp or similar. - A strong understanding of lighting, materials selection and space planning. This project is not just about creating a physical setup but about transforming a space to resonate with the board game and coffee enthusiasts alike. If you love cafes and board games as much as you do interi...

    €449 (Avg Bid)
    €449 licitátlag
    45 árajánlat

    see attachment for the work and its not more than few hrs work, if you know the Project Management cash flow working based on GANTT CHART needed work on Project Management software including cash flows and GANT CHART, The ideal candidate should be experienced in: - Resource allocation and progress tracking: Implement a system to efficiently assign resources and keep track of project evolution. - Cash Flow Management: This involves enabling manual entry of income and expenses, seamless integration with accounting software, and capability to generate financial reports. - Gantt Chart Design: The Gantt chart should capture project timelines at a milestone level, providing a high-level view of project progression. This role requires strong attention to detail, profici...

    €6 / hr (Avg Bid)
    €6 / hr licitátlag
    8 árajánlat

    NOTE: CAPCUT USERS ONLY! NOTE: If you are not very fluent in English, please DO NOT apply to this job. I have Urgent Work, so I need someone that can comprehend my instruction. And explain things to me. Looking for someone available to work until completion! I have a 9:16 video that is a recap video of one of my events. The video includes me speaking and B Roll some an event. I am looking for someone that can create different versions of the video: -Put some different clips in the B Roll -Try different B Roll placement within video -Try some different shots on the speakers. Zoom In & Zoom out shots. If you can think of some ways to make the video better that would be helpful. Want to figure out how we can make the video better.

    €12 / hr (Avg Bid)
    €12 / hr licitátlag
    26 árajánlat

    I urgently require a developer to build a daily fantasy sports website, focusing on cricket, within a 24-hour timeframe. This website should incorporate user registration and a login system. Key features: - Support for cricket: Although the platform doesn't need to support real-time scoring or match updates, it must cater exclusively to cricket fantasy games. - User profiles: These should include game history and statistics for each registered user. Ideal freelancer skill set: - Experience in creating sports-related websites, specifically dealing with fantasy gaming. - Quick turn-around time without compromising on the quality and functionality of the website. - Familiarity with cricket. - Ability to implement user registration and login systems effectively.

    €315 (Avg Bid)
    €315 licitátlag
    30 árajánlat

    Monthly seo and gmb work 250 backlinks with weekly reports

    €161 (Avg Bid)
    €161 licitátlag
    1 árajánlat

    I'm seeking a skilled game developer to create an immersive, horrifying VR haunted house game. Set within a realistic, haunted house environment, the game should capitalise on the potential of VR to generate intense fear and build tension. This is a multiplayer game intended to foster...must emanate intense realism to fully immerse players in the experience - Equipped with a chilling audio, the game should invoke fear among players Ideal freelancer for this project should: - Have profound experience with VR headset game development - Have an understanding and experience of developing 6DoF games - Showcase expertise in crafting highly realistic visuals - Have a knack for creating intense, fear-inducing game mechanics - Have experience in developing multiplayer games acr...

    €2664 (Avg Bid)
    €2664 licitátlag
    6 árajánlat
    Gaming Video editor Véget ért left

    Gaming Video Editor Needed for Montage Videos - I am looking for a skilled video editor to create montage videos for my gaming channel. - I am open to any game or genre, so the editor should be familiar with a wide range of games. - The videos should be engaging and exciting, capturing the best moments from my gameplay. - I would like animations to be added to the videos to enhance the visual experience. - The ideal candidate should have experience in editing gaming videos and be proficient in video editing software. - Attention to detail and the ability to meet deadlines are essential for this project.

    €6 (Avg Bid)
    €6 licitátlag
    21 árajánlat
    Graphic Design Work Véget ért left

    Hi Qaiser A., I will send details of the project to your IM.

    €230 (Avg Bid)
    €230 licitátlag
    1 árajánlat

    I have ongoing work related to our previous project 'Sophisticated Beauty Logo Design'

    €14 / hr (Avg Bid)
    €14 / hr licitátlag
    1 árajánlat

    I'm looking for a skilled Android developer to build a puzzle game within an engaging narrative. The game will be created using the Android Studio. It should be designed for mobiles with optimizing performance in mind. Key Features: * The main purpose of the game is to complete a... Key Features: * The main purpose of the game is to complete a story by solving puzzles. * The game needs to include interactive levels that add depth and engagement to the narrative. Ideal skills for this project: * Expertise in Android Studio * Proficiency in creating puzzle games * Strong understanding of interactive game level design * Experience in narrative-driven game development The successful completion of this project could lead to ongoing work for updates, expansions, and p...

    €18 (Avg Bid)
    €18 licitátlag
    27 árajánlat

    I have ongoing work related to our previous project 'Book cover Designers Wanted! Creative & Unique cover design for a non-fiction book in the Aviation Niche.'

    €23 / hr (Avg Bid)
    €23 / hr licitátlag
    1 árajánlat

    I'm seeking a skilled game developer to create a Role-Playing Game (RPG), targeted for PC and consoles (PlayStation, Xbox). The game should emphasi...expecting distinct, fully fleshed-out characters and an engaging storyline. Prior experience in writing or developing robust storylines would be highly useful. Ideal Skills: - Strong knowledge or experience in PC and console game development - Proven ability in the creation of RPG games - Ability to create engaging characters and compelling storylines - Proficiency with game development software and scripting languages Your expertise and creative vision are crucial to bring this RPG to life. Share your best work on RPGs, particularly those with a strong story and character development. Your bid should reflect your underst...

    €2311 (Avg Bid)
    €2311 licitátlag
    64 árajánlat

    Swedish Voice recording using a smartphone or Computer *Only one word *Please contact us for more details

    €15 (Avg Bid)
    €15 licitátlag
    13 árajánlat

    7 websites work per the details shared

    €460 (Avg Bid)
    €460 licitátlag
    1 árajánlat

    I have ongoing work related to our previous project 'Monochrome Logo for Learning Center'

    €9 - €9 / hr
    €9 - €9 / hr
    0 árajánlat

    I am searching for an experienced Angular developer to join my project on an urgent basis. Your key responsibilities will include: - Front-end development: You'll be developing the frontend according to the existing design. - Back-end integration: Your role will also involve integrating the front-end with our back-end services. Your expertise should also lie in debugging, as bug fixing will be part of your job. It's not yet determined if there will be a need to improve the existing code or add new features to it. Ideal candidates will have: - proficient knowledge of Angular - previous experience in both frontend and backend integration - problem-solving skills particularly in resolving bugs Please do not apply if you are unable to join urgently as time is a critical compo...

    €25 / hr (Avg Bid)
    €25 / hr licitátlag
    48 árajánlat

    Wanted Online Internet job workers. Job is only through Internet. Work from home part time jobs. You can earn Rs.750-2000/- daily. These are genuine Data entry jobs & Internet jobs. No Investment required Online Captcha Typing Jobs Without Investment

    €10 / hr (Avg Bid)
    €10 / hr licitátlag
    80 árajánlat

    I am seeking an expert specializing in CrowdStrike Identity Protection (IDP) and Ping federate, able to carry out comprehensive task that includes: 1. **User Access Management Improvement:** - Simplify the user provisioning process: The current method is tedious and may be prone to error; a simplified solution is required. - Enhance user authentication methods: I need a robust solution to improve user authentication. - Implement role-based access control: A system that assigns permissions based on roles in the organization. 2. **System Configuration:** - Update server settings: My project requires a professional to adjust server settings for optimal performance. - Configure single sign-on (SSO): Requires an expert to set up a single sign-on system for seamless login. - ...

    €50 (Avg Bid)
    €50 licitátlag
    7 árajánlat

    Looking content write for longterm write content for SEO

    €2 / hr (Avg Bid)
    €2 / hr licitátlag
    8 árajánlat

    I am searching for a talented and experienced mobile game developer to help bring my game idea to ...both iOS and Android development is crucial to make sure the final product is compatible and optimized for both platforms. - In-app Purchases: As for in-app purchases, currently that's undecided. However, being adaptable and open to including this feature in future iterations would be a plus. Ideal Skills: - Proficient in mobile game development (iOS & Android) - Experience in developing mobile games - Understanding of potential for in-app purchases Please provide samples of previous mobile game projects you've worked on when applying. Those with proven track records in action/adventure game development will be given preference. Looking forward to bringing this game...

    €440 (Avg Bid)
    €440 licitátlag
    1 árajánlat

    I'm looking for a skilled developer to build a cartoonish-styled adventure gaming app exclusively for the Android platform. Key Requirements: - Proficiency in Android app development, particularly in games - Experience in developing adventure games is a plus - Strong skills in creating cartoonish style graphics and animation is crucial Your role will be to design, develop, and deliver this adventure game from start to finish. We expect a visually-appealing cartoonish aesthetic that appeals to gamers seeking an element of fun and whimsy. Please provide samples of similar projects you've completed for consideration.

    €736 (Avg Bid)
    €736 licitátlag
    24 árajánlat

    ...online. Looking forward to discovering our visual communication hero. For CONTEST there are a few components - 1. Our background colour code is #FF6600 - different ball donuts (no holes in the donuts) used as the border - frappes, toasties, croissants, black coffee (coffee shop items) in the middle with a large SEXIE COFFIE logo. - JPEG image at 1920 x 1080 px (logo versions added) 2. create similar but better versions of the coffee cup formats (using same template for supplies) - 8oz - 12oz - 16oz...

    €14 (Avg Bid)
    €14 licitátlag
    67 árajánlat

    ...Racing, Role-playing, RPG, Indie and Simulation games. • Each article should be 500 words, without using artificial intelligence tools. I need Only Human research articles. Remember I will not accept any AI content. or any touch of AI during the writing. • Total 30 articles. Key responsibilities: - Proper Research. - Accurate Information. - Informatic High-Quality Article. - No Grammatical errors. - Plagiarism Free - AI Free - You can't use any AI tools, Paraphrasing Tools, or Rewrite someone's articles. The ideal candidate should have: • A strong command of the English language. - Excellent English grammar knowledge - Ability to write engaging and clear content about complex subjects. • A deep knowledge in the field of PC games ...

    €88 (Avg Bid)
    €88 licitátlag
    35 árajánlat

    ...online. Looking forward to discovering our visual communication hero. For CONTEST there are a few components - 1. Our background colour code is #FF6600 - different ball donuts (no holes in the donuts) used as the border - frappes, toasties, croissants, black coffee (coffee shop items) in the middle with a large SEXIE COFFIE logo. - JPEG image at 1920 x 1080 px (logo versions added) 2. create similar but better versions of the coffee cup formats (using same template for supplies) - 8oz - 12oz - 16oz...

    €6 (Avg Bid)
    Garantált
    €6
    5 pályamű

    Se busca presupuesto para maquetar un libro, posibilidad de nuevos contratos de maquetación. Solo profesionales de habla hispana por favor, dado que el libro es en español.

    €113 (Avg Bid)
    €113 licitátlag
    14 árajánlat

    You will extract pages from large PDF and make smaller ones, then name them and save to a folder. You will get an Excel with URL and page numbers in a PDF to extract. These are financial documents and you will be getting the presentations out of them. You have to: - Have Acrobat pro etc to edit PDFs - Experience doing accurate work by following an Excel sheet with to dos. Flexible hours and no crazy deadlines. You have to be 100% perfect though.

    €6 / hr (Avg Bid)
    €6 / hr licitátlag
    288 árajánlat

    Mình cần xây dựng code hoặc tool có thể tích hợp vào python để chuyển đổi file văn bản từ latex sang word (.docx) mà vẫn giữ nguyên định dạng, có thể chuyển trực tiếp từ latex sang word hoặc chuyển gián tiếp từ pdf sang word cũng được.

    €143 (Avg Bid)
    €143 licitátlag
    3 árajánlat

    I'm seeking an experienced app developer who can create for me a comprehensive preschool management app. This application should offer several crucial functionalities: - Interactive learning games for a fun, engaging learning environment. - Progress tracking to monitor and document the developmental milestones of each child. - Robust parent communication tools such as announcements, feedback, and meetings schedules and updates. - Attendance tracking with sign-in and sign-out features. - Photo activities posting - enabling staff to share snapshots of daily activities with parents. - A student list complete with contact information. - Staff leave application functionality. - Portfolio and checklist capability. - Survey and feedback tools to facilitate regular communication with...

    €384 (Avg Bid)
    €384 licitátlag
    243 árajánlat

    ...Extensive game design and development experience, specifically in simulator games - Familiarity with mobile game development - Ability to create captivating and engaging gameplay for both casual gamers and simulation enthusiasts The game should have the following features: - Air traffic control management: Players should be able to manage air traffic to maintain a smooth operation on the runway. - Terminal and gate management: The ability to manage terminal and gate schedules is another important aspect of the game. - Passenger and baggage handling: Players should be responsible for ensuring the safe and efficient handling of passengers and their baggage. If you have a passion for creating immersive simulation games and possess the necessary skills, kindly apply with a p...

    €911 (Avg Bid)
    €911 licitátlag
    18 árajánlat

    I need an expert video recorder to capture gameplay videos from mobile games, with a requirement of 2 to 3 videos per week. The gameplay videos will be shared across various social media platforms - specifically Instagram, YouTube, and TikTok. You will gain access to the social media accounts and you will need to post them with description and accurate hashtags. Skills needed: - Understand and experience in recording gameplay videos, mobile games. - Familiarity with Instagram, YouTube, and TikTok's video interfaces. - Timely delivery of video content – 2 to 3 videos per week. -Posting on Social Media Platforms with description and hashtags -Video Editing We need a constant collaboration. You would need to capture compelling gameplay moments, ensuring high-qualit...

    €22 / hr (Avg Bid)
    Kiemelt
    €22 / hr licitátlag
    36 árajánlat

    As a passionate game developer, I'm looking to build a comprehensive gaming platform targeted at children. This should include: - A variety of game genres such as casual games, role-playing games, and action games. Your creativity will be a huge asset as we brainstorm a blend of popular and unique game ideas. - Social interaction features including a chat room, games leaderboard, and friends list which can be toggled on/off by parents for safety purposes. Experience in developing child-friendly content is a bonus. Ideal skills for this project will include proficiency in coding for game development, an understanding of child psychology or experience with creating children-oriented digital content, and a knack for creating safe, online social interactions.

    €354 (Avg Bid)
    €354 licitátlag
    12 árajánlat

    I'm in need of a talented designer for regular work on advertising posters. I have a style guide that you should follow to maintain the brand consistency of my company. Key requirements: • Expertise in creating attractive and effective advertising posters • Ability to follow a preset company style guide • Deliver final design files in JPEG format Experience in market-oriented design will be highly appreciated. Looking forward to a long-term working relationship with quality output.

    €207 (Avg Bid)
    €207 licitátlag
    71 árajánlat

    I'm seeking a skilled web3 developer to construct an informational website for me. This project will require experiencing in building and managing dApps, particularly in the realms of finance, decentralized marketplaces, and games. The website will need to be capable of integrating with the Metamask wallet, allowing for seamless interaction with these dApps. Key tasks will include: - Developing a user-friendly informational website - Integrating a variety of dApps from different sectors - Ensuring Metamask wallet compatibility The ideal candidate has a background in web3 technology with proven experience in dApp integration and Metamask connectivity. A flexible approach to the project is required, as I anticipate future changes and additions to the site. Looking forward to y...

    €133 (Avg Bid)
    €133 licitátlag
    92 árajánlat

    I have ongoing work related to our previous project 'PLA Plastic Prototyping with 3D Print'

    €5 / hr (Avg Bid)
    €5 / hr licitátlag
    1 árajánlat

    ...players' scores and updating of leaderboards. - Team creation: Users should be able to form teams and register as a team for tournaments. - Admin backend: Reliable admin backend functionality is vital to supervise match schedules, monitor progress and control user conduct. - Tournament Formats: The site needs to support various tournament formats, including single elimination and round robin games, compared to major esports sites. Something close to the capabilities of the below website. User Side 1. Account Management • Sign-up/Login: Secure authentication (email/password or OAuth). • Profile Management: Edit profile details, view tournament participation history. 2. Tournament Interaction • Browse/Search Tournaments: View available tournaments...

    €1457 (Avg Bid)
    Titkos
    €1457 licitátlag
    139 árajánlat

    I'm in need of a proficient developer who can build a conversion app from scratch. The app should be designed to convert images and PDFs into editable Word documents, maintaining a high translation standard. Key requirements: - The app must be Windows compatible. - It should support the conversion of text in multiple languages - It does not need to save the converted documents in the cloud. Ideal skill set: - Experience in developing similar conversion tools. - Strong knowledge of programming for Windows apps. - Understanding of multiple language conversion algorithms. - Capable of delivering high-quality results with a quick turnaround time.

    €17 (Avg Bid)
    €17 licitátlag
    8 árajánlat