Hi! I can help you with your lexer and parser since I have programming languages background from "Compilers: Principles, Techniques, and Tools" aka "The dragon book"
Relevant Skills and Experience
I've written a compiler for a language I designed (it's written in Haskell language with Alex and Happy as lexer and parser) and a interpreter in Ruby with regex from language and Racc as parser.
Proposed Milestones
$20 USD - Lexing
$20 USD - Parsing
$15 USD - Documentation, fixes, project ending