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Top freelance Haskell developers available to hire
I have over 5 years of professional tutoring experience (and 1000+ positive reviews on Chegg tutors before they closed). I have worked with students of all levels of experience, from high school to grad school. I'm an expert on C, C++, Python, Java, functional programming languages such as OCaml, Haskell, F#, Prolog, Scheme/Lisp/Racket, etc. I can help with CS topics such as algorithms and data structures, Computer Graphics, Cryptography, Compilers, Programming Paradigms, CS theory (Finite Automata, Regular Expressions, Context Free Grammars, Turing Machines, NP completeness, etc.). I'm also happy to help with other math, such as Calculus, Discrete math, Statistics, Number Theory. If you want help with something other than what I've listed above I can usually debug anything, but I might be learning the material along with you.
Graduated in Business Informatics BSc in Tirana, Albania and Computer Science MSc from top-ranked Saarland University in Germany, I have been working from 7 years in industry and startup projects.
My primary specialties are Javascript, Node.Js, PostgreSQL, Mongo, RabbitMQ, ELK Stack, Angular and React, but also Vue.Js. Also certified in C# ASP.NET, MSSQL and .NETCore with 3 years of experience there. I have hands-on experience in most of JS frameworks because it is a language I feel comfortable working in. This means that I can offer my expertise on topics related to front and back end, complex software architectures, microservices, single-page apps, websites, mobile applications and more.
With 6.5 years of experience in web and software development, I am very familiar with SCRUM methodology and AGILE philosophy of organising development sprints. I have also managed teams of 3-5 people in previous projects. I value code quality, testing and performance reviews as crucial building blocks of a successsful software.
I enjoy working within teams and helping/teaching others on matters that I feel very confident in, so I am willing to take my time to help teammates have an easy and fun path towards learning and progressing in their day to day work.
For more information about my experiences, please check my profile. I am looking forward to get in touch with you and to determine how I can be a valuable asset to your next projet.
Superb C++, Haskell, Scala, FP, and OO design chops.
Expert at designing compilers, type systems, frameworks, and embedded programming languages.
Strong background in pure mathematics, computer science, functional programming, and category theory.
# š Hi, Iām DamiĆ”n
**Senior Software Engineer** with 10+ years turning ideas into _real, working code_ ā using **Kotlin**, **Java**, **Python**, **Haskell**, **JavaScript**, and **SQL**.
---
### š But hereās what really matters:
I know how overwhelming programming can feel ā
and Iām *really* good at making it make sense.
Whether you're:
- A **beginner** who thinks `if` statements are witchcraft,
- In **university or bootcamp** and your code feels like a tragic love story,
- Or a **pro** getting roasted by a bug that mocks your debugger ā
**Iām here to help.**
---
## š§ How I Can Help
### **š Starting from zero?**
- Learn **Python, Java, Kotlin, or Haskell** ā no overwhelm, no nonsense.
- Understand **core concepts**: variables, loops, functions ā *and why they matter*.
- Build **real projects**, not just toy examples.
- Stop copy-pasting code you donāt understand ā Iāll help you _actually get it_.
---
### **š In school or bootcamp?**
- Tackle **assignments** with clear explanations ā not just magic answers.
- Design class hierarchies that *actually make sense*.
- Debug weird, soul-crushing errors.
- Start **thinking like a developer**, not just surviving syntax.
---
### **š¼ Already coding professionally?**
- Write **meaningful tests** (JUnit, Mockito, pytest ā no excuses).
- Migrate from **Java ā Kotlin** or **OOP ā FP** ā _without the pain_.
- Work confidently with **Spring Boot, GraphQL, PostgreSQL, MySQL**.
- Refactor legacy code for **clarity, speed, and sanity**.
- Finally grasp **functional programming** ā yes, *even monads* (no PhD needed).
---
## šÆ My Teaching Style
- **No ego, no jargon** ā Ask anything. Iāll meet you where you are.
- **"Why" over "what"** ā Iāll help you _understand_, not just repeat.
- **Adaptable & fun** ā If cat memes help you learn, Iāll bring the cats. š±
---
## ā Bottom line?
Whether youāre stuck, starting out, or leveling up ā
**weāll make progress, one clear concept at a time.**
I'm Matei, a full-stack developer with over 10 years of experience, specializing in JavaScript, React, and Node.js. I help developers at all levels overcome challenges, from debugging complex issues to understanding core concepts. My approach is patient and tailored to your needs, ensuring you gain confidence and clarity in your coding journey.
Format:
- regular (long term) or one-time
- for any level (beginner/intermediate/advanced)
- 45-90min sessions, up to 6hrs on request
- personalized take-home tasks & resources
Availability:
- until Jul 15: 4:00-6:00, 15:00-18:00 UTC
- after Jul 15: 4:00-18:00 UTC
- last minute or late night sessions on request (email matei@copot.eu)
Technologies:
- JavaScript: ESNext, NodeJS/Deno, TypeScript, React, Vue, NodeMCU, & more
- Front-end Web Dev: HTML5, CSS3, responsive design, PWAs, SPAs, & more
- Back-end Web Dev: Express/NextJS APIs, Python, AWS, Docker, SQL, PHP, & more
- App Dev: Mac/Linux & Android, Electron, Expo, Python, Stripe, UX, & more
- others: always curious about other technologies, e.g. haskell, ruby, WASM, WebGL...
= Why me?
I'm typically paid ā¬100/hr by top companies, so the lower rate here means you're getting top-tier expertise at an accessible price. I enjoy mentoring because it brings variety and a more collaborative and relaxed dynamic.
I have a proven track record of guiding learners from zero experience to landing high-paying jobs. My teaching adapts to your pace and goals ā you'll always get honest, actionable advice, including whatās realistic and whatās not.
If you're serious about growing your skills or career in tech, Iād be glad to support your journey.
Personally I am passionate about programming languages in general, enjoying clear understanding about the way they work. I can help you to learn programming languages, including unconventional ones, like Lisp, Erlang, Prolog, Haskell or Scheme.
I also can help you with academic topics such as Lambda Calculus, Finite Automata (Finite State Machine), Push-Down Automata, Finite State Transducers and others.
I enjoy explaining complicated things in a simple way.
My past production experience mostly comprises from three things:
- backend development with Ruby on Rails on various small and average-size projects
- work on Flussonic video streaming server at Erlyvideo company using Erlang
- frontend development using React, JavaScript
and also a wide range of other languages and technologies.
IMPORTANT: If you want to contact me, and your timezone is significantly different, feel free to just open a session request during my timezone evenings (after 8pm till midnight). I've noticed that figuring out the request details via chat is extremely cumbersome.
I'm a professional developer working on Application Performance Management in Dynatrace; currently stationed in Gdynia, Poland.
I've done a number of jobs in the past, including Graphics Driver development at Intel, Game Development at Huuuge Games and other, potentially unrelated things.
I've started programming wanting to be a game developer, so there's a huge chance I can help you with your C++ game project. I also know my ways around the low-level parts of C and C++.
Right now my main focus at work is Node.js, so if you have some questions about that, ask away. I also did a fair share of weird front-end experiments, so Three.js, WebGL and stuff like WebWorkers don't scare me.
And finally, if you need some tips about Haskell or functional programming in general, that's my personal hobby area.
In general, don't hesitate to ask, as I always try to get the feeling for your problem so that we both end up satisfied!
I am an experienced web and mobile application developer with more than 4 years experience with client projects. I have participated in developing quality grade software for varying range of clients. I have keen interest in problem solving and software debugging. I also managed a software development team to deliver client software for a few projects. I am a lover of good code and standard software development practices (TDD, SOLID, etc).
I'm a Staff Software Engineer at Instacart (Previously Microsoft and Blablacar), I'm an experienced Java and mobile developer with 8+ years professional experience, primarily in Java and Android development and I also have experience writing backend applications with Clojure and a little bit of Haskell.
My Work on Github : https://github.com/chemouna
My specialties are creating mobile application, debugging, software design, refactoring legacy code, creating unit and functional tests, automating builds and deployments specially for mobile apps.
I am a professional engineer with a master's degree in Computer Engineering.
I love functional programming whether with Haskell or Clojure and also have a lot of experience developing Android apps.
I'm a software engineer with few years of professional experience at top tech companies like Google and Facebook, interested in algorithmic solutions to our daily problems and in creating large scalable systems.
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Frequently asked questions
How long do Haskell projects normally take?
The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Haskell project request on Codementor, youāll have the option to indicate when youād expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Haskell request on Codementor, check out our article.
How much does it cost to hire a freelance Haskell developer?
We donāt charge anything when you post a freelance hiring request for Haskell developers! Youāll have the chance to determine what the budget for your project is when you post the request. Youāll only need to pay the developer if youāre 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.
What makes Codementor Haskell developers different?
We do a comprehensive technical and communications screen of all Haskell developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Haskell developersā user satisfaction rates.
What happens if Iām not happy with the freelancerās work?
As a platform, we strive to ensure youāre always happy with your Haskell projectās results. If youāre unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.
For more answers to frequently asked questions, see here.