Hire Top Freelance Functional Programming Developers

Kirill Erokhin

I am a senior full-stack & DevOps developer with a track record of maintaining distributed infrastructure, recent deep experience in large-scale data pipelines and a growing skillset and interest in applied AI/LLM integration. My recent work at an e-commerce search engine startup had me building and maintaining scrapers and a data pipeline that ingested over 10M product SKUs into an OpenSearch index, which was used for hybrid vector+lexical product search, enriched with LLM signals extracted as part of the pipeline. I've used reranking techniques like RRF to enhance relevance after retrieval, and RAG/grounding for features that answered personalized user queries with recommendations grounded in real customer reviews. My earlier work was heavily full-stack and always involved infrastructure where I often built and supported systems end-to-end, very often in context of a regulated market - with great examples like Deckard (PropTech/GovTech), Sick Children's Hospital/RareConnect (Healthcare-adjacent), and Ethoca \[now MasterCard\] (FinTech). I've also led IaC initiatives at Ethoca (Chef/Ansible, in 2016-17), and even implemented IaC from scratch for two startups - Pastel Labs (Terraform automation of AWS infrastructure for a B2B SaaS and a tutoring marketplace, in 2021), and Rilara (Pulumi for AWS infrastructure of their e-commerce product, in 2025-26). My startup experience is proven track record of working independently, but I also thrive as part of a team, with most recent example of being part of Deckard's distributed remote engineering team of 25+ people spread across the US and Australian timezones. Claude Code is part of my everyday workflow, and I am happy to consider myself a relatively-older senior developer who has successfully adapted to an AI-assisted/AI-first SDLC without compromising the quality of my work. I would be very excited to continue my journey with an opportunity in healthcare or finance, where I could apply my IaC skills while continuing to explore the world of LLM applications to improve user experience in these regulated environments. Should you have any questions about any of the background I mentioned here or on the attached resume, I would be glad to answer them in an interview at a time of your convenience. Thank you!

Federico Agustin Sawady O'Connor

Software Engineer and University Professor (Functional Programming and Data Structures). Co-author of two books, based on research of computer science didactics. I like to apply multiple programming paradigms and solid academic theory, in the field of services and web applications, software architecture, programming language design, as well as in the analysis of large-scale projects.

Mr. Rizwan

Hi! I'm Experienced Full-Stack Web Developer (Angular, React, Javascript, NodeJs), Use my powers to turn your dreams into reality. I learned to program making websites from scratch with HTML, CSS, Javascript, React, Redux, Angular, NodeJs, Express and MongoDB. MERN stack (MongoDB, Express, ReactJS, and NodeJS). MEAN stack (MongoDB, Express, AngularJs, and NodeJS). Wordpress (Custom Themes, Modifications, Performance... ) This means that you can ask me for help on anything related to Javascript, HTML, CSS (and SCSS/Sass of course), responsive/mobile websites, usability an so on. With 9 years of experience developing software, I always advocate for the best available solutions and the cleanest code. I also love to explain how and why the code works so you can also learn more from it.

Damián Rafael Lattenero

# 👋 Hi, I’m Damián **Senior Software Engineer** with 10+ years turning ideas into _real, working code_ — using **Kotlin**, **Java**, **Python**, **Haskell**, **JavaScript**, and **SQL**. --- ### 🚀 But here’s what really matters: I know how overwhelming programming can feel — and I’m *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 — **I’m here to help.** --- ## 🧠 How I Can Help ### **📍 Starting from zero?** - Learn **Python, Java, Kotlin, or Haskell** — no overwhelm, no nonsense. - Understand **core concepts**: variables, loops, functions — *and why they matter*. - Build **real projects**, not just toy examples. - Stop copy-pasting code you don’t understand — I’ll help you _actually get it_. --- ### **🎓 In school or bootcamp?** - Tackle **assignments** with clear explanations — 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. --- ### **💼 Already coding professionally?** - Write **meaningful tests** (JUnit, Mockito, pytest — no excuses). - Migrate from **Java → Kotlin** or **OOP → FP** — _without the pain_. - Work confidently with **Spring Boot, GraphQL, PostgreSQL, MySQL**. - Refactor legacy code for **clarity, speed, and sanity**. - Finally grasp **functional programming** — yes, *even monads* (no PhD needed). --- ## 🎯 My Teaching Style - **No ego, no jargon** → Ask anything. I’ll meet you where you are. - **"Why" over "what"** → I’ll help you _understand_, not just repeat. - **Adaptable & fun** → If cat memes help you learn, I’ll bring the cats. 🐱 --- ## ✅ Bottom line? Whether you’re stuck, starting out, or leveling up — **we’ll make progress, one clear concept at a time.**

Dan Cook

I have a long-standing passion for coding, and have received great feedback as tutor & mentor over 10+ years as a Software Engineer. I have an expert mastery of Javascript, Typescript, C#, GIT, CSS, HTML, and have implemented solutions at all levels of the tech stack. I feel strongly that software is built for people, and not the other way around: I strive to provide solutions that meet people where they are. As a programming language enthusiast, I have explored many languages & paradigms, both in terms of practical use and underlying mechanisms. This has given me a uniquely strong ability to: implement solutions that closely match human mental models; understand solutions apart from their coded form; spot incidental complexity in code; deconstruct and re-implement complex code-bases (e.g. when migrating legacy software). As a tutor and mentor, these experiences enable me explain things in human terms, and empathize with the gap between technology and the human mind. My favorite experience as both a software engineer and mentor, is that spark of discovery or understanding while walking someone (or vice versa) through a problem or explanation. Other interests: Piano, Stargazing, Hiking, Camping, Yoga, Mindfulness, Reading, Origami, Retro gaming, Sci-fi, Horror, Dad jokes, Playing with my kids & my dogs.

Sven Pedersen

Senior data-focused polyglot software engineer. Built several business intelligence systems + predictive analytics; used NLP + machine learning for metadata enrichment, has linguistic and cultural training, built payment processing systems, used various relational SQL databases and NoSQL. Specialties: Java, Clojure, Ruby, Python, Perl, text processing, data transformation + metadata enrichment, linguistics, automation (including DevOps), pattern recognition and machine learning. Also worked on PHP, Node.js, Backbone, AngularJS, iOS apps, and several other systems

Carlos Barini

Power Apps Python Data Science Artifical Intelligence (graduated) Visual Studio developer (MVC, MVVM, C#, webservices, mobile integrations) MCSA, MCSE, MCDBA Oracle Business Intelligence Analyst T-SQL (SQL Server) and PL-SQL (Oracle) Android, iOS, Windows phone developer Arduino skills

Arup Rakshit

I am a freelance web developer working out of India. My weapons of choices are : HTML, CSS, Javascript, SQL, Ruby, Ruby on Rails, React JS. I literally spend as much hours as possible every day on coding.

Christopher Sahnwaldt

Software Engineer

Bartek Banachewicz

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!