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Top freelance Ruby on Rails developers available to hire
Freelance Ruby on Rails Developer5.0Ā (43 reviews)
I'm a multi-talented senior-level developer with a focus in webdev and Linux servers, and have experience working with various sorts of code on various projects. I have very strong troubleshooting skills, am adept at learning new tech, and have some secondary cybersecurity experience (such as conducting informal security audits).
I'm enthusiastic about sharing knowledge, am practiced at explaining how code works, and am eager to help people learn about programming!
Availability is typically 11am - 11pm local time (UTC+7), although I have an hour or two of flexibility on that.
Freelance Ruby on Rails Developer5.0Ā (10 reviews)
Iām a Technical Lead and Full-Stack Developer with 17+ years of experience delivering robust web applications and SaaS platforms. I have led engineering teams through complex projects, balancing hands-on development with mentoring and process improvements to consistently meet aggressive deadlines. Notably, I helped scale infrastructure and improve performance for SaaS products used by tens of thousands of users. I excel at driving feature delivery end-to-endāwhether implementing APIs, optimizing workflows, or guiding teamsāas a dependable executor and problem solver.
I'm Jon and I love mentoring junior engineers!
For 10+ years I lived & breathed š±mobile.. worked on top 10 App Store apps (Google Maps, Gmail, Google search) as well as a bunch that didn't see the light of day. The pressure took it's toll finally & I followed the "burnout track" and took 6 month sabbatical (that would later turn into almost 3 years). My family & I left the bay with 8 suitcases of all our belongings, and i thought tech would only be in my rear view mirror...
I exchanged the standup desks & nap pods of silicon valley to serve families in the slums of Philippines & Cambodia. To my utter surprise and delight though, these families were happier than I was. Something was missing?
We came back to the mainland & I tried my hand at using tech for good, by working on the "strava for sobriety" app and it was amazing. I was finally helping ppl again!
But as w/ many startups, funding fell through...
I then went to help a big, well-funded startup who's goal was "tech for good", specifically in non-profit church space. I was so excited! And somehow, in the midst of "strat sums" and super fun budgets I lost my way... I actually kind of lost heart.
Hey there! I'm Owais Jamil and Iām a software engineer with roots in New England and Austin, TX. Right now Iām enrolled as a masterās candidate at the University of Texas, most recently worked as a senior backend engineer at Edlink. I have experience working on mobile and web apps, and have tutored and taught others in the past.
Are you looking for a hands-on Full-Stack Architect who can build, scale, and support high-performance AI and SaaS platforms from the ground up? With over 10 years of professional experienceāI specialize in architecting fast, secure, and resilient applications with real-time, AI-integrated capabilities.
**What I Bring to the Table**
š **AI-SaaS Execution:** At MSBAI, I built the admin platform for the GURU Assistant, an LLM agent that diagnoses and fixes technical issues in scientific workflows. Iāve debugged AI-generated code, optimized ML pipelines in real-time, and translated LLM outputs into production-ready tooling.
āļø **Scalable Architectures:** From building live simulation UIs to secure multi-tenant marketplaces and 3D modeling SaaS apps, Iāve delivered systems that serve thousands of concurrent users with high availability.
š§ **Full-Stack Mastery:** Expertise in TypeScript, React, Next.js, Node.js, Go, PostgreSQL, GraphQL, and low-latency backends using Rust and serverless functions on AWS and Supabase.
š **Cross-Domain Versatility:** Iāve worked on platforms ranging from MLOps and scientific computing (MSBAI) to edtech mentorship networks (Scholarly) and cybersecurity labs (Xintra).
š¬ **Developer Empathy + AI Support:** Iāve supported developers using AI agents by debugging generated code, writing CLI tooling, and guiding teams through adopting LLMs effectively in their workflows.
**Why Work With Me**
š§ **End-to-End Ownership:** I thrive in fast-paced teamsāleading system design, writing clean production code, and mentoring devs while delivering measurable impact.
š§° **Startup-Ready Mindset:** Iām equally comfortable building MVPs from scratch or modernizing legacy systems to support scale and maintainability.
š **Proven Outcomes:** I've shipped everything from Slack-integrated dashboards and Gmail margin calculators to low-code builders and cross-platform mobile apps.
**Tech Proficiency**
* **Frontend:** React.js, Next.js, Tailwind CSS, React Native
* **Backend:** Node.js, Express, GraphQL, Rust (Axum), Python (FastAPI)
* **Data & AI:** PostgreSQL, Supabase, MongoDB, Redis, LLM workflows
* **Cloud & Infra:** AWS, Supabase, Docker, GitHub Actions, Vercel
* **DevOps & Testing:** Cypress, GitLab CI/CD, Terraform, observability stacks
**Industries Served**
* š§Ŗ ML/AI Ops (MSBAI)
* š SaaS & Developer Tools (Xintra, Scholarly)
* š„ Healthtech (Loop Health)
* š® Gaming Platforms (Joyride, Kiwi)
* šļø E-Commerce (GlowRoad)
Letās collaborateāwhether youāre scaling an AI-native SaaS platform, building a developer-first observability tool, or launching a privacy-first user experience, I bring speed, technical depth, and real-world execution.
Freelance Ruby on Rails Developer5.0Ā (458 reviews)
I'm a full stack software engineer, technical writer and computer science educator. I enjoy testing, debugging, refactoring, application design, maintaining projects and teaching.
My primary technologies are JavaScript, TypeScript, React, Express (PERN stack), Playwright, Puppeteer, Python, Flask and C. See my [Stack Overflow tags](https://stackoverflow.com/users/6243352/ggorlen?tab=tags) for more technologies ordered roughly by my interest and experience.
In addition to Stack Overflow, I'm active on [Code Review Stack Exchange](https://codereview.stackexchange.com/users/171065/ggorlen). Feel free to peek at a few of these reviews to get a sense of the insights I can offer your code.
I'm looking forward to hearing about your project!
_<sub>Profile picture by the wonderful [Emily Huston](https://emilyhuston.github.io) ā¤ļø</sub>_
Freelance Ruby on Rails Developer5.0Ā (26 reviews)
An accomplished and high-motivated IT professional with 6+ years experience of IT leadership involved in web development, application development and System & Solution Architecture. My main competency is in building rich client-side applications, on both sides back-end and front-end. I strongly believe in TDD as the only way to build a bullet-proof code that makes everyone happy and it allows me to rest at night. Reaching 100% test coverage is my passion.
**SKILLS:**
ā Specialities: Computer Engineering, Software Engineer, Web Development, Mobile development, Open Source
ā Languages:Ruby(6 years), Javascript(4 years), Nodejs(1 year), Elixir(1 year)
ā Backend Frameworks: Ruby On Rails(6 years), Phoenix(1 year)
ā Frontend Frameworks: AngularJS(4 years), ReactJS(2 years)
ā Relational database:Postgresql(6 years), MySQL(6 years)
ā NoSql databases:Elasticsearch(4 years), Redis(3 years), MongoDB(3 years)
ā Other technologies:āRabbitmq, Redux, Universal rendering, HTML, CSS, SCSS,
BEM, Docker, AWS, Google Cloud Platform, Webpack, Git, Progressive web apps
**LINKS:**
https://github.com/mpospelov
https://stackoverflow.com/users/2460416/mpospelov
https://codementor.io/mpospelov
https://www.upwork.com/o/profiles/users/_~0182077648cc549f21/
https://www.toptal.com/resume/mikhail-pospelov
Freelance Ruby on Rails Developer5.0Ā (20 reviews)
Senior software engineer with 5+ years of experience in backend web technologies including Ruby on Rails, Python, Go, and MySQL. Currently at Tesla, previously EasyPost. Bachelor's in Computer Science. Main strengths include architecting applications and backend API development, have also worked in fullstack roles.
The best part of software engineering is that you never stop learning new things.
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Frequently asked questions
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