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Hans Gamarra

Barranquilla, Colombia · Remote-friendly

Hans Gamarra

Senior Full Stack Engineer

I build reliable web products with Ruby on Rails APIs and React/Next.js front ends—shipping for distributed teams from Colombia.

Email hans.gamarra1303@gmail.comDownload résumé (PDF)LinkedIn profileGitHub @hepu

Selected work

Representative engagements across fintech, security, esports, and product companies—full stack delivery with an emphasis on maintainable Rails and React ecosystems.

  • Deep Space Robots · CRU Global

    Worldwide launch on Next.js and Rails

    Problem
    CRU Global needed a modern public experience and API-backed workflows for a global audience.
    What I did
    Full-stack development pairing a Next.js application with a Ruby on Rails API, from implementation through launch readiness.
    Stack
    Next.js · TypeScript · Ruby on Rails · PostgreSQL
    Outcome
    Delivered an integrated web platform aligned with a worldwide rollout timeline.
    Read case study

  • Koombea · Tuily

    Fintech card administration and integrations

    Problem
    Tuily required secure card lifecycle tooling and connections to payment and banking partners.
    What I did
    Built and extended Rails services for card administration, integrating Mastercard and Domina flows and supporting operational tooling.
    Stack
    Ruby on Rails · PostgreSQL · Redis · REST APIs
    Outcome
    Enabled product teams to operate card programs with dependable backend integrations.
    Read case study

  • Encora · Synack

    Features on a global security platform

    Problem
    Synack’s platform needed steady feature delivery and maintainable full-stack changes at scale.
    What I did
    Worked as a senior engineer on Rails and React, shipping features, reviewing code, and joining technical design discussions.
    Stack
    Ruby on Rails · React · PostgreSQL · Redis
    Outcome
    Helped keep the security platform evolving with robust, review-ready contributions.
    Read case study

  • Ideaware · Activision / Blizzard esports

    High-traffic league sites and survey APIs

    Problem
    Overwatch League and Call of Duty League properties needed fast marketing sites and APIs that could handle event traffic.
    What I did
    Developed Next.js and Node experiences with ContentStack, plus a high-concurrency survey API supporting live fan engagement.
    Stack
    Next.js · Node.js · ContentStack · React
    Outcome
    Supported major league launches and live events with performant front ends and APIs.

  • AppMeUp · AppMeUp

    Led Rails/React platform and mobile delivery

    Problem
    A growing product company needed full-stack leadership across web, search, mobile, and AWS operations.
    What I did
    Led a developer team building Rails and React applications, React Native apps, Elasticsearch-backed search, and AWS infrastructure for high concurrency.
    Stack
    Ruby on Rails · React · React Native · Elasticsearch · AWS
    Outcome
    Shipped multi-surface products with scalable search and cloud hosting practices.

Experience

A concise timeline of engineering roles from startups and consultancies to global platforms.

  1. 2024 — Present

    Full Stack Developer · Deep Space Robots

    Next.js and Rails delivery for client programs including CRU Global’s worldwide launch.

  2. 2023 — 2024

    Senior Back End Developer · Koombea

    Rails backend work on Tuily fintech—card administration, Mastercard, and Domina integrations.

  3. 2021 — 2023

    Senior Software Engineer · Encora (Synack)

    Rails and React feature development on Synack’s global crowdsourced security platform.

  4. 2017 — 2020

    Full Stack Developer · Ideaware

    League marketing properties for Activision and Blizzard plus high-concurrency fan engagement APIs.

  5. 2013 — 2017

    Senior Full Stack Developer · AppMeUp

    Team lead across Rails, React, React Native, Elasticsearch, and AWS for client products.

  6. 2011 — 2014

    Web Developer · GAMA Creativos

    Enterprise web solutions with PHP, JavaScript, and WordPress for regional clients.

Skills

Tools and platforms I reach for when shipping production software.

Frontend

  • Next.js
  • React
  • TypeScript
  • React Native
  • Tailwind CSS

Backend

  • Ruby on Rails
  • Node.js

Data

  • PostgreSQL
  • MySQL
  • Redis
  • Elasticsearch

Cloud & delivery

  • AWS
  • CI/CD
  • Linux

About

I am a senior full stack engineer with more than twelve years building web and mobile products for international teams. I am based in Barranquilla, Colombia, work remotely with U.S. and global clients, and communicate comfortably in English and Spanish.

My sweet spot is pairing disciplined Rails APIs with thoughtful React or Next.js interfaces—shipping features, reviewing code, and helping teams make pragmatic technical decisions.

Outside of work I play drums; music keeps me creative, but engineering is what I optimize my calendar around.

Contact

Open to senior full stack roles and select contract engagements.