Full-Stack Developer (Backend-Focused, NestJS + PostgreSQL) — Trading Tournaments Platform

We’re looking for a backend-focused Full-Stack Developer to help build a real-time platform where users simulate trading activity across global markets. Each user enters a session, selects a trading pair, tracks their performance, and earns in-platform currency based on results. All are powered by structured logic, live data from MatchTrader, and reliable backend flow. You’ll join a small, agile team that’s building the backend from the ground up: stats tracking, deposits, rewards logic, marketplace integration, and more.

It’s not a trading exchange, not a game — it’s a performance-driven product with clear rules and clean architecture. You’ll build the logic behind sessions, calculations, rewards, and API integrations while keeping the front end running smoothly when needed.

How You’ll Contribute

• Build backend logic for trading sessions, stats tracking, deposits, and reward distribution
• Integrate with MatchTrader API for real-time market data and user interaction flow
• Implement internal currency logic and connect it to marketplace reward flows (e.g. Amazon-like catalogs)
• Ensure stable session logic and secure data handling
• Occasionally support frontend tasks (React) — UI for dashboards, session results, wallet info

• Collaborate with a senior backend engineer and frontend teammate in a tight-knit setup

   

What Makes You a Perfect Fit

• 3-4+ years of experience with Node.js/NestJS and PostgreSQL
• Solid grasp of session-based logic, data modeling, and backend architecture
• Strong TypeScript skills, clean and modular code
• Experience integrating 3rd party APIs and handling edge cases
• Comfortable working on early-stage products and owning features end-to-end

• Can balance backend focus with occasional full-stack involvement

   

Nice-to-Haves

• Experience with real-time apps or financial data platforms
• Familiarity with AWS and/or Docker
• Understanding of internal tokens/gamification logic
• Interest in trading, finance, or simulation-based tools
• Experience working in lean teams with product ownership

Our Tech Stack

NestJS, Node.js, TypeScript, PostgreSQL, React, microservices architecture, Docker, high-load infrastructure, AWS (S3, Lambda, EC2), CI/CD pipelines, MatchTrader API.

Hiring Process

The hiring process is clear and concise. It starts with a 30–40 min intro call with a Talent Partner — an opportunity to learn more about the project, Umber, and the team, as well as to discuss the candidate’s experience.

Next comes a technical interview (~1.5 hours) covering both React and Node.js.

The final step is a ~30 min conversation focused on managerial topics and organizational details.

Your next challenge is waiting. Let’s connect, talk about the impact we can make, and see if we’re the right fit for each other!

Who We Are

Umber is a full-cycle product agency founded in 2018. We started as a design-driven company and now build complex finance systems from the ground up. Our current focus: payment solutions, trading platforms, and tools for professional investors and traders.

We’re a small, ambitious, senior-level team working with top-tier financial clients. We’re passionate about finance, trading, and creating systems that don’t just work — they scale and shine under pressure. Check us out at https://umber.tech.

Why Join Us

• High-load engineering challenges — internal business systems, real-time trading, scalable backend systems, financial-grade security, modern React applications
• Cross-functional collaboration — work closely with designer and backend team on complex technical solutions
• Variety of projects — work on user management systems, analytics platforms, admin tools, CRM interfaces, and other internal services
• Small team, no bureaucracy — you’ll work closely with the CTO and contribute to architecture decisions
• Growth opportunities — learn from senior developers and expand from middle to senior level
• Flexibility — fully remote, Eastern European time zone overlap
• Mentorship and space to grow — if you’re good, we’ll make you great
• Impact — your code goes live, fast. You’ll contribute to both user-facing interfaces and high-load backend systems that power the entire gaming platform