Senior Full-Stack Developer (Backend-Focused)

Hi 🙌

We are looking for a Senior Full-Stack developer with a focus on backend to join us for long-term cooperation.  

You will strengthen our team in developing a comprehensive CRM platform for marketing agents. This is a key operational product for managing marketing agents who buy advertising. The platform integrates accounting, reporting, and budget tracking into a single system, helping our client effectively scale his business.

If you enjoy ownership, smart challenges, and building without bureaucracy slowing you down — we’d love to connect!

🛠 How You’ll Contribute:

• Develop and implement a scalable backend for our high-load platform.
• Optimize PostgreSQL databases for massive data throughput.
• Build and scale microservices to keep payment transactions smooth and reliable (Node.js, NestJS, gRPC).
• Integrate payment APIs to make deposits and withdrawals seamless.
• Occasionally assist with frontend tasks (React) — e.g., dashboards, transaction monitoring.
• Collaborate with a team and participate in technical decision-making.

🎯 What Makes You a Perfect Fit:

• 5+ years of hands-on experience building server-side solutions with Node.js and NestJS.
• Mastery of microservices and async processing (gRPC).
• Deep experience designing and optimizing scalable, high-load systems (ideally in fintech or payment projects).
• Deep expertise in PostgreSQL—designing and tuning databases for large-scale data.
• Strong TypeScript skills and a commitment to clean, reliable code.
• Comfortable switching context when needed and supporting frontend if required (React).

• Take responsibility and promote matters independently.

   

👍 Nice-to-Haves:

• Experience building CRM systems, fintech platforms, or marketing tools.
• Understanding of high-load systems, microservices architecture, and Docker.
• Team lead experience or interest in mentoring others.

🧰 Our Tech Stack:

NestJS, Node.js, TypeScript, PostgreSQL, React, microservices, Docker, AWS, CI/CD pipelines, high-load architecture, and provider APIs.

🚀 Hiring Process:

The hiring process is clear and concise. It starts with a 40–60-minute 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 frontend/backend parts. The final step is a ~30-minute conversation focused on managerial topics and organizational details.