Backend Developer

About TRISERS

TRISERS is an AI-powered home-services marketplace (PWA), currently at MVP stage and moving fast toward launch. We're a small, high-ownership team in Warsaw, and we're looking for a backend engineer to help build the product from the ground up.

⚡ Please read before applying

This role requires immediate availability and a valid right to work in Poland already in place (PESEL UKR / EU citizenship / permit already granted). We are not able to sponsor or wait for a new work-permit procedure for this position. On-site in Warsaw is required — this is not a remote or hybrid role.

What you'll do

• Design, build and maintain the backend that powers our platform — APIs, data models, and third-party integrations

• Own architecture decisions and ship features quickly in a small team

• Write clean, tested, maintainable code and take part in code reviews

What we're looking for

• Commercial experience with NestJS and Node.js / TypeScript

• Strong PostgreSQL and Prisma — relational data modeling, query design, migrations

• Solid understanding of REST API design, authentication and clean architecture

• Ownership mindset, clear communication, reliable delivery

• Comfortable working on-site and in English

Nice to have

• Experience integrating payment systems or third-party APIs

• Experience building products from an early / MVP stage

What we offer

• Full-time umowa o pracę

• 10 000–12 000 PLN gross/month

• On-site work at our Warsaw office (Wola, ul. Erazma Ciołka 13)

• A real seat at the table in an early-stage company — your decisions matter here