Senior Full-Stack Engineer

Quick Facts

• Role: Senior Full-Stack Engineer

• Focus: end-to-end product development for AI security workflows (backend-heavy) and a developer UI

Description

Build durable backend workflows that run security agents, the APIs and integrations that deliver results to developers, and the underlying data model—plus the UI used by security teams. The service runs both in the cloud and in customer environments, so you’ll design and ship with both in mind. You’ll take features from prototype to production and help build AI-powered capabilities at the core of the product.

Responsibilities

• Take features from prototype to production, including messy parts

• Gather requirements through real conversations (not spec docs)

• Bring product ideas based on what users need

• Build APIs, integrations (GitHub, GitLab, MCP), data models, and UIs for security workflows

• Help build AI-powered features at the core of the product

• Keep services scalable, stable, and observable in cloud and on customer infrastructure

• Write well-tested code and review others’ code

Requirements

• 5+ years of professional software development, mostly full-stack

• TypeScript, Node.js, React/Next.js, and REST API experience

• Production experience with relational databases (MySQL) and backend systems (queues/workflows, retries)

• Experience with Docker, CI/CD, and AWS

• Hands-on AI experience integrating LLM APIs and building/using agents (MCP, RAG) or coding agents used daily

• Security-minded: know the OWASP Top 10 and write secure code

• Fluent English

Benefits

• 25,000–30,000 PLN + VAT/month on B2B, or full-employment contract

• Remote with flexible hours aligned to the Polish time zone (optional office in Gdańsk)

• Health insurance and gym budget

• Day off on your birthday