Senior Full-Stack Developer (AI-Native)

New

CresttAI software

Warsaw – hybrid or remote within the EUFull-TimeSenior

Salary165 - 185 PLN per hour

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Job Details

Languages: Fluent English.
Experience: At least 10 years of professional full-stack development experience; at least 3 years of hands-on experience incorporating AI into software development.
Required Skills: Node.jsPostgreSQLTypeScriptNest.jsReact

At least 10 years of professional full-stack development experience.
At least 3 years of hands-on experience incorporating AI into software development, with current daily use of tools such as Claude Code, Cursor, GitHub Copilot, Codex CLI or equivalent solutions.
Practical experience with coding agents, MCP servers and terminal-based workflows.
At least one independently developed, end-to-end product built with AI assistance, available as a live application or demonstrable project.
Strong TypeScript skills across backend and frontend.
Backend development experience with Node.js frameworks, preferably NestJS.
Frontend development experience with React and/or Next.js.
Strong PostgreSQL knowledge, including schema design, migrations and query optimisation.
Solid understanding of SOLID principles, clean or hexagonal architecture, domain-driven design and event-driven patterns.
Experience with Docker, CI/CD pipelines and Git-based workflows.
Fluent English.

Design, develop and deploy full-stack features across backend, frontend and infrastructure.
Use AI coding agents and CLI tools to accelerate delivery, critically reviewing and validating their output.
Make and document architectural decisions, including diagrams, trade-offs and Architecture Decision Records.
Implement authentication, authorisation, secrets management and input validation, addressing OWASP Top 10 risks.
Design for scalability through caching, queueing, database optimisation and vertical or horizontal scaling.
Develop and maintain unit, integration and end-to-end tests.
Implement logging, metrics and distributed tracing for monitoring and troubleshooting.
Mentor colleagues in effective AI-assisted development practices.

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