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June 27, 2026

Senior FullStack Engineer

Senior • Remote

5,000 - 5,800 EUR

Warsaw, Poland

Job Purpose

We are a fast-growing tech company with a portfolio of SaaS products serving diverse industries. Innovation, performance, and design precision are core to our values. As we scale, we are looking for a talented Senior FullStack Developer to take a key role in crafting highly performant, maintainable, and user-focused web applications.

Key Responsibilities

  • Contribute to both backend (NestJS) and frontend (NextJS) systems by designing and building scalable, secure, and maintainable features, while leading architecture decisions across services, APIs, and cross-stack boundaries
  • Champion clean code, modular design, and testability through active contribution, reusable components, and mentoring
  • Drive system-level decisions around performance, observability, and scalability, ensuring alignment between product goals and technical implementation
  • Own and enforce code quality via reviews, maintain CI/CD reliability, and collaborate closely with DevOps to ensure release stability and consistent environments
  • Monitor and optimize system performance, define logging and alerting standards, and lead incident response and continuous improvement efforts
  • Work closely with product, QA, and designers to unblock delivery, while mentoring engineers and fostering technical alignment across squads

Required Skills & Qualifications

  • 5+ years of fullstack development experience
  • Strong experience with NestJS, Node.js, NextJS, and TypeScript
  • Strong understanding of PostgreSQL, data modeling, and optimization techniques
  • Solid experience building and consuming REST APIs with secure JWT-based authentication flows
  • Proven ability to lead architecture decisions, enforce code quality, and guide teams through technical complexity
  • Familiarity with CI/CD pipelines, Docker, and environment management (K8s, ArgoCD are a plus)
  • Experience with frontend performance optimization (SSR, lazy loading, state management)
  • Comfortable working in cross-functional squads with product, QA, and design
  • Good communication skills

Nice to Have

  • Experience with component libraries (e.g., Storybook, React UI) or design systems
  • Exposure to event-driven systems using tools like Kafka, RabbitMQ, or AWS SNS/SQS
  • Knowledge of Infrastructure as Code (Terraform)
  • Background in observability tooling (e.g., Sentry, Datadog, Groundcover) and defining alerting/logging standards
  • Contributions to internal platforms, shared packages, or developer experience tools

Soft Skills

  • Clear written and async communication, especially in distributed teams
  • Systemic thinking — sees the bigger picture across stack, squads, and product
  • Ownership mindset, from design to delivery to incident resolution
  • Pragmatic decision-making, balancing trade-offs in real-world scenarios

Key Performance Indicators (KPIs)

  • End-to-end feature delivery reliability
  • Architecture quality and system scalability
  • Code review throughput and mentorship impact
  • Production stability and issue resolution time
  • Documentation, testing, and developer experience

What We Offer

  • Competitive compensation
  • 22 paid vacation days + local national holidays
  • Annual learning & development budget
  • Opportunity to impact a fast-growing multi-product company
  • Cross-functional projects, modern stack, and zero legacy burden

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