Stare Miasto k/Konina (PL), Poland
Onsite
Job Description
Full stack senior Front-end Software Engineer skilled in React, TypeScript, and modern web development to build end-to-end solutions. Someone who is excited to have end-to-end ownership of their domains, working within the full development cycle, and directly impacting the end user experience and value delivery promoting a product mindset by closely working with the business.
Co-create features in collaboration with other SW engineers, Product Analysts, UX specialist and data scientists.
Build scalable solutions, component-based architecture
Collaborate with other cross functional teams to deliver technical solutions
Contribute to the technical direction and frontend standards
Implement and ensure best practices to improve quality, performance and observability
Must Have Requirements:
Strong Frontend engineer experience (typically 5 -7) in an agile cross-functional team, ideally in a product- driven, customer facing environment (not just executing tickets).
Experienced across the full software development lifecycle
Core: Proficient with modern React ecosystem, Next JS (SSR/SSG), Storybook and TypeScript
Solid grasp of component architecture, performance optimization, and scalable code design.
State & Data Fetching: GraphQL with Apollo Client and React Hook Form/Formik
Monorepo & Tooling: Nx (monorepo orchestration, caching)
Testing: Jest, Testing Library
Data-driven by nature; you use metrics, A/B tests, and experimentation to validate decisions and continuously improve the user experience.
Committed to quality through testing (unit, integration, e2e,) and code reviews, and you use CI/CD pipelines as part of your workflow optimizations
Nice to have Requirements:
React Native (app development)
Playwright and Cypress for e2e testing
Exposure to AI/ML models
Neo4J (if full stack, as the team has some components)
Infrastructure Awareness: Terraform and Google Cloud (Cloud Build, Cloud Tasks, Open Telemetry tracing)
BFF/GraphQL stitching patterns.
Soft skills/ Mindset:
You work in a structured, self-directed way
You are a strong communicator who thrives in cross-functional teams, collaborating closely with product managers, designers, and backend engineers
You’re a multiplier, like to collaborate with your team members and you like to be part of a team, not working alone or in the background
You see technology as a means of solving a real customer problem
You build it, you own it. You take full ownership from discovery to deployment to continuously improving based on user and performance data
You are eager to learn, you have an ambitious learning wish list and are open to giving and receiving feedback