Fullstack Engineer (AI, Distributed Systems, Automation)

At Web Impact, we build cutting-edge, socially impactful products that redefine how businesses operate in the digital world. Our work focuses on high-scale SaaS systems processing hundreds of millions of events daily, with real-time pipelines and data-heavy workloads.

• 2.5+ years of professional full-stack experience.
• Strong frontend skills using React.js and Next.js.
• Backend experience with Node.js (preferably NestJS).
• Experience integrating external APIs with auth, pagination, retries, and rate limits.
• Hands-on experience with modern AI tools including OpenAI, Claude, and Cursor.
• Good SQL skills; preferably with PostgreSQL.
• Experience working with asynchronous processing, queues, and background jobs.
• Understanding of building reliable systems including error handling, retries, and observability.
• Strong communication skills and ability to work cross-functionally.
• Fluent in English and Polish.

Nice to have:

• Experience with Rust (async, Tokio, Axum).
• Experience with Elixir (Phoenix LiveView, GenServer).
• Understanding of distributed systems and architectures.
• Experience with multi-region deployments and geo-distributed infrastructure.
• Experience building systems with high parallelism.
• Familiarity with distributed databases and data consistency trade-offs.
• Experience with multi-tenancy architectures.
• Experience with high-throughput event pipelines.

• Develop and contribute to end-to-end features across SaaS products and internal tools.
• Build modern, high-performance frontends using Next.js and React.js.
• Develop scalable backend services using Node.js and NestJS.
• Design and integrate APIs (REST, WebSockets, external services).
• Build and maintain automation workflows and background jobs.
• Work with asynchronous systems, queues, and event-driven architectures.
• Integrate third-party services handling rate limits, retries, and auth flows.
• Use AI tools like Claude Code, Cursor, and OpenAI SDK to improve development speed, testing, and automation.
• Collaborate directly with product, data, and leadership teams.
• Build MVPs, proof-of-concepts, and new product ideas from scratch.
• Rapidly validate business ideas through experimentation and iteration.
• Help evolve successful prototypes into production-ready systems.

AI & Automation:

• Use tools such as Claude Code, Cursor, and OpenAI SDK in daily development.
• Build AI-driven workflows and integrations iteratively.
• Automate repetitive processes including data handling and integrations.
• Apply LLMs pragmatically in production.
• Take ownership from idea to production delivery.
• Prioritize speed and execution over perfection.

Informujemy, że administratorem danych osobowych jest Web Impact Sp. z o.o. sp. k., Rynek Główny 28, 31-010 Kraków. Dane osobowe będą przetwarzane wyłącznie w celu realizacji obecnego procesu rekrutacyjnego lub – w przypadku wyrażenia zgody – dla przyszłych procesów rekrutacyjnych. Masz prawo do dostępu, sprostowania, usunięcia danych oraz wniesienia sprzeciwu wobec przetwarzania.