Team Lead Fullstack Engineer (AI, Automation)

Quick Facts

• Role: Fullstack Engineer (path to Team Lead)
• Focus: end-to-end SaaS and internal tools; frontend + backend; AI-driven workflows and automation

Description

We’re looking for a Fullstack Engineer with team leadership experience who enjoys building complex systems, guiding other engineers, integrating external services, and using generative AI to accelerate development and automate workflows. You’ll develop end-to-end features across SaaS products and internal tools, collaborate on architecture and implementation decisions, and provide hands-on technical leadership for day-to-day engineering delivery.

Responsibilities

• Develop and contribute to end-to-end features across SaaS products and internal tools
• Collaborate with senior engineers on architecture and implementation decisions
• Provide hands-on technical leadership and support the day-to-day work of the engineering team
• Coordinate delivery, set technical direction, and maintain high engineering standards
• Mentor engineers, review code, and remove technical blockers
• Build modern high-performance frontends with Next.js and React.js
• Develop scalable backend services with Node.js / NestJS
• Design and integrate APIs (REST, WebSockets, external services)
• Build and maintain automation workflows and background jobs
• Work with async systems, queues, and event-driven architectures
• Integrate third-party services with rate limits, retries, and auth flows
• Use AI tools to improve development speed, testing, and automation
• Collaborate with product, data, and leadership teams
• Build MVPs and proof-of-concepts from scratch and validate ideas through experimentation
• Evolve prototypes into production-ready systems

Requirements

• 2.5+ years of professional full-stack experience
• Previous experience leading, mentoring, or coordinating the work of an engineering team
• Strong frontend skills in React.js / Next.js
• Backend experience with Node.js (NestJS preferred)
• Experience integrating external APIs (auth, pagination, retries, rate limits)
• Hands-on experience with modern AI tools (OpenAI, Claude, Cursor, etc.)
• Good SQL skills (PostgreSQL preferred)
• Experience working with async processing, queues, and background jobs
• Understanding of building reliable systems (error handling, retries, observability)
• Strong communication skills and ability to work cross-functionally
• Fluent in English and Polish

Benefits

• Work on high-scale SaaS systems processing hundreds of millions of events daily with real-time pipelines and data-heavy workloads
• Ownership from day one: influence architecture, technology choices, and product direction
• Collaborate with world-class engineers, AI specialists, and PMs
• Innovation-first culture with fast execution and minimal bureaucracy
• Opportunity to work with modern AI tooling in production
• Competitive senior-level compensation and career growth
• Social impact through automation products that empower businesses and communities