Senior Fullstack Engineer (Backend-Oriented)| HeadFound

About HeadFound:
HeadFound GmbH is a fast-growing, AI-powered recruitment technology company with offices in Germany, Poland, Austria, and Switzerland. We build modern SaaS products that combine machine learning, automation, and user-friendly interfaces to deliver faster and more accurate hiring. We are expanding our engineering team and looking for a Senior Backend Developer to help us scale our core platform, ensure system performance, and deliver clean, reliable backend services.

Job Overview:
We are seeking an experienced Senior FullStack Developer to join our fully remote or hybrid team (based in Poland). In this role, you will own the development and maintenance of critical backend services and APIs, optimize performance across distributed systems, and ensure seamless integration with third-party tools and internal services. You’ll work closely with cross-functional teams including DevOps, product, frontend, and architecture to deliver high-quality, production-ready code that drives our core business.

Key Responsibilities:
• Design, implement, and maintain scalable REST and GraphQL APIs using Node.js and NestJS
• Build efficient, well-structured database schemas and optimize SQL queries (PostgreSQL)
• Integrate third-party services such as payment systems, analytics tools, and authentication providers
• Configure and manage observability tools: OpenTelemetry (OTel), Grafana, Azure Monitor
• Deploy services using Azure cloud tools (Azure Functions, Azure Container Apps)
• Contribute to CI/CD pipelines (GitHub Actions) and containerization using Docker and Kubernetes
• Conduct code reviews, contribute to architecture decisions, and uphold backend development best practices
• Monitor production environments, troubleshoot incidents, and support performance tuning
• Collaborate with team leads and mentor junior developers to ensure continuous growth and improvement

Key Requirements:

Must-Have:
• 5+ years of backend development experience using Node.js, NestJS, and TypeScript
• Strong knowledge of relational databases (especially PostgreSQL)
• Hands-on experience integrating external APIs and third-party services
• Proficiency with observability and monitoring tools (OTel, Grafana, Azure Monitor)
• Solid experience with Azure cloud infrastructure (Functions, Container Apps), CI/CD workflows (GitHub Actions), and container orchestration (Docker, Kubernetes)

Nice-to-Have:
• Experience with microservices architecture and event-driven systems
• Understanding of durable functions and workflow orchestration
• Broader experience with the Azure ecosystem
• Working knowledge of frontend frameworks like React, and state management libraries such as Redux or Zustand (to support full-stack collaboration)
• Familiarity with type-safe backend-to-frontend communication using TypeScript

Are You ready? 😊
...and of course, your benefits:
• Fully remote work environment or hybrid model (Wrocław office)
• Private healthcare package
• Multisport card
• Flexible contract types: B2B, employment contract, or contract of mandate
• 30 days of paid time off (depending on contract type)
• Regular team events, workshops, and internal knowledge-sharing sessions