Staff Software Engineer (Cloud/Backend)

Job Description

We are building a powerhouse Cloud/Platform team in Krakow, and we are looking for a Staff Software Engineer to be a part of this group. You will play a crucial role in architecting, implementing, maintaining, and scaling a massive multi-tenant SaaS distributed ecosystem, migrating on-premise components into a modern cloud architecture. You will partner closely with our Architecture team to shape the technical direction, acting as the ultimate subject matter expert (SME) for Node.js.

We are looking for a highly adaptable, heavyweight engineer who is "hot on code" and loves being deeply hands-on.

As a Staff Engineer in this elite team, you must be:

• Highly Adaptable: Completely comfortable and highly effective in a rapidly changing, dynamic environment.
• A Fast Learner: Able to quickly absorb new domain knowledge and master new technologies on the fly.
• Decisive: Capable of making quick, pragmatic, and highly technical decisions without getting stuck in analysis paralysis.
• A Team Player: Ready to collaborate effectively with top-tier engineers, sharing knowledge, and driving collective success.
• A Technical Influencer: You elevate the team's engineering standards by example, providing technical guidance, prototyping architectural solutions, and acting as a sounding board for complex design decisions.

(Note: While this role is heavily focused on backend engineering and cloud infrastructure, we operate with a strict 'You Build It, You Run It' culture. End-to-end ownership is key, and you will occasionally dive into the frontend (React) to deliver complete features).

• Experience & Mindset: 8+ years of backend engineering experience. You thrive in a dynamic environment, drive strategic technical decisions, and excel at collaborating with top-tier engineers.
• The Core Stack: Expertise in Node.js and TypeScript (including frameworks like NestJS or Express). You are highly hands-on and write extremely clean, scalable code.
• Cloud & Observability: Strong experience designing and building event-driven microservices in a major cloud provider (AWS, Azure, GCP) and implementing modern Cloud Observability patterns (metrics, distributed tracing, structured logging).
• Data & Infrastructure: Solid proficiency with relational databases (PostgreSQL), in-memory caching (Redis), and containerized environments (Docker, Kubernetes).
• End-to-End Ownership: Practical experience with (or a strong willingness to touch) React to help the team deliver complete, end-to-end features when necessary.

Big Advantages (Bonus Points):

• Infrastructure as Code: Experience treating infrastructure as software using Terraform, AWS CDK, or Serverless Framework.
• AI Tooling: Experience enriching and optimizing development using dev-assisting GenAI tools (such as GitHub Copilot, Claude or Cursor).
• Security & ZTA: Knowledge of Zero Trust Architecture (ZTA) and mTLS.
• Data Scale: Experience with time-series telemetry pipelines and long-term storage tiering.
• Observability: Experience implementing and utilizing observability stacks (Prometheus, Grafana, ELK, Datadog).
• System Design Excellence: Proven track record of actively contributing to system architecture, making high-level design choices, and solving hard distributed systems problems.