Mid/Senior Platform Engineer

We are looking for a passionate Platform Engineer with a strong focus on building technical platforms and shared infrastructure used across multiple engineering teams.  
You will join a high-performing platform engineering team responsible for foundational systems including internal libraries, shared backend services, CI/CD pipelines, developer tooling, and observability. This role involves significant ownership and collaboration, with a focus on improving engineering velocity, reliability, and scalability across the organization.  
You will build scalable cloud-native platforms using technologies such as TypeScript, Node.js, NestJS,   Kubernetes, Terraform, GitHub Actions, and AWS. You’ll collaborate with distributed cross-functional teams to deliver reliable and maintainable solutions.

Responsibilities  

- Build and maintain shared libraries and SDKs for areas such as authentication, logging,   configuration, API clients, and error handling.  
- Develop and support shared backend services and internal APIs.   
- Improve developer experience through service templates, scaffolding, and local development tooling.   
- Design and maintain CI/CD workflows with a focus on reliability, security, and speed.   
- Build and maintain observability tooling including metrics, logging, tracing, dashboards, and alerting. 
- Collaborate with product engineering teams to troubleshoot complex issues, support integrations, and review technical designs.   
- Participate in on-call rotations and incident response.

Core Requirements  
- 3+ years of experience building backend services using TypeScript and Node.js, ideally with   NestJS in production environments.   
- Strong software engineering fundamentals including understanding of CPU, memory, I/O,   concurrency, and performance bottlenecks.   
- Experience using AI-assisted developer tools effectively while maintaining strong engineering judgment. 
- Working knowledge of PostgreSQL including schema design, migrations, and query analysis.  
- Familiarity with AWS services such as DynamoDB, SQS, Kinesis, and Lambda.   
- Experience working with CI/CD pipelines, including troubleshooting and release workflows.   
- Experience with observability platforms such as Prometheus, Grafana, OpenTelemetry,   Datadog, or similar.   
- Ability to learn new tools, technologies, and domains quickly.   
- Commitment to writing maintainable, reusable, and high-quality code.
Senior-Level Expectations  
- Additional backend/platform engineering experience with ownership of systems in production environments.   
- Experience with PostgreSQL performance tuning including indexing strategies, query plans,   and migration management.   
- Experience designing and implementing CI/CD strategies including release flows, artifact promotion, and security considerations.   
- Experience building observability practices including SLIs/SLOs, dashboards, and alerting systems.   
- Ability to lead technical discussions, mentor engineers, and influence engineering standards across teams.
Soft Skills  
- Strong sense of ownership and accountability.   
- Excellent communication and collaboration skills.   
- Ability to work effectively with globally distributed teams.   
- Strong attention to detail and commitment to quality.   
- Strong problem-solving abilities and customer-focused thinking.   
- Comfortable working in fast-paced environments with multiple stakeholders and time zones.

Hybrid

Location: Krakow

Seniority Level: Middle