Mid/Senior Platform Engineer

Job Description

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.

Benefits and Perks

Hybrid

Job Overview

Location: Krakow

Seniority Level: Middle