Senior Backend Engineer (TypeScript / Python / Kubernetes)

Tiivistelmä työpaikkailmoituksesta: Senior Backend Engineer to build scalable cloud-native platforms on Kubernetes using TypeScript (Node.js) and Python, owning features from design to production. You will design and develop REST and event-driven microservices, implement OAuth2/OIDC/JWT-based authentication, write automated tests, and deploy services with Docker, Helm and CI/CD. The role requires at least five years of backend experience with strong TypeScript and/or Python skills, knowledge of distributed systems, PostgreSQL, observability, and Kubernetes. Greenstep offers a salary model that matches responsibilities and experience and a Together bonus sharing 10% of annual operating profit, the role is hybrid across Finnish offices (preferably Espoo), requires a full-time work permit, and applications are reviewed until August 17, 2026. Tämä tiivistelmä on luotu tekoälyn avulla. Greenstep is a growing, global group helping thousands of companies in Europe to grow through clarity. We are a technology-oriented company with Finnish roots, founded in 2010. In addition to Finland, we currently operate in Sweden, Norway, Estonia, Denmark, and the Netherlands. Our team of around 800 experts consists of seasoned professionals in areas such as accounting, CFO services, financial management, HR, analytics, ERP and CRM technologies, payroll, as well as tax and legal services. We are an agile growth company, and our service offering continuously expands in line with our customers’ evolving needs. We are now looking for an experienced Backend Engineer to help us build scalable backend platforms and distributed systems! The Role As a Backend Engineer with a focus on scalable backend platforms and distributed systems, you'll work on a cloud-native platform built on Kubernetes, developing multiple backend services in TypeScript (Node.js) and Python, integrating authentication, writing automated tests, and deploying with modern Kubernetes tooling. You'll collaborate with platform and product teams to build secure, observable, and production-ready systems, and own features from design through deployment and operations. Domain experience in accounting, payroll, or ERP is a significant advantage, since much of what we build models for real financial and business workflows. You will : Design and develop scalable backend services and REST/event-driven APIs in TypeScript (Node.js) and Python. Design software that behaves reliably in distributed systems (scalability, high availability, fault tolerance, idempotency, retries, caching). Implement secure authentication and authorization (OAuth2, OIDC, JWT, RBAC) and secure API design. Write unit, integration, and end-to-end tests, and take part in code reviews. Containerize applications with Docker and deploy/maintain services on Kubernetes using Helm. Work with CI/CD pipelines to automate builds, testing, and deployments. Debug production issues across distributed services and improve performance, reliability, and observability. You enjoy working closely with frontend, DevOps, and product teams to shape solutions from idea to implementation. You're comfortable contributing to architecture and design discussions , and you take pride in helping less experienced engineers grow. What we're looking for You bring at least five years of backend engineering experience and enjoy solving complex technical challenges. You have strong problem-solving and debugging skills, can reason about distributed systems , and are comfortable working independently while collaborating closely with cross-functional teams. You take ownership of your work, care about writing clean, maintainable, well-tested code, and communicate clearly with others. You're also happy to share your knowledge and support the growth of less experienced colleagues through mentoring and guidance. Required skills: Strong experience with TypeScript (Node.js) and/or Python , including asynchronous programming . Designing REST APIs and microservice architectures. Relational databases ( PostgreSQL preferred); message queues / event-driven architectures a plus. Distributed systems : service-to-service communication, scalability, fault tolerance, retries, circuit breakers, caching, API versioning, observability. Kubernetes and cloud-native : Docker, Helm, networking, ConfigMaps/Secrets, Ingress, rolling deployments, health probes, resource management, production deployments. Security : OAuth2, OIDC, JWT, RBAC, secure API design, secrets management. Quality : unit/integration/API testing, test automation, mocking, static analysis. DevOps : Git, CI/CD (GitHub Actions, GitLab CI, or similar), Infrastructure as Code, release management. Preferred Qualifications : Accounting, ERP, payroll, or financial software domain experience - a strong advantage and a real factor in our hiring decision. API gateways/service mesh ( Traefik, Kong, NGINX, Istio, Linkerd ), message brokers ( Kafka, RabbitMQ, NATS ). Observability ( OpenTelemetry, Prometheus, G