Backend NestJS Developer (Poland)

About the role We are seeking a consulting partner with deep expertise in backend engineering, cloud-native architecture, and enterprise system integration. The selected organization will be responsible for delivering scalable, secure, and high-performance backend solutions while providing technical leadership and guidance across teams.

Key Responsibilities

• Design, develop, and maintain enterprise-grade backend services using Nest.js, TypeScript, and NodeJS
• Architect and implement high-performance REST and SOAP APIs for complex enterprise integrations
• Optimize PostgreSQL databases for high availability, partitioning, replication, and performance tuning
• Define and enforce secure coding practices, design patterns, and architectural principles
• Collaborate with DevOps, frontend, QA, and product stakeholders to ensure seamless integration and delivery
• Troubleshoot production issues, enhance reliability, and implement performance tuning at scale
• Lead code reviews, enforce coding standards, and integrate quality gates in CI/CD pipelines
• Mentor client engineering teams, contribute to technical strategy and architecture decisions
• Integrate external systems, tools, and services to extend backend capabilities
• Provide continuous innovation by adopting cloud-native, serverless, and emerging backend technologies

Required qualifications

• Minimum 5+ years of backend development experience with Node.js, TypeScript, and NestJS.
• Proven expertise in designing and scaling RESTful APIs and SOAP services for enterprise-grade systems.
• Advanced proficiency in PostgreSQL (performance tuning, replication, partitioning).
• Strong experience with Git workflows, CI/CD pipelines, and automated quality controls.
• Deep understanding of cloud-native architectures and serverless implementations.
• Hands-on experience with AWS services (EC2, EKS, Lambda, S3, RDS, CloudWatch, API Gateway).
• Solid knowledge of Kubernetes (deployment, scaling, troubleshooting).
• Experience mentoring teams and driving technical leadership in multi-stakeholder environments.
• Expertise with Splunk (monitoring, dashboards, alerting).
• Familiarity with Spinnaker or advanced deployment pipelines.

Technology / Systems Expertise

• Node.js + NestJS + TypeScript – backend framework
• PostgreSQL with advanced extensions (Citus, Patroni, TimescaleDB)
• Swagger / OpenAPI + Postman – API documentation & testing
• GitHub / GitLab + GitHub Actions / Jenkins – version control & CI/CD automation
• SonarQube, ESLint, Prettier – code quality enforcement
• AWS (EC2, EKS, Lambda, Fargate, S3, RDS, CloudWatch, API Gateway) – cloud & serverless stack
• Docker + Kubernetes (EKS) + Helm – containerization & orchestration
• Splunk, Prometheus, Grafana – monitoring & observability
• Spinnaker / ArgoCD/ Azure Devops – automated deployment pipelines
• Terraform / AWS CDK – infrastructure as code

Skills & Capabilities

• Demonstrated expertise in backend architecture and scalable API design
• Advanced database optimization & high availability strategies
• Strong proficiency in CI/CD, GitOps, and DevOps integration
• Hands-on experience in cloud-native and Kubernetes-based deployments
• Proven ability to mentor engineers, lead architecture decisions, and drive best practices

All our positions are Remote and are available as Full Time Employment or B2B Contracts