Freelance backend & cloud engineer — production NestJS microservices and the cloud infrastructure they run on, AWS, Kubernetes, or both, for B2B SaaS, marketplaces, and regulated platforms.
NestJS, TypeScript, Node.js. Multi-tenant APIs, CQRS, event-driven and durable-workflow architectures (Temporal.io). tRPC + Zod contracts, payments, identity, RBAC/ABAC.
AWS Serverless (Lambda, Step Functions, EventBridge) and Kubernetes (Helm, ArgoCD, Istio). Terraform with 100+ modules in production. GitHub Actions / GitLab CI/CD. Vault, OpenTelemetry, security-pipeline tooling.
Computer-vision and photogrammetry SaaS (darkponyfactory.pl): multi-stage GPU pipeline on Modal (BiRefNet masking → COLMAP + OpenMVS reconstruction), NestJS backend, full observability stack.
Backend platform engineering on a regulated B2B SaaS product. Platform and services engineering across the full delivery lifecycle — from backend API design and cloud infrastructure to security posture and observability.
B2B Expert Network SaaS on AWS Serverless. Designed the multi-tenant API platform with CQRS and event-driven patterns. Built an automated engagement pipeline, a graph-based recommendation system on Amazon Neptune, and a real-time high-throughput event-processing pipeline (MongoDB Change Streams → Kinesis). Owned 100+ Terraform modules across four environments with fully automated CI/CD. Led backend & DevOps hiring.
One of the world's largest coworking marketplaces. Developed serverless v3 APIs on NestJS + AWS Lambda with a hybrid SQL search engine (PostgreSQL + ParadeDB) and geospatial capabilities. Modular monolith of 250+ models managing global booking lifecycles, dynamic pricing, and Stripe payment processing. High-volume data sync pipelines (GraphQL + EventBridge).
Backend and DevOps engineering for international clients delivered through a Polish software house. AWS and Kubernetes infrastructure, CI/CD pipelines, and containerisation strategies across multiple product engagements. Notable project: aarmy.com.
End-to-end image-to-3D-mesh SaaS. NestJS API with Drizzle ORM on Neon PostgreSQL, Keycloak OIDC auth, React dashboard on Cloudflare Pages. Multi-stage GPU pipeline on Modal: BiRefNet for masking, COLMAP 3.11.1 + OpenMVS for sparse SfM, dense stereo, triangle meshing, and UV texturing. Cloudflare R2 with presigned uploads. Full LGTM observability. darkponyfactory.pl
Available to slot into your team and start shipping — ongoing retainer, one-off sprint, or codebase review. Remote, EU timezone. Response time under 24 hours.
8+ years engineering production backends — Node.js/AWS ecosystem, strong DevOps/IaC discipline. Engineering leadership background: recruiting, performance reviews, mentoring. Postgraduate in Cybersecurity (Jagiellonian University, 2024–2025). Working in English.