10/16/2026 updated
100 % available
Senior Software Engineer | Full-Stack Development | Architecture | DevOps
Nowa Sól, Poland
Only remote
MSc, Computer ScienceAbout me
Senior Software Engineer & Solution Architect with 12+ years of experience. I build scalable full-stack and cloud solutions using Java, TypeScript, React, Node.js, Python, Go, GCP and AWS. Skilled in microservices, DevOps and AI/RAG. Open to remote B2B and part-time contracts.
Java (Programming Language)DevOpsPython (Programming Language)Node.jsAngular 2+Systems IntegrationTypeScriptEvent-driven ArchitectureReact.jsServer Side DevelopmentBackendBackend ProgrammingFull Stack DevelopmentApache KafkaReactive Programming
Java & Spring Boot Backend Development
Extensive experience designing and building backend microservices and REST APIs using Java and Spring Boot, including Hibernate ORM, applied across fintech, e-commerce, and IoT domains.
Node.js & TypeScript Full-Stack Development
Proficiency in building and maintaining full-stack applications using Node.js, NestJS, and TypeScript, exposing REST, GraphQL, and gRPC APIs, combined with React and Angular frontends.
Event-Driven Architecture & Messaging Systems
Deep expertise in designing event-driven systems using Kafka and RabbitMQ, enabling real-time data processing, device telemetry handling, and scalable platform communication.
PostgreSQL & Database Management
Solid experience working with PostgreSQL for relational data modeling, real-time dashboards, and supporting high-throughput backend services.
Docker & Kubernetes
Hands-on experience containerizing backend services with Docker and orchestrating deployments using Kubernetes in cloud-native environments.
Angular & React Frontend Development
Experience delivering Angular and React frontend modules, including shared business component libraries and SSO authentication integration via Keycloak.
CI/CD & DevOps Practices
Familiarity with CI/CD pipelines and DevOps workflows, supporting release stability and continuous delivery in agile, cross-functional teams.
Elasticsearch & Redis
Experience utilizing Elasticsearch for search and analytics workloads and Redis for caching and fast data access in distributed systems.
ERP Systems & COBOL Legacy Migration
Background in customizing ERP modules (Infor CloudSuite/Syteline) and assessing legacy COBOL programs for migration to modern platform services.
Extensive experience designing and building backend microservices and REST APIs using Java and Spring Boot, including Hibernate ORM, applied across fintech, e-commerce, and IoT domains.
Node.js & TypeScript Full-Stack Development
Proficiency in building and maintaining full-stack applications using Node.js, NestJS, and TypeScript, exposing REST, GraphQL, and gRPC APIs, combined with React and Angular frontends.
Event-Driven Architecture & Messaging Systems
Deep expertise in designing event-driven systems using Kafka and RabbitMQ, enabling real-time data processing, device telemetry handling, and scalable platform communication.
PostgreSQL & Database Management
Solid experience working with PostgreSQL for relational data modeling, real-time dashboards, and supporting high-throughput backend services.
Docker & Kubernetes
Hands-on experience containerizing backend services with Docker and orchestrating deployments using Kubernetes in cloud-native environments.
Angular & React Frontend Development
Experience delivering Angular and React frontend modules, including shared business component libraries and SSO authentication integration via Keycloak.
CI/CD & DevOps Practices
Familiarity with CI/CD pipelines and DevOps workflows, supporting release stability and continuous delivery in agile, cross-functional teams.
Elasticsearch & Redis
Experience utilizing Elasticsearch for search and analytics workloads and Redis for caching and fast data access in distributed systems.
ERP Systems & COBOL Legacy Migration
Background in customizing ERP modules (Infor CloudSuite/Syteline) and assessing legacy COBOL programs for migration to modern platform services.
Experience
Professional experience10+ years
Freelancer since2019
Languages
EnglishFluentPolishNative speaker
Project history
Delivering backend and frontend features for an enterprise e-commerce platform using Java/Spring Boot and Angular/TypeScript. Assessed legacy COBOL programs for migration to modern platform services. Contributed to a shared library of business components and integrated SSO authentication via Keycloak.
Built and maintained microservices for an IoT lighting management platform using Node.js/NestJS and React, exposing REST, GraphQL, and gRPC APIs. Designed real-time, map-based dashboards with PostgreSQL, RabbitMQ, Mapbox GL, and Deck.gl for live streetlight monitoring and control. Integrated with third-party hardware and lighting controllers, handling device telemetry at scale over a 5-year tenure.
Built Java/Spring Boot and Hibernate microservices and REST APIs powering core fintech currency-exchange operations. Delivered Angular frontend modules alongside Dockerized backend services, working closely with QA on release stability. Contributed to a forex backoffice system for Cyprus-based staff, integrating with the MetaTrader client platform.