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Designs and builds enterprise-grade Java microservices with Spring Boot, Kafka, and BPM workflows in a cloud-native, containerized stack while driving architectural best practices.
Builds and optimizes RESTful services in Java/Spring Boot for a financial-services company, working with SQL databases and cloud APIs from a Szczecin office.
Builds and maintains Java microservices in the cloud using Spring Boot, PostgreSQL, Elasticsearch, and Kafka; designs architecture and reviews code.
Design and build high-performance Java microservices in a Kubernetes and GCP environment, focusing on distributed systems, REST APIs, and data pipelines.
Senior Java backend engineer analyzing and optimizing complex microservices for a global fintech client, using AI tools and collaborating across international teams.
Senior Backend Developer builds and maintains C#/.NET and Python services for HoloMedicine®, a certified medical XR platform handling medical imaging pipelines, real-time streaming to XR devices, and clinical workflow orchestration.
Build and maintain a cloud-native microservices platform in C#/.NET, own AWS infrastructure, and lead vendor transitions and knowledge transfer.
Build backend services in C# and Python for HoloMedicine®, a certified medical Mixed Reality platform used in clinical environments, focusing on APIs, data pipelines, and real-time XR device communication.
Builds and maintains Java backend services for an insurance-sector client using Spring Boot, Kafka, and Hibernate while collaborating in an Agile team.
Build and maintain Java backend services for aviation safety systems using Spring, Hibernate, and REST/SOAP APIs.
Build and maintain Node.js backend services and APIs for a logistics platform that orchestrates multi-modal deliveries.
Senior Backend Developer builds and maintains C#/.NET and Python services for a certified medical XR platform, handling imaging pipelines, real-time streaming, and clinical workflows in a regulated healthcare environment.
Builds and maintains backend services using Django and Python, designs REST APIs, and deploys to Kubernetes while optimizing PostgreSQL queries.
Builds and maintains backend APIs and distributed systems using Java, Spring Boot, Kubernetes, and AWS for a fintech product team in Kraków.
Builds and maintains a Laravel-based SPA that automates HR processes for corporate clients, using React, NodeJS, and MySQL.
Builds and maintains a NestJS (TypeScript) REST API for a fintech company, focusing on fee calculations, tariffs, invoicing, and external integrations with databases and systems.
Senior backend engineer building and scaling a cloud-native microservices platform in C#/.NET on AWS, with Terraform, Python ETL, and CI/CD pipelines.
Build and maintain the Ruby on Rails backend for a global SaaS invoicing platform, working with SQL databases and collaborating in an agile team.
Build and maintain backend services in Python (Django/Flask/FastAPI) and occasionally Ruby on Rails, working with PostgreSQL/MySQL and Docker while experimenting with AI tools.
Build and maintain backend services in NestJS (TypeScript) that power energy-trading workflows: billing engines, tariffing, invoicing, legacy integrations, and reporting pipelines.
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