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Senior Java Backend Engineer | Spring Boot & REST
Senior Java backend engineer building scalable REST services with Spring Boot, PostgreSQL, Docker and Kubernetes in a hybrid team.
Senior Java Backend Engineer (Core Java, Trading Systems) @ Vistulo (for a major N. American bank)
Build low-latency trading systems in core Java for a major North American bank, focusing on performance, distributed services, and financial-domain problems.
Developer Fullstack (Java backend + Angular, portal/CMS)
Full-stack developer building and maintaining a Java backend with Spring Boot and an Angular frontend for an insurance-finance portal/CMS in a hybrid role.
Senior Java Backend Engineer — MES, Remote & Flexible
Build and maintain a manufacturing execution system (MES) and integrate SAP with industrial controls across sites using Java and modern tooling.
Senior Java Backend Engineer — Spring/Kafka, Remote
Builds and maintains a Java backend for a fintech app handling sales commission settlements using Spring, Kafka, and databases.
Senior Java Backend Engineer | Hybrid & Global Projects
Senior Java backend engineer building scalable Spring Boot services and REST APIs with PostgreSQL, ELK, and CI/CD in a hybrid Kraków team.
Senior C# Developer — AI-Driven Finance Backend
Senior C# developer building event-driven backend systems for XVA, liquidity, and financial resource management in a global finance institution, using .NET, MS SQL, and agentic AI tools.
JAVASCRIPT / TYPESCRIPT Backend Developer (max 20ooo pln) brutto
Build and maintain backend systems for a digital education platform using JavaScript/TypeScript, REST/GraphQL APIs, and NestJS with Kubernetes hosting.
Backend Developer with Python
Build backend services in Python (Flask/Django) for web apps, IoT, smart-city, and blockchain projects, collaborating from design through deployment.
Juniopr Backend Developer @ Kalamba Games
Build and maintain Java-based microservices for gaming platforms using Spring Boot, Kubernetes, and AWS, while ensuring observability with Grafana and Kafka.
Manager, Data Engineering - CAN
Lead a team that builds and operates the shared data platform (Databricks, dbt, GCP) and observability foundations that power analytics, AI, and customer-facing data products at a global supply-chain orchestration company.
Ruby on Rails/Python Developer Rzeszów, Białystok, Łódź, Remote Open Ruby on Rails/Python Devel[...]
Build and maintain backend services in Ruby on Rails and Python for client projects, focusing on scalable APIs, databases, and AI integrations.
Fullstack Python Developer @ Margo
Build and ship full-stack web apps using Python/Django on the backend and React.js on the frontend, writing unit, functional, and E2E tests.
Senior React Frontend Developer with Fixed Income experience @ Vistulo (for a major N. American bank)
Build and maintain React-based trading UIs for a major North American bank’s fixed income systems using TypeScript and OpenFin, collaborating with global teams.
Senior React Frontend Developer @ Vistulo (for a major N. American bank)
Build and maintain React-based desktop apps for a major North American bank’s bonds and commodities systems using TypeScript and OpenFin, ensuring high performance and reliability.
Senior Frontend Developer (14 000 - 18 500 net B2B)
Build and lead React-based UIs for energy-industry sustainability apps, writing tests and mentoring a small frontend team.
Frontend Developer (React) @ Kalamba Games
Build and maintain front-end game features using TypeScript, React, and PixiJS, collaborating with cross-functional teams to deliver high-quality gaming experiences.
Frontend Developer (Angular)
Builds and maintains Angular-based UI components for client systems, writes automated tests, and collaborates in a Scrum team.
Senior Java Software Engineer - Banking Experience
Senior Java engineer building and maintaining Spring Boot microservices and REST APIs for banking clients, with SQL, CI/CD, and cloud deployment.
Senior Staff, Software Engineer (Java-Microservices)
Lead engineering for Black Duck’s DevSecOps application security platform, building and scaling Java-based microservices on Kubernetes and cloud-native stacks.