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Independent fullstack developer in Brzeg, Poland, building web applications with Django, Django REST Framework, and React. The role goes beyond completing tickets — the developer is expected to talk with business stakeholders and clarify requirements. Offered as B2B contract or umowa zlecenie (UZ).
Senior Python developer (VP) on Citi's ACE Quant Development team, building and maintaining the derivatives counterparty credit risk application used for internal risk management and regulatory capital. Day to day: optimizing calculation run-time, integrating quant library updates, assisting cloud migration, and supporting build/test/release, using Python, Windows/Linux, shell scripting, Git and J
Develops and maintains the company's internal business application end to end: building features in Angular 20, writing PL/pgSQL logic in PostgreSQL, integrating with external apps, websites, and mobile software, and producing code and user documentation. Hybrid role from the company's Łódź office; core stack is Angular, PostgreSQL, and Python.
Backend Software Engineer 2 on Allegro's Translations team in Warsaw, building machine-translation and continuous localization services. Day to day you code in Kotlin/Python, work with MongoDB at large scale, and orchestrate AI/ML services in a Kubernetes-based microservices ecosystem, in a hybrid 4/1 model.
Python Software Engineer (recruited by Verita HR for one of the world's largest banks) who transforms quantitative teams' code into production-ready services and develops a Python quantitative library, collaborating with quant modellers, IT and front office. Core stack: Python 3, numpy, pandas, OOD and distributed systems; hybrid work from Kraków on a B2B contract.
Hire-Fox is hiring a Python/Java software engineer in Poland to act as first responder for customer escalations on a SaaS product, building debugging tools and troubleshooting complex issues while collaborating with support, engineering, and sales. Core tech: Python, Java, Bash, microservices with Istio.
A 6-month contract in Warsaw developing and supporting Sungard/FIS Front Arena trading applications — extending and integrating the core Front Arena architecture, building integrations with trading and back-office systems, and supporting Trading Manager outputs like overnight risk and Mark-to-Market. Core stack: Front Arena languages (ADFL, ACM, AEL, ASQL) and Python.
Junior engineer on Splunk's Quality Interfaces team in Kraków, building internal services, APIs, data-collection jobs, and tools that surface software quality signals for Splunk engineering teams. Day-to-day involves coding in Python or Go, writing tests, documentation, debugging, and supporting releases with mentorship.
Senior Test Automation Engineer in Warsaw (via DCG recruitment agency) who analyzes requirements, designs test scenarios and cases, executes tests, and builds automation for daily tasks. Core stack: Java or Python, BDD tools (Robot Framework, JBehave, Cucumber), Jenkins/CI-CD, Git, databases/big data, Linux and bash.
Senior Test Automation Engineer in Warsaw who prepares test scenarios and cases, implements automation for daily tasks, executes test plans, and analyzes results and defects. Core stack: Python or Java, BDD tools (Robot Framework, JBehave, Cucumber), Git, Jenkins/CI-CD, and Linux/bash.
Senior Test Automation Engineer working hybrid from Gdynia, Poland: building test scripts, automating tasks, and reporting results. Role requires experience with Python or Java and working with databases; offered on a B2B contract paying up to 130 PLN/h net plus sports card and private healthcare.
Senior fullstack engineer on a cross-functional ALTEN Polska team in Kraków: break business requirements into user stories, deliver features to production, and maintain the system while managing technical debt. Core stack is Java and Python with Spring, plus PostgreSQL and MongoDB; ML/AI experience is a plus.
Senior backend engineer building production-grade AI/GenAI solutions in Python — LLM apps, RAG pipelines and agentic workflows — integrated with an existing Java enterprise ecosystem, with strong emphasis on security, testing and AI governance. Hybrid role based at a client's Kraków office 6-8 days a month; requires 4+ years in Python and Java.
Builds production-grade AI/GenAI features — LLM apps, RAG pipelines, and agentic workflows — primarily in Python for a large enterprise transformation, integrating securely with an existing Java-based ecosystem. Needs 5+ years of backend engineering, microservices/API and database experience, and cloud skills (Azure preferred); hybrid from the Kraków office.
Senior SRE/software developer on Citi's Developer Services Team in Warsaw, applying DevOps/SRE practices to automate manual processes, integrate AI tools, and migrate services to SaaS. Works in an agile setting with CI/CD, Python, Java, and Docker to improve resiliency of global financial platforms.
Backend engineer on Cisco's CX Platform team in Kraków, designing and building scalable cloud-native backend services for global customers using Java or Python on AWS, while mentoring junior developers and collaborating with international teams on end-to-end delivery.
Responsibilities: Design, develop and maintain scalable enterprise applications and services using Java and Python. Build and support APIs, integrations and backend services connecting enterprise and manufacturing…
HeadHR in Kraków, Poland is seeking a Software Engineer or AI Developer to design, develop, and maintain AI-powered software applications using Python. You will build and enhance microservices that support AI-driven…
Looking for dynamic projects with modern tech and room to grow? We are Clouds on Mars, an IT consulting company specializing in architecting and delivering solutions that exceed current technological and domain…
Fancy helping to shape the future of FinTech? We have always been innovators. In 1996 we were the first company to share exchange rate information, free of charge on the internet. Today, we are a world leading online…
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