Open source developer jobs in Poland

 ...data backbone of Wikimedia projects and a key part of the global open knowledge ecosystem. You’ll help scale and sustain the Wikidata...  ...Wikidata Platform services with other systems and data sources across Wikimedia Collaborate with SRE, data engineers, and product... 

 ...role demands a seasoned distributed systems developer who can deal thoughtfully with...  ...time remote-first operational parameters open exclusively to qualified backend engineers...  ...or refactoring highly complex inherited source codebases. What We Offer The exceptional... 

 ...highly analytical, systems-minded Middle Java Developer to join our expanding back-end...  ...Hibernate and managing workflows inside source control configurations. ~ Familiarity managing...  ...-time remote-first operational framework open exclusively to qualified software... 

 ...product that connects creative communities and opens up worlds of opportunities. Working in...  ...be the primary architect of our data’s "source of truth." You will lead a team of high-...  ...always ready to help. Opportunity to develop in an international environment - we have... 

 ...proactive, consistent, and dependable over time Tech Stack Next.js Python NodeJs Pytorch OpenAI / Anthropic / open-source LLMs SQL & noSQL Kubernetes Docker How We Work The best products today in the world were built by small, world class... 

 ...community wikis, Fandom is the global number one source for in-depth information on pop culture,...  ...Trailers. Fandom equips high-agency developers with an uncompromised software canvas to...  ...mentor junior developers to foster an open, knowledge-sharing technical squad. Agile... 

 ...-Grade AI Systems Architecture: Design, develop, and scale advanced AI-driven backend services...  ...product consulting. Mandatory Field Sourcing Experience: Proven, hands-on history...  ...engineering nodes. Location Context: Position open exclusively to qualified software... 

 ...The platform provides high-agency backend developers with an uncompromised remote canvas to...  ...international teams. Location Context: Position open exclusively to qualified full-stack and...  ...(GCP). Familiarity with event sourcing models, asynchronous event message... 

 ...product incubator, growth marketing tech developer, and elite automated systems provider operating...  ...full-time remote engagement framework open to builders across the US, UK, and Europe...  ...side-projects, contributing to open-source agent frameworks, or engaging inside cutting... 

 ...Technology Team under a permanent, full-time remote configuration open across Europe (including Warsaw, Poland hubs). In this high-...  ...professional software engineering history operating as a Backend Developer, Systems Engineer, Node.js/Python Specialist, API Integration... 

 ...centralized Edge Network division in a full-time remote capacity open exclusively to qualified technical engineering leaders resident...  ...server provisioning fluidly natively using DevOps pipelines, develops low-overhead operational tooling smoothly natively using Python... 

 ...other Fraud Engineering teams. You will own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery. You will design and implement real-time fraud... 

 ...team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout...  ...your team through your writing and tech talks. You will help develop talent on your team by providing feedback and guidance, and... 

 ...Building the Future of Open Finance Payward - the parent company behind Kraken, NinjaTrader, Breakout, xStocks, Payward Services and...  ...behaviour to guide what we build next. The opportunity Design, develop, and maintain high-quality consumer-facing features across web (... 

 ...design data integrations, data quality frameworks and design and evaluate open source/vendor tools for data lineage Work closely with Dropbox business units and engineering teams to develop strategy for long term Data Platform architecture to be efficient, reliable... 

 ...The exchange team develops and maintain a cutting-edge trading platform. With a global presence across APAC, EMEA and North America, the team has since grown with the goal to provide a seamless and secure trading experience for our clients. As a Senior Devops Engineer... 

About Nethermind Nethermind is a blockchain research and software engineering company building high-performance infrastructure, security tooling, and cryptographic systems across the Ethereum ecosystem and beyond. We work closely with protocol teams, L2s, and ZK projects...

Job Title: Cloud Infrastructure Engineer Location: Remote, Poland Type: Contract Duration: 6 Months (Further Extendable) Our client is on a mission to revolutionize the way we work by offering an innovative platform for seamless, secure collaboration...

 ...based, relationship-aware retrieval across the organization's data sources, enabling multi-hop queries and letting agents accumulate...  ...platform API surface, translating infrastructure primitives into developer-ready abstractions. Building reference agent implementations... 

 ...overcoming complex IT challenges through tailor-made software development and data-driven solutions. Softeta is looking for a Java Developer to become a part of our vibrant team and will be work for our client from banking sector. Responsibilities: Implement and... 

 ...Join Checkly as a Senior Customer Solutions Engineer and empower developers and agents to own and ensure application performance and reliability - from pull request to post-mortem! Checkly is the active reliability layer for developers and agents. We unify testing,... 

Facets Developer – C# and SQL for agile development for a Facets implementation role. This Developer position will participate in a team environment for the delivery and code for a Facets testing and implementation. Responsible for programming, debugging and testing of... 

Altoros - a leading IT services provider is looking for a **Unity Support Engineer. **!Part-time position. Responsibilities: Regularly review Unity SDK release notes on a monthly basis and: Identify and flag breaking changes that may impact integration with...

About Nethermind Nethermind is a blockchain research and software engineering company building high-performance infrastructure, security tooling, and cryptographic systems across the Ethereum ecosystem and beyond. We work closely with protocol teams, L2s, and ZK projects...

 ...customers onto our AI platform, we’re facing challenges that sit at the intersection of infrastructure, application architecture, developer experience, and enterprise clients’ requirements. These problems are rarely well-defined upfront, there’s never a single way to solve... 

About WearLinq: WearLinq is a groundbreaking healthcare startup emerging from Stanford University on a mission to democratize healthcare. We built an FDA-cleared 6-channel EKG wearable device and mobile app that bridges the gap between patients and providers to diagnose...

 ...quality by testing new features, identifying defects, creating automated tests, recommending process and product improvements, and developing strong feature and product knowledge. Key Responsibilities Perform thorough functional, integration, API, regression, and... 

 ...About This Role We are looking for a Senior Shopify Full Stack Developer with deep expertise in the Shopify ecosystem, a strong grasp of headless architecture, and experience leading enterprise-scale development initiatives. You'll be responsible for building scalable... 

 ...Engineer Fullstack to become a part of our vibrant team and will be work for our client from banking sector. Responsibilities: Develop and maintain scalable frontend applications using React 19 and TypeScript . Build and optimize applications within a Turbo monorepo... 

 ...risk teams and other engineering teams , you will effectively manage loans throughout the delinquency phase of their lifecycle and develop and implement recovery strategies. We are looking for a highly motivated software engineer to build the next generation platform solutions...