Senior Solidity & Ethereum Engineer

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world.

YOUR ROLE

We are seeking an experienced Solidity & Ethereum Engineer who can architect, develop, and optimize smart contracts and private Ethereum network infrastructure. The ideal candidate has hands-on experience with Azure, DevOps practices, and modern blockchain development tools. This role involves both strategic problem solving and practical engineering execution.

YOUR TASKS

• Design, develop, and optimize Solidity smart contracts for private Ethereum networks.
• Tune and optimize Ethereum node configurations for performance, efficiency, and reliability.
• Build and maintain CI/CD pipelines using Azure DevOps.
• Work with Azure Cloud infrastructure to deploy, manage, and monitor blockchain components.
• Collaborate with cross-functional teams to solve complex engineering problems and deliver high-quality solutions
• (Optional/Preferred) Integrate or develop components using Hyperledger FireFly.
• Contribute to architectural decisions and best practices for secure, scalable blockchain systems.

YOUR PROFILE

• You have strong, proven experience with Solidity and Ethereum development;
• You have hands-on knowledge of private Ethereum network optimization;
• You have practical experience with Azure Cloud services and Azure DevOps pipelines;
• You have excellent problem-solving skills and are able to work effectively in a collaborative environment;
• You have a strong understanding of blockchain fundamentals, smart contract security, and Ethereum tooling;
• You speak English fluently;
• You are committed and able to work in a team, with the willingness to develop and learn.

Preferred Qualifications

• Experience with Hyperledger FireFly or similar blockchain orchestration frameworks.
• Background or interest in finance, fintech, or decentralized financial systems.
• Familiarity with enterprise-grade cloud deployment, monitoring, and automation.

What You'll Love About Working Here

• Enjoy hybrid working model that fits your life - after completing onboarding, connect work from a modern office with ergonomic work from home thanks to home office package (including laptop, monitor, and chair). Ask your recruiter about the details.
• Access to over 70 training tracks with certification opportunities (e.g., GenAI, Architects, Google) on our NEXT platform. Dive into a world of knowledge with free access to Education First languages platform, Pluralsight, TED Talks, Coursera and Udemy Business materials and trainings.
• Practical benefits: private medical care with Medicover with additional packages (e.g., dental, senior care, oncology) available on preferential terms, life insurance and 40+ options on our NAIS benefit platform, including Netflix, Spotify or Medicover Sport. 

GET TO KNOW US

Capgemini is committed to diversity and inclusion, ensuring fairness in all employment practices. We assess people based on qualifications and performance, not personal characteristics, striving to create a workplace where everyone can succeed and feel valued.

Want to get to know us better? Check out our Instagram — @capgeminipl or visit our Facebook profile — Capgemini Polska. You can also find us on YouTube!

About Capgemini

Capgemini is a global business and technology transformation partner, powered by AI and delivering tangible business value to organizations around the world. It helps clients not only imagine a better future but make it a reality through the power of technology, AI, and human potential. As a responsible and diverse organization with nearly 60 years of history, it employs more than 420,000 people in over 50 countries. Capgemini delivers end-to-end services and solutions, from strategy and design to engineering and operations, drawing on deep industry expertise and a broad partner ecosystem. In 2025, the Capgemini Group reported global revenues of €22.5 billion.