Senior Blockchain Java Developer

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Job Type: Permanent

Job Location: Dublin – IFSC (Customer Site, fully onsite)

Do you have deep backend engineering expertise, strong understanding of decentralized architectures, and the ability to translate business requirements into secure, scalable technical solutions?

Join TCS as a Senior Blockchain Java Developer!

Careers at TCS: It means more

TCS is a purpose-led transformation company, built on belief. We do not just help businesses to transform through technology. We support them in making a meaningful difference to the people and communities they serve - our clients include some of the biggest brands in the UK and worldwide. For you, it means more to make an impact that matters, through challenging projects which demand ambitious innovation and thought leadership.

• Work on mission‑critical transformation programmes that combine cutting‑edge technology with real‑world impact—helping global organisations build trust, resilience, and long‑term value.
• Be empowered to challenge convention and lead with ideas, contributing to innovative solutions that shape industries while upholding strong ethical and sustainability principles.
• Your work directly supports people, communities, and society, allowing you to grow your career while being part of a company driven by purpose, belief, and responsible innovation.

The Role

As a Senior Blockchain Java Developer, you will be responsible for designing and delivering robust backend systems that integrate enterprise‑grade Java platforms with blockchain and distributed ledger technologies.

You will play a key role in shaping system architecture, ensuring reliability, and driving engineering best practices across the development lifecycle.

Your responsibilities:

• Design, develop, and maintain scalable backend services using Java and modern microservices architecture.
• Build and integrate blockchain‑enabled components, including interaction with distributed ledgers, smart contracts, and transaction workflows.
• Develop secure, high‑performance RESTful APIs for internal and external system integration.
• Ensure security, data integrity, and consistency across on‑chain and off‑chain systems.
• Contribute to system architecture, performance optimization, and reliability in distributed environments.
• Collaborate with product owners, frontend developers, DevOps, and QA teams in Agile/Scrum delivery models.
• Provide technical guidance, conduct code reviews, and mentor junior engineers to uphold engineering standards.

Your Profile

Essential skills/knowledge/experience:

• Strong hands‑on experience in Java (8 or above) and backend development.
• Proven experience with Spring Boot, microservices architecture, and REST API design.
• Solid understanding of blockchain fundamentals, including distributed ledgers, consensus mechanisms, and transaction models.
• Experience integrating backend systems with blockchain platforms (e.g., Ethereum, Hyperledger, or similar).
• Good knowledge of application security, cryptography basics, and secure coding practices.
• Experience working with relational and/or NoSQL databases.
• Strong problem‑solving skills and experience working in Agile development environments.

Desirable skills/knowledge/experience:

• Hands‑on experience with smart contracts and blockchain frameworks or SDKs.
• Exposure to cloud‑native development, containerization, and orchestration tools (e.g., Docker, Kubernetes) and advantage.
• Experience with CI/CD pipelines, DevOps practices, and automated testing is desirable.
• Knowledge of event‑driven architectures, messaging systems, or distributed systems design.
• Background in BFSI, fintech, or enterprise platforms with high security and scalability requirements are advantageous.
• Prior experience in technical leadership, solution design, or architecture roles is preferable.

Rewards & Benefits

TCS is consistently voted as a Top Employer in the UK and globally. Our competitive salary packages feature pension, health care, life assurance, laptop and access to extensive training resources and discounts within the larger Tata network.

We offer health & wellness initiatives and sports events; we are the proud sponsor of the London Marathon and partner with our local communities in Ireland.

Diversity, Inclusion and Wellbeing

Tata Consultancy Services UK&I is committed to meeting the accessibility needs of all individuals in accordance with the Ireland Employment Equality Acts 1998-2011 (as amended) and the Equal Status Acts 2000-2012 (as amended).

We welcome and embrace diversity in race, nationality, ethnicity, disability, neurodiversity, gender identity, age, physical ability, gender reassignment, sexual orientation. We are a disability inclusive employer and encourage disabled people to apply for this role.

As a Disability Confident Employer, we offer an interview to applicants with disabilities or long-term conditions who meet the minimum criteria for the role. Please email [email protected] if you would like to opt in.

If you are an applicant who needs any adjustments to the application process or interview, please contact us at [email protected] with the subject line: “Adjustment Request” or email [email protected] to request an adjustment. We welcome requests prior to you completing the application.

Beware of Fraudulent offers

This is to notify you that TCS does not ask for any sort of payment or security deposit from candidates at any stage of the recruitment process. The firm never sends out job offers from free internet email services like Gmail, Yahoo Mail, and so on. TCS has not authorised any third-party company to collect money on their behalf. As a vigilant job seeker, beware of fraudulent recruitment activity and protect your interests! You can write to [email protected] to report any fraudulent activity.

Due to the high volume of applications, we will be unable to contact each applicant individually on the status of their application. If you have not received a direct response within 30 days, then it should be deemed unsuccessful on this occasion.

Join us and do more of what matters. Apply online now.