Ireland Network Engineer jobs in Dublin, County Dublin

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

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
We are seeking a QA Engineer with strong expertise in Blockchain technologies to ensure the quality, security, and reliability of blockchain-based applications. The ideal candidate will have hands-on experience testing blockchain networks, smart contracts, and decentralized applications (DApps), along with a solid understanding of blockchain operations.

Your responsibilities:
Agile Facilitation & Delivery Excellence

• Design, develop, and execute test strategies, test plans, and test cases for blockchain-based systems.
• Perform functional, integration, system, regression, and performance testing of blockchain platforms and DApps.
• Validate smart contracts for correctness, security vulnerabilities, gas optimization, and compliance with business logic.
• Test blockchain operations including node setup, network configurations, consensus mechanisms, and transaction lifecycle.
• Conduct API testing for blockchain services and integrations with off-chain systems.
• Identify, log, track, and verify defects using defect management tools.
• Collaborate closely with blockchain developers, architects, and DevOps teams throughout the SDLC.
• Participate in security testing, including vulnerability assessment and basic penetration testing for smart contracts.
• Support UAT, production validation, and post-deployment monitoring.
• Ensure adherence to quality standards, best practices, and regulatory requirements (where applicable).

Essential skills/knowledge/experience:

• Strong experience in QA / Software Testing with focus on Blockchain technologies.
• Hands-on experience testing smart contracts (e.g., Solidity, Vyper).
• Knowledge of major blockchain platforms such as:
  • Ethereum / Polygon / BSC / Hyperledger Fabric / Corda (any one or more)
• Experience with blockchain testing tools such as:
  • Truffle, Hardhat, Ganache, Remix, Foundry (or similar)
• Experience with API testing tools (Postman, REST clients).
• Familiarity with CI/CD pipelines and DevOps practices.
• Bachelor’s or Master’s degree in computer science, Engineering, or related field.

Desirable skills/expertise

• Blockchain certifications or formal training will be an added advantage.
• BFSI Industry experience a bonus.
• Knowledge of test automation frameworks.

Rewards & Benefits
TCS is consistently voted 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 UKI.Recruitment@tcs.com if you would like to opt in.

If you are an applicant who needs any adjustments to the application process or interview, please contact UKI.Recruitment@tcs.com with the subject line: “Adjustment Request” or email to request an adjustment. We welcome requests prior to you completing the application and at any stage of the recruitment process.

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 UKI.Recruitment@tcs.com 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.

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