Senior Developer

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Job Type: Permanent
Location: Letterkenny, Co. Donegal – Hybrid, 2 - 3 days per week in office


Can you design, create and maintain applications and software?
Ready to join a leading IT consultancy where you will the autonomy to shape your career?

Make a meaningful impact as a Senior Developer at TCS!

Join a global tech leader right here in Donegal. 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. With over 850 employees and a state-of-the-art global delivery centre, we’re proud to offer world-class career opportunities without having to leave the Northwest. Recognised as Workplace of the Year by the Letterkenny Chamber, we foster a culture of continuous learning, innovation, and respect. Our people are at the heart of everything we do – collaborating across teams, geographies, and disciplines to drive real change for clients around the world. Be part of something global, grounded in Donegal.

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.

• Collaborate with leading lights of industry
• Gain access to endless learning opportunities
• Shape the future of TCS

The Role
We are seeking a Senior Developer with deep expertise in application and back-end development with a passion for building innovative solutions. This is an exciting opportunity to work on industry-leading products and platforms, where you’ll design, develop, and maintain robust, scalable systems that power transformative digital experiences.
If you thrive in dynamic environments and are eager to shape the future of enterprise technology, join us to make a meaningful impact through your technical leadership and ambition.

Key Pillars:
Back End Focus: The role focuses on server-side logic, database management, API development, and integration with front-end components, ensuring high performance and reliability for enterprise applications.
Technical Breadth: Candidates should demonstrate mastery in languages such as Scala, Java and cloud platforms like AWS, with a proven track record in scaling systems and driving architectural decisions.
Innovative Solutions: The position supports the development of cutting-edge products and platforms, fostering a culture of innovation and continuous improvement.

Outline of Responsibilities:

• Collaborate with cross-functional teams of engineers, product managers, and designers.
• Build scalable, performant, and resilient backend systems that support critical business needs.
• Participate in system design and architecture reviews to influence technical direction.
• Drive software quality through code reviews, testing, and continuous integration.
• Contribute to a positive and inclusive engineering culture through mentorship, knowledge sharing, and leadership at your level.
• Investigate and resolve complex technical issues in production environments.
• Author and review technical design documents, RFCs, and root cause analyses.
• Continuously learn and grow in your engineering craft and domain knowledge.

Your Profile
Key skills/knowledge/experience:

• Primary tech stack - Scala, Java, AWS experience.
• Strong level of professional experience in a similar role.

• Recognised technical authority with the ability to influence system architecture across teams or domains.
• Track record of delivering high-impact projects with significant architectural ownership.
• Mastery of multiple languages and paradigms; able to guide complex trade-offs and tech decisions.
• Extensive experience scaling systems to handle high throughput and low latency.
• Strong ability to mentor, elevate peers, and lead cross-team technical initiatives.
• Proven experience driving quality, reliability, and operational excellence at scale.
• Strategic thinking with the ability to align technical direction with company goals.
• Thought leadership in areas like distributed systems, functional programming, or cloud-native architecture.

Desirable skills/knowledge/experience:

• Secondary tech stack - Solid experience in Golang, Python
• Deep operational knowledge of AWS, including cost-aware system design.
• Contributions to engineering culture, hiring, or organisational development.

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 us at 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 us at UKI.Recruitment@tcs.com with the subject line: “Adjustment Request” or email fiona.harvey@tcs.com 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 tto 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.