Senior Software Engineer

Location: Nationwide (Letterkenny GDC Base) hybrid policy with some travel to Letterkenny, Co Donegal / Customer site in Dublin

Senior Software Engineer

We are seeking a Senior Software Engineer with deep expertise in application and back‑end development. With a passion for building innovative solutions, this role will design, develop and maintain robust, scalable systems that power transformative digital experiences. The position focuses on server‑side logic, database management, API development and integration with front‑end components, ensuring high performance and reliability for enterprise applications.

• 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.
• Participate in an on‑call rotation to ensure swift resolution of any production outages involving your systems.

• 5+ years of professional experience.
• Expert‑level fluency in at least one programming language and strong system design skills.
• Experience leading the design, development and operation of complex distributed systems in a modern cloud provider.
• Deep knowledge of REST API design, scalability, fault tolerance and performance optimisation.
• Demonstrated ability to own projects end‑to‑end and mentor junior engineers.
• Significant experience with production infrastructure, observability and incident management.
• Strong collaboration and communication skills across disciplines and teams.
• Clear understanding of engineering best practices and architectural principles.

• Deep familiarity with AWS cloud services across compute, storage and serverless.
• Experience defining and evolving team‑wide coding standards and operational practices.
• Expertise in Scala and/or functional programming patterns.

Competitive salary, pension, healthcare, life assurance, laptop and access to extensive training resources and discounts, health & wellness initiatives and sports events.

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 and 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. xcfaprz Please email us at if you would like to opt in. If you need an adjustment to the application process or interview, contact with the subject line "Adjustment Request".