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Job Type: Permanent
Location: Letterkenny GDC, Co. Donegal (Hybrid – minimum 3 days onsite per week)

Do you have a proven track record in Python and SQL?
Are you keen to future proof your career in the Data Engineering space with a leading global IT organisation?

Make your mark at TCS as a Data Engineer!

Join a global tech leader right here in Donegal. 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.

• Join a leading global IT services organisation.
• Be part of an exciting team where you will be challenged every day.
• Gain exposure to innovative technology.

The Role
We are seeking an experienced Data Engineer to join our team and contribute to the design, development, and ongoing support of data provisioning and ingestion solutions. The role requires strong core Python experience with an object-oriented programming focus, solid application-level SQL development skills, and the ability to work across Python and Java based systems. This position focuses on the practical delivery of data ingestion, transformation, and optimisation to support analytics and reporting use cases.

Key Responsibilities:
Data Provisioning and Engineering

• Design, build, and maintain data provisioning and ingestion pipelines supporting business‑critical applications.
• Develop and enhance Python‑based solutions using strong object‑oriented design principles for data processing, transformation, and automation.
• Build, optimise, and support data transformations using Python and application‑level SQL to ingest and integrate data from multiple structured and semi‑structured sources.
• Work with relational databases (e.g. SQL Server, PostgreSQL, MySQL) to query, transform, validate, and optimise data across enterprise systems.
• Support and maintain existing on‑prem data pipelines, ensuring stability, accuracy, performance, and operational reliability.
• Analyse data issues, perform root‑cause analysis, and implement robust fixes, data quality checks, and safeguards.
• Collaborate with application teams working in Java‑based systems, contributing to data provisioning solutions that span both Python and Java environments.

Solution Delivery & Continuous Improvement

• Contribute to architectural modernisation and continuous improvement initiatives within an Agile delivery environment.
• Monitor, troubleshoot, and optimise data pipelines to ensure performance, reliability, and maintainability.
• Document data models, workflows, and engineering processes to support transparency, knowledge sharing, and long‑term support.

Your Profile
Essential skills/knowledge/experience:

• Bachelor’s degree in computer science, data engineering, or related field.
• Strong core Python experience with a clear understanding of object-oriented programming concepts.
• Proven experience developing and supporting data ingestion or data provisioning pipelines.
• Strong application-level SQL development skills, including complex queries, joins, and performance considerations.
• Experience working with relational databases such as SQL Server, PostgreSQL, or MySQL.
• Good understanding of data quality, validation, and operational support processes.
• Experience working in Agile delivery environments.
• Strong analytical, problem-solving skills
• Excellent communication and stakeholder engagement skills.

Desirable skills/knowledge/experience:

• Java development experience, particularly within enterprise or backend application environments.
• Experience working across both Python and Java-based systems.
• Familiarity with Finance / Investment industry data domains.
• Exposure to modernization or cloud migration initiatives.

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, phone, 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.

Diversity, Inclusion and Wellbeing
Tata Consultancy Services UK&I is committed to meeting the accessibility needs of all individuals in accordance with the UK Equality Act 2010 and the UK Human Rights Act 1998.

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”. 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.

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