TTT - GenAI - Senior

At EY, you’ll have the chance to build a career as unique as you are, with the global scale, support, inclusive culture and technology to become the best version of you. And we’re counting on your unique voice and perspective to help EY become even better, too. Join us and build an exceptional experience for yourself, and a better working world for all.

Generative AI – Application Developer (.NET)

EY’s GDS Tax Technology team’s mission is to develop, implement and integrate technology solutions that better serve our clients and engagement teams. As a member of EY’s core Tax practice, you’ll develop deep technical expertise and strong application development skills focused on Generative AI–powered solutions.

Ever-increasing regulations require tax departments to gather, organize and analyze more data than ever before. Generative AI is enabling new ways to transform how this data is processed, interpreted, and delivered. EY’s GDS Tax Technology team works side-by-side with partners, clients, and tax technical subject matter experts to build scalable, secure, and reliable AI-enabled platforms that drive measurable business value.

GDS Tax Technology provides solution architecture, application development, testing, and maintenance support to the global Tax service line across multiple domains.

The opportunity

We’re looking for Tax Seniors with 6–8 years of experience in .NET application development and Generative AI technologies to join the TTT team in Tax Service Line. The role requires a strong balance of hands-on development and technical oversight, contributing to the evolution of GenAI frameworks and domain-specific implementations within enterprise environments.

Your key responsibilities

• Provide technical oversight for the evolution of the Generative AI framework and domain-specific AI implementations.
• Ensure scalability, security, performance, and reliability of AI-powered solutions.
• Establish best practices for prompt engineering, LLM cost optimization, and caching strategies.
• Design, develop, and implement Generative AI–enabled applications, APIs, AI agents, and interfaces using the .NET ecosystem.
• Guide integration with enterprise GenAI platforms including Azure AI Foundry, Azure OpenAI, and GitHub Models.
• Estimate technical efforts and collaborate with stakeholders.

Skills and attributes for success

Must-Have

• Strong experience in .NET (C#, ASP.NET Core, Blazor).
• Strong understanding of Generative AI and LLM technologies.
• Experience with AI agent frameworks and orchestration.
• Hands-on knowledge of ClosedXML, Roslyn, System.Text.Json.
• Strong Azure cloud experience.

Nice-to-Have

• Vector databases and RAG exposure.
• Azure AI Search, M365 Copilot Studio.
• Azure AI certifications.

Behavioural Skills

• Excellent learning ability.
• Strong communication skill.
• Flexibility to work both independently and as part of a larger team.
• Strong analytical skills and attention to detail.
• The ability to adapt your work style to work with both internal and client team members.

To qualify for the role

Bachelor’s or Master’s degree in Computer Science or related field.

6–8 years of relevant experience.

What we offer

EY Global Delivery Services (GDS) is a dynamic and truly global delivery network. We work across six locations – Argentina, China, India, the Philippines, Poland and the UK – and with teams from all EY service lines, geographies and sectors, playing a vital role in the delivery of the EY growth strategy. From accountants to coders to advisory consultants, we offer a wide variety of fulfilling career opportunities that span all business disciplines.

In GDS, you will collaborate with EY teams on exciting projects and work with well-known brands from across the globe. We’ll introduce you to an ever-expanding ecosystem of people, learning, skills and insights that will stay with you throughout your career.

Continuous learning:You’ll develop the mindset and skills to navigate whatever comes next.

Success, as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.

Transformative leadership:We’ll give you the insights, coaching and confidence to be the leader the world needs.

Diverse and inclusive culture:You’ll be embraced for who you are and empowered to use your voice to help others find theirs.

EY | Building a better working world

EY exists to build a better working world, helping to create long-term value for clients, people and society and build trust in the capital markets.

Enabled by data and technology, diverse EY teams in over 150 countries provide trust through assurance and help clients grow, transform and operate.

Working across assurance, consulting, law, strategy, tax and transactions, EY teams ask better questions to find new answers for the complex issues facing our world today.