Senior Consultant - Full-stack Developer - DE - Technology Consulting - UKI - Belfast

Ernst & Young Advisory Services Sdn Bhd; Belfast City District; On-site; GBP 80,000 - 110,000; Full time

Benefits offered by this job

Flexible working

Career development

Total Rewards package

Job summary

EY Belfast is actively growing its Digital Engineering team and expanding full-stack engineering capability. This is a fantastic opportunity for a senior developer who combines hands-on delivery with technical leadership, mentorship, and ownership of complex systems. Ready to learn new technologies and lead teams, you will shape end-to-end product delivery.

You will collaborate with product teams, design scalable APIs, and drive best practices in a fast-paced, agile environment.

Qualifications

• Strong leadership and technical decision‑making ability.
• Excellent problem‑solving skills with a proactive approach.
• Confident communicator with stakeholders.
• Mentor mindset to develop others.

Responsibilities

• Actively participate and own the design, development and delivery of full stack products from UI to backend databases.
• Build and maintain responsive UI using React, Angular or Vue.
• Design and implement robust APIs and services with security and reliability.
• Collaborate with product teams to translate complex requirements into technical solutions.
• Present features and solutions to stakeholders and clients.
• Perform thorough peer code reviews and maintain engineering standards.
• Support non-functional improvements including technical debt reduction and API documentation.
• Provide mentorship to junior developers and promote engineering excellence.

Skills

Full stack development

Backend development

APIs & distributed systems

Relational databases

Testing frameworks

Agile, cross-functional teams

Cloud platforms (AWS, Azure, GCP)

DevOps / CI-CD

NoSQL databases

Tools

React

Angular

Vue

Job description

Senior Consultant - Full-stack Developer - DE - Technology Consulting - UKI - Belfast

Location: Belfast

Other locations: Primary Location Only

Date: 7 Sept 2026

Requisition ID: 1634254

At EY, we’re all in to shape your future with confidence.

We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go.

Join EY and help to build a better working world.

Senior Full-Stack Developer - Technology Consulting – Belfast

In Digital Engineering we shape, concept and build innovative solutions that address the most important issues and opportunities for our clients. Our consultants work in agile, cross-functional teams addressing some of most significant issues facing society today, such as transition to sustainable energy, digitisation of government, scaling high-growth businesses, exploiting the potential of AI and improving wellness with digital healthcare.

The core capabilities of our team include:

• Digital strategy, horizon scanning, and strategic planning. Working in combined teams with Business Designers, Researchers, Strategists, Industry and Functional Specialists, we develop a vision, roadmap and case for change to address fundamental issues facing our clients, such as “how can we grow?”, “how do we respond to disruption?” and “what can we do next?”
• Digital technology delivery management. Using principles of lean start-up and agile, we manage large-scale delivery programmes that include custom software and SaaS solutions, using an ecosystem of EY, client and partner agency resources. We have a range of skills across programme management, solution architecture, product management, business analysis and delivery management,

As a technology specialist, EY offers you the opportunity to apply your skills in a highly strategic context, working on meaningful and impactful solutions that build a better working world. EY is a leader in Business Transformation services and the Digital Engineering team is rapidly growing to enable us to deliver more of our technology work. This is an exciting time for new joiners who will have many opportunities to make their mark on the business and accelerate their personal and professional growth.

The opportunity

EY is actively growing our Digital Engineering team in Belfast and is expanding our full-stack engineering capability. This is a fantastic opportunity for a highly capable developer who is ready to operate at a senior level, combining hands‑on delivery with technical leadership, mentorship, and ownership of complex systems. We are looking for someone who is ready to challenge themselves by learning new technologies, lead developer teams and understand a product from end to end.

Your key responsibilities

• Actively participate and own the design, development and delivery of full stack products from user interfaces through to the supportive backend databases
• Build and maintain responsive, high-quality user interfaces using modern frameworks such as React, Angular or Vue.
• Design and implement robust APIs and services, ensuring security, reliability and maintainability.
• Work closely with product teams to understand complex business requirements and translate them into technical solutions.
• Present delivered features and technical solutions confidently to stakeholders and clients.
• Perform thorough peer code reviews, providing constructive feedback and maintaining high engineering standards.
• Support and lead non-functional improvements, including technical debt reduction, performance optimisation and creation of clear API documentation.
• Provide technical mentorship and guidance to junior developers, promoting a culture of continuous improvement and engineering excellence.

Skills and attributes for success

• Strong professional full stack development experience, with increasing levels of responsibility.
• Strong backend development experience using Node.js, Java, Python, .NET or similar technologies.
• Proven ability to design and build scalable APIs and distributed systems.
• Solid experience with relational databases such as PostgreSQL or MySQL.
• Experience with testing frameworks, unit testing, integration testing and automated testing strategies.
• Strong understanding of software development best practices, system design, maintainability and code quality.
• Experience working in agile, cross-functional teams and contributing to delivery planning and estimation.
• Experience with cloud platforms such as AWS, Azure or GCP, CI/CD pipelines or DevOps practices would be beneficial.
• Exposure to NoSQL databases, microservices or event-driven architectures would be desirable.

To qualify for the role, you must have

• Strong leadership and technical decision‑making ability.
• Excellent problem‑solving skills with a proactive approach to challenges.
• Confident communicator, able to engage with both technical and non-technical stakeholders.
• A mentor mindset with a passion for developing others and raising team capability.
• High level of ownership, accountability and attention to detail.

What we look for

We’re interested in candidates who can take end‑to‑end ownership of complex features and systems, balancing hands‑on engineering with technical leadership. You should bring a strong voice in shaping how the team builds, delivers and scales software, with a proven ability to improve code quality, team processes and system architecture. If you’re serious about joining Digital Engineering and ready to help deliver meaningful, scalable solutions for our clients, this role is for you.

What working at EY offers

We offer a competitive remuneration package where you’ll be rewarded for your individual and team performance. Our comprehensive Total Rewards package includes support for flexible working and career development, and with FlexEY you can select benefits that suit your needs, covering holidays, health and well‑being, insurance, savings and a wide range of discounts, offers and promotions. Plus, we offer:

• Support, coaching and feedback from some of the most engaging colleagues around
• Opportunities to develop new skills and progress your career
• The freedom and flexibility to handle your role in a way that’s right for you