Senior Software Developer

Within the Tax & Law service line, the Tax Technology Office architects and operates a unified technology, data and AI ecosystem that accelerates innovation without compromising trust. You work on both client missions in AI and technology, helping organizations move beyond pilots into industrialized, auditable solutions, and on internal business-critical platforms that reshape the way our own Tax & Law service line operates, always with governance embedded by design rather than bolted on afterwards. From identification to deployment, measured in time saved, quality improved and value created. Depending on your interests and background you can specialize in Solution Development & Service Management, Innovation & Adoption, Technology Legal & Compliance, or Go-to-Market.

Shape the future with confidence.

The Opportunity: Your Next Adventure Awaits?

As a Developer within the Tax Technology Office, you will play a pivotal role in building and safeguarding the platforms that power Tax & Law's technology ecosystem. You will help ensure that our business-critical applications remain scalable, secure and maintainable while reducing dependency on individual experts and establishing engineering excellence across the team.

You will combine hands-on development with technical leadership, helping shape architecture decisions, coaching colleagues and driving best practices that enable sustainable growth.

Your Key Responsibilities

• Design, develop and maintain enterprise-grade applications and platforms.
• Define and challenge technical standards, coding practices and architectural decisions.
• Lead complex development initiatives from design through deployment.
• Coach and mentor junior developers through day-to-day collaboration and code reviews.
• Ensure critical knowledge is documented and shared across the team.
• Improve platform reliability, security and maintainability.
• Drive DevOps, CI/CD and cloud-native engineering practices.
• Work closely with business stakeholders to balance speed, quality and long-term sustainability.
• Collaborate with global EY teams and contribute to strategic technology decisions.
• Explore how AI and emerging technologies can improve software delivery and business outcomes.

Your Profile 

• You hold a Bachelor's or Master's degree in IT, Computer Science, Software Engineering or a related discipline.
• You have 3-5 years of experience building and maintaining business-critical applications.
• You are highly proficient in .NET / C#, REST APIs and modern application architecture.
• You have experience with front-end technologies such as React, Angular, JavaScript or TypeScript.
• You are comfortable designing both back-end and front-end solutions.
• You have strong knowledge of Microsoft Azure, cloud architectures and DevOps practices.
• You have experience with CI/CD pipelines, source control and automated deployments.
• You have experience with SQL, data modelling and application integration.
• You have experience coaching developers, conducting code reviews and raising engineering standards.
• You value documentation, knowledge transfer and maintainable code.
• You have a strong business mindset and understand how technology creates measurable value.
• You are fluent in English. Dutch and/or French are a strong asset.
• You thrive in fast-moving environments and enjoy taking ownership of complex challenges.
• Bonus: you're familiar with AI-based coding assistants (e.g. Claude Code, GitHub Copilot, Replit, Cursor) and know how to use them to boost productivity.

What’s In It For You

• EY Family – you become part of the EY Family providing you with all the necessary skills, training and opportunities; enabling you to grow to your fullest potential.
• Attractive remuneration package - We offer an attractive remuneration package; including a company car and charging card, iPhone plus subscription, health insurance, pension plan, meal vouchers, and eco vouchers.  Thanks to our flex plan it is possible to choose what you value most.
• Mobility package - You’ll be able to opt-in for the mobility budget. In return for giving up your (right to a) company car, you’ll receive a monthly budget from EY as compensation. This budget will allow you to use your employer-provided compensation for alternative transportation means or similar benefits, incl. reimbursement of housing costs (on condition you live within 10km of your main place of employment).
• Flexible working arrangements - We are proud of our flexible working arrangements. We will actively support you in building a successful career and delivering excellent client service without sacrificing your personal priorities. We offer flexible working hours and working from home multiple days per week is possible.
• Inspiring work environment - At EY we are dedicated to providing you with an inspiring work environment. A work environment that allows you to further develop your skills and enables you to fulfill your true potential.
• Learning & personal growth - You will benefit from an onboarding program, receive extensive training and will be coached by a counselor. We offer a clear career path tailored to your unique skills with necessary guidance. 
• Artificial Intelligence – stay up to date with the latest AI trends through our extensive training opportunities and integrated AI systems. You’ll learn how to leverage AI in a smart and efficient way in your day-to-day work, while developing skills to identify, quantify and track value creation when integrating AI into client environments.  
• Fun - By joining our EY- teams, you can participate in team activities, and companywide events and enjoy a drink during our monthly after-work drink.  
• Sustainability - We have a fleet of hybrid and electric cars. Our flex plan makes it possible for you to choose the most sustainable option for you. You can also opt for a train subscription or lease a bike.
• Diversity & Inclusion - At EY we are passionate about the inclusion and support of individuals of all groups; we do not discriminate on the basis of race, religion, gender, sexual orientation, or disability status.
• Location - All of our offices are easily accessible by public transport and/or by car and have parking space. They all have parking spaces and charging stations are provided.

Here at EY, you’ll have the chance to build a truly exceptional experience. We’ll empower you with the latest technology, surround you with high-performing teams, and provide the global scale and diverse and inclusive culture you need to discover your full potential. Through our coaching and training programs, you’ll develop the skillsets you need to stay relevant today and in the future – all while building a network of colleagues, mentors, and leaders who will be on the journey with you at EY and beyond.