.NET Developer, Consultant, Manager

Belfast; Alabama; On-site; USD 90,000 - 120,000; Full time

Job summary

Deloitte is seeking an experienced .NET developer to join our expanding UK Technology & Transformation team. You will design, build, and maintain robust .NET solutions, collaborating with cross-functional teams to deliver innovative software for clients in a fast-paced environment.

You will work with modern tooling, enhance technical craftsmanship, and pursue qualifications and certificates while contributing to the engineering community.

Qualifications

• Proven .NET development experience with C# (LINQ, delegates, async programming).
• Experience with ASP.NET Core web apps and RESTful APIs.
• Knowledge of EF Core and design patterns (SOLID).
• Familiarity with CI/CD tools and cloud (Azure).
• Experience with containerisation (Docker, Kubernetes).
• Version control with Git and collaboration in teams.

Responsibilities

• Design, develop, and maintain high-quality .NET codebases.
• Participate in the software development lifecycle from design to deployment.
• Collaborate with cross-functional teams to deliver software solutions.
• Write well-documented code and contribute to technical docs.
• Troubleshoot issues and maintain live services; resolve production problems.

Skills

C#

.NET

ASP.NET Core

REST APIs

Entity Framework Core

Azure Cloud

Tools

Azure DevOps

GitHub Actions

Docker

Kubernetes

Job description

Do you want to be at the heart of some of the biggest and most ambitious engineering projects?

Technology & Transformation: How do you make intelligent, future-proof decisions in a world where change is the one constant? That's exactly what you'll help our clients to do. You'll build trusted relationships with business stakeholders - and use the most exciting new technologies available - to create data-driven programmes that transform their organisations.

You may have a brilliant mind, be a confident communicator or a nerd for all things digital, or you may have an impeccable business instinct, a collaborative outlook and a flair for big ideas. Come as you are because we value differences and celebrate diversity. Your advice will help clients position their organisations to succeed in an ever-evolving marketplace.

Our practice is positioned at the crucial intersection of business, technology, and industry to build and run services for our clients that answer their most challenging problems.

This role is focused on the technical delivery of innovative new solutions for clients. Join us to drive innovation and technology forward, collaborating within cross-functional teams. You will utilise leading-edge methodologies and tools to develop and implement groundbreaking, user-friendly solutions. Offering excellent development opportunities, you will have the chance to hone your technical craft, gain new skills, and complete qualifications and certificates. This is your chance to make a real impact.

We encourage consideration of flexible ways of working, both formal and informal arrangements that allow for the best outcomes for our people and our clients. If this opportunity is of interest to you with some flexibility, please do discuss with us.

Connect to your career at Deloitte

Deloitte drives progress. Using our vast range of expertise, we help our clients' become leaders wherever they choose to compete. To do this, we invest in outstanding people. We build teams of future thinkers, with diverse talents and backgrounds, and empower them all to reach for and achieve more.

What brings us all together at Deloitte?It’show we approach the thousands of decisions we make everyday. How we behave, our beliefs and our attitudes. In other words: our values. Whatever we do, whereverwe arein the world, welead the way,serve with integrity, take care of each other ,fosterinclusion, andcollaborate for measurable impact. These five shared values lead every decision wemake and action we take, guiding us to deliver impact how and where it mattersmost .

Connect to your opportunity

This team is focused on the technical delivery of new solutions that solve complex challenges for clients. Join us to drive innovation and technology forward, collaborating with cross-functional teams and using cutting-edge tools. Offering excellent development opportunities, you will have the chance to hone your technical craft, gain new skills and complete qualifications and certificates. This is your chance to make a real impact.

We’re on the lookout for a talented and experienced .NET developer to join our rapidly growing team. Every day is different, requiring your in-depth knowledge of engineering and architectural principles to design and build innovative solutions for our broad range of clients. You will work with our outstanding digital talent, collaborating closely in mature, cross-functional teams to think big and push the boundaries of what is possible. This is your chance to drive digital transformation and shape the future of services for the UK. Explore the exciting possibilities as a developer at Deloitte, where your skills meet unparalleled opportunities.

Connect to your skills and professional experience

We partner with incredible clients across a variety of industries, leveraging a wide range of cutting-edge technologies. While the following skills provide a taste of what you might work with, don't view this list as absolute requirements. We're more interested in your passion for innovation and your ability to deliver exceptional solutions for our clients.

We are looking for an adaptable professional with strong previous experience. At Deloitte, we know that it takes a mix of people to do amazing work. You'll collaborate with and learn from talented individuals with diverse skills, backgrounds, and perspectives – bringing your own unique mix to the table is encouraged!

If you're passionate about driving innovation and have a proven track record in building brilliant things, we invite you to explore this opportunity to shape the future of Deloitte.

Responsibilities:

• Design, develop, and maintain high-quality .NET codebases.
• Participate throughout the software development lifecycle, from design to deployment and maintenance.
• Engage and provide technical insight during system design.
• Collaborate with cross-functional teams to deliver software solutions.
• Write well-documented code and contribute to technical documentation.
• Proactively troubleshoot issues, maintain the smooth operation of live services, and play a key role in resolving complex production issues.
• Stay up to date with the latest .NET technologies and best practices, assessing their impact and identifying opportunities for adoption.
• Effectively communicate complex technical topics to both technical and non-technical audiences.
• Actively contribute to the engineering community.
• Proven .NET development experience using advanced C# features (LINQ, delegates and lambdas, asynchronous programming, concurrency, and generics) and mentoring others.
• Experience with the .NET platform and ASP.NET Core, including building web applications and services.
• Experience designing, developing, and securing RESTful APIs using ASP.NET Core Web API, including threat assessment throughout the development process.
• Deep understanding of object-oriented programming principles (SOLID), design patterns, dependency injection, and secure coding practices.
• Experience deploying and managing .NET applications using containerisation technologies (Docker, Kubernetes).
• Experience using and defining version control strategies for the team (e.g., Git).
• Understanding .NET application and system performance monitoring, performance issue diagnosis, and implementing solutions.
• Experience using CI/CD pipelines and tools (Azure DevOps, GitHub Actions, Jenkins).
• Working knowledge of cloud platforms, particularly Microsoft Azure, and their core services.
• Experience with messaging solutions (Azure Service Bus, Kafka, or SQS), serverless technologies (Azure Functions or AWS Lambda), and monitoring and logging tools (Application Insights, Azure Monitor, Dynatrace, ELK stack, or Splunk).
• Experience using structured logging and telemetry (including Open Telemetry) to derive application insights.
• Consideration of non-functional requirements (security, accessibility, resilience, performance, and observability) during design and development.
• Solid understanding of Object-Relational Mapping principles and proficiency with Entity Framework Core.
• Experience using OpenAPI/Swagger for API documentation and coding alongside AI assistants such as GitHub Copilot.
• Experience with test tools and frameworks such as xUnit, NUnit, Playwright, Selenium, Axe, Postman, or Bruno.
• Experience delivering complex projects from backlog through to production.

Soft Skills:

• Excellent communication, collaboration and problem-solving abilities, enabling the identification and resolution of challenges in a dynamic, fast-paced environment.
• Ability to understand task requirements, dependencies, and prioritise work effectively for the team.
• Ability to mentor and guide junior engineers.
• Willing and eligible to obtain UK security clearance to Security Check (SC) is essential.
• Active or readily transferable security clearance is desirable.

Connect to your business - Technology and Transformation

Distinctive thinking, deep expertise, innovation and collaborative working. That’s what connects us. That’s what makes us Deloitte. If you want to help solve some of the biggest tech and transformational challenges around, join us. Together, we’ll make an impact that matters.

Engineering, AI and Data

We lead transformation at the heart of our clients; re-engineering the core of our clients’ organisations, helping to unleash growth, and creating better futures for their customers, citizens and employees.

Personal independence

Regulation and controls are standard practice in our industry and Deloitte is no exception. These controls provide important legal protection for both you and the firm. We are subject to a number of audit regulations, one of which requires that certain colleagues abide by specific personal independence constraints (e.g., in relation to any financial interests and employment relationships). This can mean that you and your "Immediate Family Members" are not permitted to hold certain financial interests (shares, funds, bonds etc.) with audit clients of the firm, and also prohibitions on certain employment relationships (e.g., you are not permitted to hold a secondary employment role with SEC audit clients of the firm whilst being employed by the firm). The recruitment team will provide further detail as you progress through the recruitment process or you can contact the Independence team upon request.

Connect with your colleagues

“The great culture, flexibility, and range of experiences that Deloitte offers are what sets this firm apart. In Technology & Transformation, Deloitte is far ahead of any of our immediate competitors.” - Sophia, Technology & Transformation

“What attracted me to Deloitte were the endless opportunities and the collective experience of other like-minded individuals. Deloitte’s clients include many of the world’s largest organisations; I wanted to be part of a team that made a difference that I could be proud of.” - Dan, Technology & Transformation

Our hybrid working policy

You’ll be based in Belfast with hybrid working.

At Deloitte we understand the importance of balancing your career alongside your home life. That’s why we’ll support you to work flexibly through our hybrid working policy. Depending on the requirements of your role, you’ll have the opportunity to work in your local office, virtual collaboration spaces, client sites and remotely. You’ll get the chance to meet face to face when needed, while you collaborate and learn from colleagues, share your experiences, and build the relationships that will fuel your career and prioritise your wellbeing. Please check with your recruiter for the specific working requirements that may apply for your role.

Our commitment to you

Making an impact is more than just what we do: it’s why we’re here. So we work hard to create an environment where you can experience a purpose you believe in, the freedom to be you, and the capacity to go further than ever before.

We want you. The true you. Your own strengths, perspective and personality. So we’re nurturing a culture where everyone belongs, feels supported and heard, and is empowered to make a valuable, personal contribution. You can be sure we’ll take your wellbeing seriously, too. Because it’s only when you’re comfortable and at your best that you can make the kind of impact you, and we, live for.

Your expertise is our capability, so we’ll make sure it never stops growing. Whether it’s from the complex work you do, or the people you collaborate with, you’ll learn every day. Through world-class development, you’ll gain invaluable technical and personal skills. Whatever your level, you’ll learn how to lead.

Connect to your next step

A career at Deloitte is an opportunity to develop in any direction you choose. Join us and you’ll experience a purpose you can believe in and an impact you can see. You’ll be free to bring your true self to work every day. And you’ll never stop growing, whatever your level.

Discover more reasons to connect with us, our people and purpose-driven culture at deloitte.co.uk/careers