Net Developer jobs in United Kingdom

We now have an exciting opportunity for a Senior Software Engineer to join the Operational and Regulatory Technology department for an award‑winning investment platform, offering a collaborative team working environment, training and excellent career progression.

Our strategy is to have a cross‑functional development team, with team members working on all areas of our technology stack and propositions.

• Agile methodologies and a passion for continuous improvement and building a high-performance engineering team
• Guide and mentor the team to design and deliver high quality products
• Consider architectural and non-functional requirements and work with the team to deliver
• Significant commercial experience developing services and APIs with C#, .NET core, Mongo and/or SQL with techniques such as domain-driven design and MVC.
• Strong technical background in web development with Angular/React/VueJs.
• Experience in developing HTTP-based APIs and implementation of RESTful services with JSON.
• Thorough understanding of CI/CD pipelines
• Practices Test Driven Development and is comfortable with various test frameworks and concepts.
• A proven record in developing scalable, highly available and highly performing middle-tier components.
• Familiarisation with containerisation and tools like Docker and Kubernetes
• Experience of developing, deploying, and maintaining Cloud-Based solutions on AWS
• Understand principles behind highly performing web pages
• Experience/Familiarity with Entity framework core.
• Experience/Familiarity with communications technologies (Web API, Google Protocol Buffers) and message queues (e.g. RabbitMQ, SQS)
• Agile / SCRUM / SAFe
• Strong communication skills, written and verbal
• Very motivated with high levels of drive and enthusiasm
• E-commerce and/or financial services experience

AJ Bell is one of the fastest‑growing investment platform businesses in the UK offering an award‑winning range of solutions that caters for everyone, from professional financial advisers to DIY investors with little to no experience. We have over 644,000 customers using our award‑winning platform propositions to manage assets totalling more than £103.3 billion. Our customers trust us with their investments, and by continuously striving to make investing easier, we aim to help even more people take control of their financial futures.

Having listed on the Main Market of the London Stock Exchange in December 2018, AJ Bell is now a FTSE 250 company.

Headquartered in Manchester with offices in central London and Bristol, we now have over 1,500 employees and have been named one of the UK’s “Best 100 Companies to Work For” for six consecutive years and in 2025 named a Great Place to Work®.

At AJ Bell you can expect a friendly working environment with a strong sense of teamwork, we have a great sense of pride in what we do, and this is reflected in our guiding principles.

• Starting holiday entitlement of 26 days, increasing up to 31 days with length of service
• Holiday buy and sell scheme
• A choice of pension schemes with matched contributions up to 7%
• Discretionary bonus scheme
• Annual free share awards scheme
• Buy As You Earn (BAYE) Scheme
• Health Cash Plan – provided by Simply Health
• Discounted private healthcare scheme and dental plan
• Free gym membership, with an on‑site gym providing a wide range of free classes
• Employee Assistance Programme
• Sick pay+ pledge
• Enhanced maternity, paternity, and shared parental leave
• Discounted nursery fees at Kids Planet on Exchange Quay
• Loans for travel season tickets
• Dedicated time for proof-of-concepts and assessing new tech
• Support to attend conferences, events, and meet‑ups
• Charitable giving opportunities through salary sacrifice
• Calendar of social events, including monthly payday drinks, annual Christmas party, summer party and much more
• Parking at Exchange Quay
• Personal development programmes built around you and your career goals, including access to personal skills workshops
• Ongoing technical training
• Peer recognition scheme, with rewards including restaurant and shopping vouchers or time off
• Monthly leadership breakfasts and lunches
• Casual dress code
• Access to a range of benefits from our sponsorship deals

At AJ Bell, our people are the heart of our culture. We believe in building strong connections by working together. That's why we offer a hybrid working model, where you’ll spend a minimum of 50% of your working time per month in the office. For new team members, an initial period will be full‑time in the office to help you immerse yourself in our business and build valuable relationships with your colleagues.

AJ Bell is committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and all employees are empowered to bring their whole self to work.

We do not discriminate on the basis of race, sex, gender identity, sexual orientation, age, pregnancy, religion, physical and mental disability, marital status and any other characteristics protected by the Equality Act 2010. All decisions to hire are based on qualifications, merit and business need.

If you like the sound of the above, or just want to know more about the company and the role, we'd love to speak to you.