Senior Mobile Engineer - Flutter

We are searching for an experienced Senior Flutter Engineer to work in a product centric role to help us on our mission of striving to make investing easier for all. We like winning awards, and we want you to help delight our users by creating award winning apps. You will put users at the forefront of the way you think and be passionate about great user experience and user interface design. You will be able to deliver tested, resilient, and performant code against a fast-paced environment. Your role will be pivotal in helping us achieve our mission by developing, shaping, and iterating our customer facing Flutter applications.

What does the job involve?

• Working with product owners, product managers, UXD and other software engineers to architect solutions and write technical documents that identify software project requirements.
• You and your team will be responsible for an overall company goal, rather than building a specific feature.
• Write well-formulated, testable and readable code using appropriate software paradigms.
• Lead the evolution of development in the team, via pairing with others, reviewing pull requests, and advocating development standards to be followed by existing and new team members.
• Ensure accessibility is at the forefront of our approach.
• Mentor and develop junior team members.
• Build strong relationships across cross functional teams, particularly within the product, UXD teams.

Competence, knowledge and skills

• 4+ years of professional experience in mobile application development.
• Strong understanding of mobile DevOps practices, including CI/CD pipelines, release management, and app store deployment processes.
• Advanced software engineering skills, including writing high-quality code, conducting thorough code reviews, and proactively identifying anti-patterns and maintainability risks.
• Proven ability to diagnose, troubleshoot, and resolve defects across the mobile application lifecycle.
• Solid knowledge of Functional Reactive Programming (FRP) concepts and practical application in mobile architectures.
• Strong grasp of software architecture principles, with experience using the C4 model (or equivalent lightweight modelling techniques) to communicate and document designs.
• Experience developing and maintaining design systems, ensuring consistency, scalability, and reuse across mobile products.
• Exceptional attention to detail with a track record of translating ambiguous problems into effective solutions, including using rapid prototyping to validate ideas early.
• Clear, thoughtful communicator who values active listening and intentional collaboration across roles and disciplines.
• Comfortable working autonomously while also contributing effectively within cross-functional teams.
• Strong passion for mobile UX and building inclusive products, with working knowledge of accessibility best practices and relevant standards.
• High ownership and accountability, with a proactive mindset and strong initiative to identify and deliver high-impact improvements.

Our perks and benefits

• Starting salary between £70,000 - £100,000 (dependent on experience)
• Starting holiday entitlement of 26 days, increasing up to 31 days with length of service plus a holiday buy and sell scheme
• A choice of pension schemes with matched contributions up to 6%
• Discretionary bonus scheme
• Annual free share awards scheme
• Buy As You Earn (BAYE) Scheme
• Health Cash Plan – provided by SimplyHealth
• Discounted private healthcare scheme and dental plan
• Free gym membership
• Employee Assistance Programme
• Bike loan scheme
• Sick pay+ pledge
• Enhanced maternity, paternity, and shared parental leave
• Loans for travel season tickets
• Death in service scheme
• Paid time off for volunteer work
• Charitable giving opportunities through salary sacrifice
• Calendar of social events, including monthly payday drinks, annual Christmas party, summer party and much more
• Ongoing technical training
• Professional qualification support
• Talent development programmes
• 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

About us

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.

Hybrid working

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.