Senior Backend Developer in London

Who are Yapily? Why we exist, and where we’re headed:

Our Mission: Redefining how the world interacts with value.

Our Vision: A world without financial friction.

Our Purpose: To empower everyone to access and move value.

At Yapily, we’re building a powerful, scalable, and secure open banking infrastructure that redefines how the world interacts with value. Our open banking platform powers leading companies, such as Adyen, Intuit QuickBooks, and Google. By delivering payment initiation, bank data access, and pre-built products, we enable businesses to innovate fast and push the boundaries of financial technology. As an early pioneer of open banking, we’re actively shaping the future of this industry with unrivalled expertise and a relentless focus on innovation.

Responsibilities:

• Architect and oversee highly scalable, secure web applications, services, and APIs, ensuring high performance and reliability.
• Champion AI-native development workflows, integrating AI coding agents to improve developer velocity, code quality, and maintainability across the team.
• Partner with Product Managers and stakeholders to shape the technical roadmap, translating complex requirements into elegant and scalable solutions.
• Define technical standards and lead robust code review processes, fostering a culture of knowledge sharing and technical excellence.
• Collaborate with Support and CSM functions to proactively troubleshoot, debug, and resolve critical customer issues.
• Deepen our collective expertise in Open Banking and PSD2, pushing the boundaries of what can be built with our APIs.

Qualifications:

• You bring expert-level experience with Java and the Spring Framework, with a proven track record in distributed systems and microservices architectures.
• You embrace innovation and are eager to drive our AI-native future by effectively integrating AI coding agents into your daily development workflow.
• You are commercially minded and pragmatic; you prioritise effective, cost-efficient solutions and are always looking to iterate on best practices you have seen elsewhere.
• You have an API-first product mindset: you prioritise customer outcomes and deeply engage with user use-cases before writing code.
• You are a self-starter who thrives in ambiguity and the fast-paced, changing priorities of a startup environment.
• You communicate clearly, bridging the gap between engineering and non-technical stakeholders to articulate complex concepts.
• You possess high integrity, treating all interactions—whether with internal team members or external partners—with confidentiality, sensitivity, and diplomacy.
• You have a Bachelor’s degree in Computer Science, Engineering, or a related field (5+ years of relevant experience).
• You are driven and curious. You ask questions and you strive to understand.
• You understand that the team will have different strengths. You’re happy to learn from them and to share your expertise.
• You are comfortable with the pace, ambiguity, and the need to be a self-starter that comes with working in a start-up.

Benefits:

• Competitive Pay & Equity – We offer a great base salary plus equity, so you’ll own a part of what we’re building together.
• Generous Time Off – Enjoy 25 days of holiday each year (plus bank holidays if you’re in the UK), and earn an extra day each year after your first, up to 5 more!
• Hybrid Working – Life’s about balance. You can work from home up to 3 days a week, eligibility criteria applies.
• Nomad Working – Feel like a change of scenery? Work from anywhere for up to 20 days each year.
• Family First – We offer enhanced Maternity and Paternity leave because your family matters.
• Private Medical Insurance – You’ll get top-notch cover through BUPA, because your health is a priority.
• Mental Health Support – Access personalised mental wellness support through our award-winning partner.
• Future-Ready Perks – Including a solid company pension, life assurance, and income protection.
• Learn & Grow – A £200 annual budget for learning and personal development. Invest in you!
• Cycle to Work Scheme – Commute the healthy way with support from our cycle to work programme.
• Refer a Friend – Bring someone great onboard and earn £1,000 with our referral scheme.
• Team Vibes – Monthly socials, team lunches, and a budget to hang out and have fun (yes, pizza included).
• Office Snacks & Doggies – Daily snacks to keep you going, and yes – we’re proudly a dog-friendly office.

Our Values:

• We obsess about quality. Our customers have entrusted us with a critical function in a regulated industry…and we take that responsibility seriously. We always assume ownership and hold ourselves accountable.
• We are curious. Our innovation is powered by our collective growth mindset. We’re lifelong learners who challenge assumptions, experiment, and iterate.
• We act with integrity. We’re guided by our mission and earn and maintain trust by doing what’s right, even when it’s not easy.
• We are do-ers. We reject indifference and agility is our strength. We’re motivated by challenges, and biased towards action.
• We problem-solve together. We’re diverse people in diverse places, and know the best solutions are born out of collaboration. We win, lose, and learn…together.