Lead Software Engineer

Capital on Tap

We’re Capital on Tap 👋 💳 Capital on Tap started because small businesses were underserved. Big banks were slow, their products weren't fit for purpose, and small business owners often couldn't access what they needed. We set out to fix that. Today we're a financial platform - not just a credit card company. We offer a best-in-class business credit card, SME-focused spend management platform, a savings product that hit £1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier.  1,000+ employees, £20bn in annual card spend, 200,000+ customers, 17,000+ Trustpilot reviews averaging 4.7 stars, and we're profitable. We’ve done a pretty good job so far, but we’re just getting started!  🏡🏢This is a Hybrid role, the Engineering team work from our London (Moorgate) Offices 2 days per week. This is a multiple headcount role, so please don't be put off if you've seen this advertised for a while. What You’ll Be Doing   As a Lead Software Engineer at Capital on Tap, you'll be a highly experienced, deeply hands-on engineer who shapes how we build. You'll spend the majority of your time writing and reviewing code, designing systems, and solving complex technical problems; while naturally becoming the go-to technical authority your fellow engineers rely on. You'll work closely with other Technical Leaders, Product Managers, and the wider Engineering Group to deliver high-impact features and ensure our systems scale with the business. * Stay deeply hands-on in day-to-day software development, setting the technical standard through the quality of your own work * Design and evolve microservices and distributed systems that are scalable, resilient, and maintainable * Act as the technical authority in your area; you'll be the person engineers turn to when they hit a hard problem * Conduct thorough code reviews and share knowledge that raises the bar across the team * Lead high-impact projects from concept to delivery, making pragmatic architecture decisions along the way * Collaborate closely with Product, QA, and Team Leads to align technical execution with business goals * Identify and mitigate technical risk proactively, keeping delivery on track * Champion engineering best practices, including adoption of AI tools and automation   We’re Looking For 🔎   * Extensive commercial experience with C# and .NET, capable of writing clean, well-tested, production-grade code * Strong experience designing and building microservices and distributed systems * Solid grounding in RESTful API design and Azure cloud development * Deep familiarity with modern software development practices and scalable system architecture * Experience working cross-functionally with Product, QA, and other stakeholders * Pragmatic approach to delivery; you know how to ship an MVP and iterate with purpose * Ability to embed deeply within an engineering group, building strong domain knowledge over time and becoming a trusted technical voice across the team and wider business * React or fullstack experience is a plus     Diversity & Inclusion 🌈 We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work. Great Work Deserves Great Perks We try not to take ourselves too seriously (all the time) so we make sure our office is decked out with a pool table, arcade machine, beer tap, and a couple of office dogs thrown in for good measure. Check out our benefits: 🏥 Private Healthcare including dental and opticians services through Vitality ✈️ Worldwide travel insurance through Vitality 🎁 Anniversary Rewards (£250, £500, £750, 4-week fully paid sabbatical) 👛 Salary Sacrifice Pension Scheme up to 7% match 🏖️ 28 days holiday (plus bank holidays) 📖 Annual Learning and Wellbeing Budget 👪 Enhanced Parental Leave 🚲 Cycle to Work Scheme 🚂 Season Ticket Loan 💬 6 free therapy sessions per year 🐶 Dog Friendly Offices 🍫 Free drinks and snacks in our offices Check out more of our benefits, values and mission here. Interview Process 🤝 * First stage: 30 minute intro call with Talent Partner * Second stage: 45 minute "Tech Chat" & Values Interview with an Engineering Managers & People Partner * Third stage: 60 minute Code Pairing with 2x members of our engineering team * Final stage: 60 minute Case Study with Product & Engineering + 60 minute Good to Great Interview with our CTO (onsite)   Other Info 👍Check out our ‘Top Tips’ for interviewing. ✔️Keep updated on new job opportunities by following us on Linkedin. 📧Email careers@capitalontap.com if you have any questions. Excited to work here? Apply! If you’d like to progress your career within our fast growing, profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.)

Faculty

WHY FACULTY? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, we’ve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We don’t chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and we’re always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where you’ll be empowered to envision its most powerful applications, and to make them happen. ABOUT THE TEAM Our Energy, Transition and Environment business unit is pioneering meaningful change in the clean energy revolution. Our vision is to accelerate the transition to net-zero emissions and drive efficiencies for a new era of utility companies. We believe that the responsible, and intelligent, deployment of AI is critical to the success of this mission. We partner with a wide range of clients - from major energy operators, to GreenTech startups, and national infrastructure providers - to build solutions which return measurable impact and move us towards a smarter, cleaner, and more sustainable world. ABOUT THE ROLE Join us as a Lead Software Engineer, with a focus on Machine Learning, to spearhead the technical direction and delivery of complex, innovative AI projects. You will act as a technical expert, applying your skills across various projects from client-side deployments to advising on AI strategy, while ensuring architectural decisions are sound and reliable. This role demands a balance of deep technical expertise and strong leadership, focusing on driving innovation, fostering team growth, and building reusable solutions across the organisation. If you're ready to manage high-risk projects and deliver practical, innovative outcomes, this is your chance to shape our future. WHAT YOU'LL BE DOING: * Setting the technical direction and overseeing delivery of high-risk, ill-defined software and infrastructure projects while balancing strategic trade-offs and helping teams prioritise in shifting environments, taking full ownership of successful outcomes for our most challenging projects. * Designing and developing reliable, production-grade ML systems and justifying critical architectural decisions to ensure robust delivery. * Developing clear, comprehensively scoped roadmaps for novel solutions to help customers achieve their strategic goals and accurately estimating effort on large workstreams to ensure successful and timely delivery * Engaging with technical and non-technical customers at all stages of the customer lifecycle, giving reasoned and credible advice and opinions on a broad range engineering topics * Collaborating proactively both within multidisciplinary delivery teams and across the engineering community at Faculty to overcome technical challenges * Coaching team members on specific technologies and driving the development of shared organisational resources and libraries to streamline delivery and improve engineering methods across the company. * Leading the hiring and selection process while mentoring multiple individuals and managers to define the future shape of the engineering team. WHO WE'RE LOOKING FOR: * You are a recognised technical expert who sets the standard for code quality and solution design, possessing the breadth of knowledge to solve almost any problem. * You have an entrepreneurial mindset and are proactive in recommending new technologies or ways of working to keep our offering ahead of the competition. * You bring expert-level experience in at least one major Cloud Solution Provider (AWS, GCP, or Azure) and have led teams to build full-stack web applications. * You are a proven leader, capable of managing other managers and setting team-wide development goals to elevate client delivery. * You thrive in high-stakes environments, demonstrating the ability to turn innovative ideas into practical, measurable outcomes for global energy operators. * You are a compelling communicator who can confidently defend technical rationales to senior stakeholders and guide both technical and non-technical teams. THE INTERVIEW PROCESS 1. Talent Team Screen (30 minutes) 2. Introduction to the Hiring Manager (30 minutes) 3. Pair Programming Interview (90 minutes) 4. System Design Interview (90 minutes) 5. Commercial & Leadership Interview (60 minutes) #LI-PRIO OUR RECRUITMENT ETHOS We aim to grow the best team - not the most similar one. We know that diversity of individuals fosters diversity of thought, and that strengthens our principle of seeking truth. And we know from experience that diverse teams deliver better work, relevant to the world in which we live. We’re united by a deep intellectual curiosity and desire to use our abilities for measurable positive impact. We strongly encourage applications from people of all backgrounds, ethnicities, genders, religions and sexual orientations. Some of our standout benefits: * Unlimited Annual Leave Policy * Private healthcare and dental * Enhanced parental leave * Family-Friendly Flexibility & Flexible working * Sanctus Coaching * Hybrid Working If you don’t feel you meet all the requirements, but are excited by the role and know you bring some key strengths, please don't hesitate in applying as you might be right for this role, or other roles. We are open to conversations about part-time hours.

Faculty

WHY FACULTY? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, we’ve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We don’t chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and we’re always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where you’ll be empowered to envision its most powerful applications, and to make them happen. ABOUT THE TEAM In our Professional and Financial Services Business unit, we bring everything we have learned in more than a decade of Applied AI, and use it to help our clients navigate a rapidly changing landscape. We develop and embed AI solutions which help financial institutions become more efficient, enhance customer experience, and find the commercial upside in uncertain markets. Within the constraints of a highly regulated industry, we see so much opportunity for impactful innovation and are proud to set the gold-standard for marrying technical excellence with safe deployment. #LI-PRIO ABOUT THE ROLE As a Lead Software Engineer, you'll spearhead the technical direction and delivery of complex, innovative AI projects. You will act as a technical expert, applying your skills across various projects from AI strategy to client-side deployments, while ensuring architectural decisions are sound and reliable. This role demands a balance of deep technical expertise and strong leadership, focusing on driving innovation, fostering team growth, and building reusable solutions across the organisation. If you're ready to manage high-risk projects and deliver practical, innovative outcomes, this is your chance to shape our future. WHAT YOU'LL BE DOING * Acting as the primary technical authority for enterprise clients, guiding projects from discovery to production deployment. * Leading and mentoring a squad of engineers, empowering them to deliver their best work. * Implementing scalable and future-proof front and backend engineering patterns and practices. * Translating complex customer needs and implementation challenges into actionable feedback to shape the next phase of a project. * Distilling complex technical concepts for diverse audiences, from client-side engineers to senior business stakeholders.   WHO WE'RE LOOKING FOR * You have proven ability to distill complex technical concepts for a wide range of audiences. * You bring strong, hands-on experience in full-stack development, with a deep understanding of system architecture and design. * You are an expert in Python and TypeScript/React. * You possess solid knowledge of CI/CD pipelines (e.g., GitLab), Docker, and deploying applications on Kubernetes. * You have a demonstrated history of championing automated testing strategies to ensure robust and reliable code. * You have a genuine passion for working with customers, understanding their problems, and delivering solutions that provide immediate value. OUR INTERVIEW PROCESS 1. Talent Team Screen (30 minutes) 2. Pair Programming Interview (90 minutes) 3. System Design Interview (90 minutes) 4. Commercial & Leadership Interview (60 minutes) OUR RECRUITMENT ETHOS We aim to grow the best team - not the most similar one. We know that diversity of individuals fosters diversity of thought, and that strengthens our principle of seeking truth. And we know from experience that diverse teams deliver better work, relevant to the world in which we live. We’re united by a deep intellectual curiosity and desire to use our abilities for measurable positive impact. We strongly encourage applications from people of all backgrounds, ethnicities, genders, religions and sexual orientations. Some of our standout benefits: * Unlimited Annual Leave Policy * Private healthcare and dental * Enhanced parental leave * Family-Friendly Flexibility & Flexible working * Sanctus Coaching * Hybrid Working If you don’t feel you meet all the requirements, but are excited by the role and know you bring some key strengths, please don't hesitate in applying as you might be right for this role, or other roles. We are open to conversations about part-time hours.