• Integrate fiat payment methods (cards, bank transfers, e-wallets, local payment rails) through payment service providers, gateways, and aggregators • Build and operate core money-handling flows: deposits, withdrawals, refunds, payouts, chargebacks, and settlement • Design and develop ledger and balance-tracking systems that keep money movement accurate and auditable • Guarantee transactional integrity across distributed systems — idempotency, consistency, exactly-once processing, and safe retries • Handle PSP webhooks, callbacks, and asynchronous status updates, including reconciliation against provider records • Build and optimize scalable, low-latency Node.js services supporting high-throughput transactional workloads • Ensure the performance, reliability, and security of payment APIs • Collaborate cross-functionally with product, risk/fraud, finance, and other engineers to ship end-to-end payment features • Contribute to best practices across code quality, testing, CI/CD, and deployment, and share payments domain knowledge with the team

- Support and maintain the existing software developed in NI LabVIEW - Perform bug fixing and implement change requests (CRs) - Analyze the current system architecture and business logic - Participate in the gradual migration of the solution from LabVIEW to .NET - Collaborate with the development team and contribute to technical discussions - Ensure stability and reliability of the solution during the transition phase

Role Description We’re now looking for a Lead Full-Stack Engineer to take ownership of solution design and lead delivery across a distributed engineering setup. - Own the design for key features of our solutions - Organise and manage the work of a small squad of engineers - Ensure that coding and testing standards are upheld This role offers the opportunity to work closely with the founders at a defining stage in our growth. Responsibilities - Solution design: - Own the end-to-end solution design for new features within a defined architecture framework - Make pragmatic decisions about trade-offs (scope, performance, scalability, security) in a fast-moving environment - Delivery leadership: - Act as the day-to-day technical and delivery lead for a squad of engineers - Define and manage the work: break down Product Requirement Documents and user stories into clear tasks, estimate effort, set priorities and timelines, and track progress to ensure on-time delivery - Run or participate in ceremonies (stand-ups, planning, reviews) to keep work aligned and unblock issues quickly - Hands-on development: - Take ownership of complex or high-impact pieces of work, especially where the architecture, integrations or performance considerations are non-trivial - Design, build and optimise the journeys of our service using our tech stack: - Backend: Python - Frontend: React + Flutter - Data / Infra: Postgres, AWS (S3, ECS etc.) - Write high-quality, testable code and contribute to our continuous integration and deployment pipelines - Technical ownership & continuous improvement: - Take ownership of technical design as part of a small, fast-moving team - Help evolve our platform architecture for performance, resilience, observability and security as we scale - Identify and drive improvements to developer experience, tooling and internal processes (e.g. testing, release, monitoring, on-call), in collaboration with both in-house and outsourced engineers Qualifications - Degree in Computer Science or related developer education (e.g. a reputable coding bootcamp) or equivalent practical experience - 7+ years’ experience designing, developing, shipping and maintaining backend applications using Python and front-end web applications using modern JavaScript frameworks (ideally React.js), including operating at lead level - Proven experience leading a squad’s work– including planning and prioritising work, running ceremonies/stand-ups, reviewing output, and ensuring on-time, high-quality delivery across time zones - Strong experience working with both Python and React, and some experience working with AWS hosting/back-end services - Significant experience using agentic coding tools - Experienced in designing, building and maintaining automated tests and contributing to CI pipelines - Has worked with other developers in an agile set-up (e.g. sprints, stand-ups, retros) - Experienced in debugging and fixing live incidents in time-pressured situations, and in improving systems/processes to prevent recurrences - Experience of working with continuous deployment pipelines (you don’t have to build everything yourself, but should be comfortable working within and improving such setups) - Strong understanding of industry trends and development best practices– especially regarding security, application performance and scalability - Has a strong sense of ownership, attention to detail and the ability to work independently with a team-oriented work ethic - Strong communication skills for effective teamwork and collaboration, and confidence interacting with customers and partners in a technical leadership capacity - Is proactive, initiates improvements, and offers assistance even without being asked - Comfortable in using AI code development tooling - Right to work in the UK Requirements - Experience in B2B SaaS, ideally in fintech, wealth tech or other regulated industries - Experience integrating with CRM systems and/or financial platforms - Exposure to observability and monitoring tools (e.g. logging, metrics, tracing) Benefits - Competitive salary + employee share options - Remote-first work environment (UK-based team) with a collaborative team culture - Regular team meet-ups to foster team synergy and alignment - Work directly with the founding team – your leadership and decisions will have a visible, measurable impact - An open, transparent work environment where your voice is valued and your contributions directly shape the company’s trajectory - Clear growth path: as the business scales, you’ll have opportunities to expand your scope, ownership and influence

• Lead Scrum Masters managing a portfolio of work across complex, cross-functional delivery efforts. • Drive release train execution for a critical modernization program in support of EFTPS modernization. • Facilitate planning, coordination, and program-level Agile ceremonies to keep teams aligned on scope, priorities, dependencies, and delivery milestones. • Partner with stakeholders, delivery leaders, and teams to expand delivery capability and improve portfolio execution. • Provide leadership as a senior-level Agile Coach Advisor II / Release Train Engineer supporting large-scale, billable delivery engagements.