Senior Product Manager

About 1st Formations At 1st Formations, we empower entrepreneurs to start, run, and grow their businesses with confidence. Running a business shouldn’t be slowed down by company formation, statutory compliance, accounting, or payroll. From day one, these essentials should be seamless, reliable, and intelligently handled — freeing founders to focus on building and scaling. We’re a leading UK provider of company formation and compliance services, building a modern, fully integrated technology platform that supports founders at every stage of their journey. Our platform brings together formation, compliance, accounting, payroll, and ongoing business support in one cohesive experience. No stitched-together services. No legacy workflows disguised as software. Just a single, scalable platform built for ambitious founders who want to move fast, stay compliant, and grow with confidence. Why Join Us Now? You’ll be joining a business with strong momentum, clear direction, and real opportunity for progression. · £18m annual revenue, including £9m ARR · Over 1 million companies formed · Certified B Corp and Carbon Neutral Business · Forecast to grow 5x–10x over the next three years The Role We're looking for a Senior Product Manager with strong technical depth, particularly around APIs and integrations, to help shape the evolution of our platform. You'll own product strategy and execution for key areas of our integrated formation, compliance, accounting platform, balancing user needs, technical feasibility, and business goals as we scale. As a thoughtful, technically fluent problem solver, you'll work closely with engineering to define API and integration strategy, partner with design on user-facing experience, and work with compliance to ensure regulatory requirements are met. You'll use data and user insights to prioritise the roadmap, and you're comfortable getting into technical detail with engineers, reviewing API contracts, understanding integration architecture, and making informed trade-offs on build vs. buy or partner integrations. This is a hands-on senior role in a fast-paced environment where strong technical judgement, ownership, stakeholder communication, and a deep understanding of both user needs and system architecture are essential. If you're excited about building a platform that's genuinely integrated rather than stitched together and want to own product decisions from strategy through technical execution, we'd love to hear from you. Key Responsibilities · Own product strategy and roadmap for key platform areas, including integrations with third-party services (e.g. Companies House, accounting/payroll systems, payment providers) · Define and prioritise the API and integration roadmap, working closely with engineering on technical design and architecture decisions · Translate business and user requirements into clear technical specifications engineering can build against · Partner with engineering to evaluate build vs. buy decisions and assess third-party integration partners · Work with design to ensure user-facing experiences are well-supported by underlying technical architecture · Partner with compliance to ensure new capabilities meet regulatory requirements (particularly relevant given the company formation/compliance context) · Define and track product metrics, using data to inform prioritisation and validate outcomes · Communicate roadmap, trade-offs, and technical constraints clearly to senior stakeholders and cross-functional teams · Run discovery with users and internal stakeholders to validate problems before committing engineering resource · Mentor and support the development of other product managers, where applicable What we are looking for · 8+ years of product management experience, with a track record of increasing scope and ownership · Strong technical background, with hands-on experience working with APIs, integrations, and system architecture (e.g. having worked closely with engineering on integrat…