Senior Software Engineer

Senior Software Engineer Office Location: Temple, London - hybrid working environment (3 days in office per week) Experience Level: +5 years commercial software engineering experience About Investa Investa is building the UK’s first zero-commission Options and Stocks trading platform. Legacy platforms typically feature high fees and complex interfaces that cut out the majority of retail investors. We are building a streamlined alternative to fix that. Investa is the first FCA-regulated platform to offer completely free US share trading with no FX, no commission, and no other fees. Our Traction So Far: £3.5M+ raised in funding with 1,000+ shareholders backing our vision FCA-regulated and multi-award winning in 2026: Best Options Trading App (Good Money Guide) & Best App for Options Trading (ADVFN) Available on iOS and Android, scaling rapidly toward our next milestones of 10,000 and 100,000 active users 8,000+ trades processed, 2,500+ early supporters rewarded, and 150+ 5-star reviews Our Mission: To democratise options trading for UK investors Our Vision: Think Options, Think Investa We are a lean, agile team where every employee directly shapes the business. We don't have a corporate way of working. Instead, we look for people who want high autonomy, care about making a visible impact, and align with our core values of being Collaborative, Curious, and Creative. We are growing and looking for ambitious talent to help us democratise retail investing across the UK. The Role The Investa app was installed over 1,000 times within the first 24 hours of our priority access launch and we’re now looking for a high-impact Senior Software Engineer to join our founding engineering team as we scale. You will have extensive commercial experience designing, building and maintaining systems used in critical services or those handling significant volumes of activity.   You will play a crucial role in building key parts of our platform and apps, ensuring the robustness, scalability, and security of our systems.   If you’re passionate about building best-in-class products to tackle complex challenges and you excel in a collaborative, fast-paced environment, we want to hear from you.   What the role involves Founding Team Ownership: Designing, building, and maintaining robust, scalable services by joining our founding team of 4 engineers. Working directly with the founders with zero middle-management red tape, you won’t just pull tickets from a backlog - you will actually own your work end-to-end, see your code ship, and see its immediate impact on users. Building the Engineering Culture: Joining our founding engineering team means you are actively building our engineering culture, not just stepping into one. You will have a direct voice in shaping how we collaborate day-to-day, how we learn from each other, and how we preserve a friendly, agile, and tight-knit environment as we grow. Full-Stack Versatility & Growth: Hands-on Building: Writing high-quality, secure code for our FCA-regulated platform. You’ll navigate our stack to ship features that delight users. Driven by our fast-paced environment, you will have the opportunity to step outside your comfort zone and get hands-on with the wider technical stack, levelling up your skills significantly faster than in a traditional, highly specialised role. System Design & Architectural Influence: Partnering directly with the CEO and Principal Engineers to tackle complex systems design and actively shape our evolving architecture. Your technical perspective will give you a strong voice in our high-level design choices. You will have true design ownership over the specific services and systems you build, ensuring they remain robust, secure, and performant as we scale. Technical Excellence: Maintaining a high bar for code quality, testing, and documentation. You’ll participate in (and drive) meaningful code reviews. System Integrity: Monitoring and