Founding Software Product Engineer - Repli5 Platform

At The Flex, we believe renting a home should be as effortless as booking a ride. Our mission is ambitious: enable anyone to live anywhere, anytime, without friction. Powered by Base360.ai, our proprietary technology platform, we are building the operating system for modern renting—automating operations, connecting fragmented systems, and creating seamless experiences for guests, landlords, and operators across the world. We're looking for a Founding Software Engineer to help architect and build the technology that powers the future of The Flex. This is not a typical engineering role. You'll work directly with the founder, influence product strategy, make architectural decisions, and build systems that become the foundation of a global business. You'll have extraordinary ownership, responsibility, and impact from day one. WHAT YOU'LL BUILD As a Founding Software Engineer, you'll help create and scale Base360.ai—the technology platform that powers every aspect of The Flex. From AI-powered workflows and booking systems to operational automation and intelligent decision-making, you'll build products that directly impact revenue, efficiency, and customer experience. You won't just ship features. You'll create systems that replace manual work, unlock scale, and become a competitive advantage for the company. YOUR MISSION BUILD CORE PRODUCTS Design, build, and launch the software that powers bookings, pricing, payments, operations, communications, and guest experiences. ARCHITECT THE PLATFORM Make key technical decisions and help define the long-term architecture of Base360.ai. CREATE AUTOMATION AT SCALE Develop workflows and systems that automate operational processes across multiple countries and thousands of stays. LEVERAGE AI Build AI-powered tools, agents, and workflows that improve productivity, decision-making, and customer experience. INTEGRATE THE ECOSYSTEM Develop and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, Google, OpenAI, and other strategic partners. MOVE FAST Operate with urgency and ownership, turning ideas into production-ready solutions quickly and effectively. SOLVE REAL PROBLEMS Work on challenges such as: * Reservation synchronization * Dynamic pricing * Smart access management * Guest communication automation * Operational forecasting * Maintenance and cleaning automation * AI-powered alerts and monitoring * Revenue optimization HELP BUILD THE COMPANY As one of the first engineers, your influence will extend beyond code. You'll help shape processes, culture, product direction, and the future engineering team. TECH STACK Our current stack includes: * Python * FastAPI * React * TypeScript * Supabase * PostgreSQL * AWS * OpenAI APIs * Stripe * Twilio * Docker * GitHub Actions We care more about your ability to learn and build than your experience with any specific technology. WHAT WE'RE LOOKING FOR MUST HAVE * Strong software engineering fundamentals * Experience building production-grade applications * Strong understanding of APIs, databases, and system design * Product mindset and customer obsession * Ability to work independently with minimal supervision * Strong problem-solving ability * High level of ownership and accountability BONUS POINTS * Startup experience * Experience with AI products or LLM integrations * Experience building SaaS products * Experience with FastAPI, React, AWS, or Supabase * Marketplace, travel, or PropTech experience WHAT SUCCESS LOOKS LIKE Within your first year: * Critical company operations are automated through systems you've built * Base360.ai becomes a core competitive advantage * New products are shipped rapidly and reliably * Engineering velocity increases significantly * AI-powered workflows are embedded across the business * The platform is ready to scale internationally WHY JOIN THE FLEX MASSIVE IMPACT Your work will directly shape how thousands of people live, travel, and experience cities. FOUNDING-LEVEL OWNERSHIP You'll have significant influence over product, technology, and company direction. BUILD ALONGSIDE THE FOUNDER Work closely with leadership and help define the future of the business. LEARN FASTER Gain exposure to engineering, AI, product, operations, growth, and company-building. PERFORMANCE-BASED REWARDS Competitive compensation with meaningful upside for exceptional contributors. REMOTE-FIRST Work from anywhere. We care about results, not hours. THIS ROLE IS NOT FOR YOU IF * You're looking for a predictable corporate environment * You prefer maintaining systems rather than building them * You need constant direction and supervision * You avoid ownership outside your immediate responsibilities * You are uncomfortable with change, ambiguity, and rapid execution If you're excited by building products, solving hard problems, leveraging AI, and helping create the operating system for modern renting, we'd love to hear from you. #LI-Remote

WE'RE UNLOCKING ACCESS TO THE NHS, BECAUSE HEALTHCARE IS NOT TRULY FREE UNTIL IT'S TRULY ACCESSIBLE 💙 The world’s best healthcare, for free. It's not a new idea, it's called the NHS. But the largest healthcare provider is fundamentally broken. Patient satisfaction is at an all time low, and the biggest reason cited is lack of access. So we’re on a mission to fix it with technology that actually works. We're building the front door of UK healthcare, creating a future where one billion NHS appointments are transparent and instantly bookable, and patients are guided to the right service first time using AI. We're developing critical national infrastructure. Today, 26% of GP practices in England use our patient registration software, while one in five GP practices in London use Bookable Search to help new patients find and book appointments seamlessly. Our latest product, Bookable Navigator, extends this vision by automatically booking appointments for existing patients. We operate from within a working GP practice in East London 🏥 We're backed by Y Combinator, Innovate UK and the NHS Clinical Entrepreneur Programme, and were previously ranked the 8th fastest-growing startup in the UK and 33rd fastest-growing in Europe 🚀 ⛩️ OUR PRINCIPLES Exciting challenges lie ahead. Guided by our principles, we’ll meet these challenges with a thoughtful and caring approach. These principles drive everything we do at Healthtech-1: 1. 💙 Care deeply 2. 🏋️‍♀️ Work hard 3. 🤝 Be your word 4. 💬 Trust in radical truth and transparency 5.  🚀 Do your life's best work 6. 🥳 Find the fun Read more about our principles and our "why" in the Healthtech-1 Handbook. Why this role matters 35% of NHS staff time is spent on admin. That’s the opportunity. Our first product is already used by 26% of GP practices in England, and we’re now scaling a platform that transforms how patients and clinicians interact with healthcare. As one of our Senior Product Engineers ,you’ll own and shape the experiences used every day by patients and clinicians where performance, clarity, and reliability directly impact care. WHAT WE’RE LOOKING FOR We're reimagining how technology, data, and AI can empower every team across the business. You'll help build the platforms, tooling, and guardrails that enable teams to move faster while maintaining the highest standards of quality, security, and reliability. Our goal is to make it possible for anyone in the company to safely bring ideas to life and see their impact in production. Some of the challenges you'll tackle include: * Designing modern engineering workflows that accelerate delivery, increase autonomy, and improve developer experience across the organisation. * Building shared tools and platforms that make information accessible, discoverable, and actionable for every team. * Connecting knowledge across departments, enabling insights from customer conversations, support interactions, product discussions, and operational meetings to be surfaced whenever and wherever they're needed. * Creating a unified, queryable data ecosystem that breaks down silos and allows people to ask meaningful questions across the entire business. * Leveraging AI and automation to uncover opportunities, identify trends, and surface insights before anyone even knows to ask the question. * Developing systems that amplify the impact of individuals and teams by sharing best practices, highlighting successful approaches, and accelerating the adoption of new ideas across the company. This is an opportunity to work on foundational technology that influences how the entire organisation collaborates, learns, and delivers value to customers Our Tech Stack: * Fullstack (Backend leaning): React, TypeScript (core focus) * APIs: Designing and consuming scalable, well-structured services * Data: Working with production systems and performance considerations * AI: Integrating modern AI models into real-world healthcare workflows * Experience in scaling product environments or high-stakes domains (health, finance, infra) is a strong advantage. We’re based inside a GP practice, so you can walk downstairs and see the real-world impact of your work. Why join our engineering team: * Build technology that actually matters at national scale * Solve complex, meaningful problems with real-world constraints * Work in a high-performing, product-led team * Have real ownership, real responsibility, and real impact 💙 A BIT ABOUT US 💙 We’re all NHS staff. We’re inside-outsiders. Trusted with one of the biggest datasets in the world. 🏥 Our office is within a GP practice. This is our unfair advantage. Got a question? Pop down the corridor. Want to learn how your work affects real patients? Pop downstairs to reception. 💪🏼 4 days in the office and 1 day WFH (for most roles). We highly prioritise in-person communication and prefer candidates who want to work 4+ days a week in the office. Our anchor days are Mon, Tues, Thurs and Fri. Homemade breakfast and lunch are on the house every day when you're in the office, ensuring you're fuelled for success! 🌀 We work in growth cycles. Every 8 weeks we do the same set of activities. 1 week outside of Business-as-Usual to research, strategise, plan our work. 7 weeks to knuckle down and deliver it. 🤝 We’re highly collaborative. One of the benefits of a high trust team is we often work autonomously, but as a team we’re very collaborative by nature. Two heads are often better than one, and we frequently lean on each other to solve problems together. 🤜🏽 We’re backed by industry leaders. We’re on the DigitalHealth.London Accelerator, backed by the NHS Clinical Entrepreneur Program, winners of the London Business School Healthtech Challenge, Innovate UK, and Y Combinator (S23). 🚀 AN OPPORTUNITY FOR REAL UPSIDE 💉 Paid volunteer days. We offer an additional 2 paid days off per year where you can give back to your mission of choice. 🎢 Every 8 weeks we take a day off to socialise as a team. In the past we’ve hiked box hill, raved at All Points East and spent one rainy day at Thorpe park. This works out as 6 working days a year. 📚 Learning budget of £250 annually and time off to spend it - we care about this; this is flexible and based on need but everyone will receive a yearly allocation towards their continual growth. 🍽️ Homemade breakfast and lunch are on the house when you're in the office, ensuring you're fuelled for success! 🥡 Team takeaways every Monday night 🥗 Health and fitness budget of £60 per month - see more here 🧘‍♂️ An additional 7 days of paid leave is available if you want to take time to learn how to meditate. 💫 Tooling; You’ll have your choice of operating systems and any additional tools you need to do your best work (e.g. keyboard, additional monitors, mouse etc). If you’re on our Engineering teams you’ll receive the latest MacBook Pro and our Growth & Ops teams receives a MacBook Air. 🩺 We know health and family come first which is why we have a generous sick leave policy with additional days that can be taken for mental health leave. ✈️ We prioritise time outside of work to bond, once a year we’ll holiday together! Destination chosen by popular vote. In 2025, we spent 8 days in a surf camp in France! 👎 No private medical insurance, because we believe in the NHS and we are here to improve it! 🐥 Parental leave: Post passing probation it is: statutory - 6 weeks 90% pay then, SMP for 33 weeks; if you've been an employee for a year: 12 weeks 100% pay then, SMP for 27 weeks; and if you have been here for 2 years: 18 weeks 100% pay then, SMP for 21 weeks. This will improve over time. We also include up to £9,000 of childcare contribution for primary caregivers to support a five-day return where possible. 👪 Fertility leave. We understand how difficult a fertility journey can be. This is why we give an extra 5 days off per year if you or your partner are going through fertility treatment. 🐖 Pension - We operate a standard 3% employer contribution and employees auto-contribute 5% of their salary. We use Nest as our provider. 🏡 Local living benefit - A one-off benefit to support living closer to the office: £5,000 if you live within a 30-minute walk, or £2,500 within a 30-minute bike. It is optional, available immediately on signing, and not linked to performance or progression. 🚕 If you choose to work late in the office, you can expense dinner after 7pm and an Uber home after 9pm, or earlier if you feel unsafe travelling in the dark. This is optional and about wellbeing, not performance or expectations. ⛵️And of course, an adventure of a lifetime! 🌈 INCLUSIVE & DIVERSE BY DESIGN We care about building a product that is loved and a culture that is rich in perspectives, experiences, and backgrounds. Our team represents more than ten different cultures. We come together every lunch time for a home cooked meal, rotated among team members! We want everyone in our team to know that they belong. We are purposeful about this and are proactively building a company that is inclusive of all people; from race, religion, sex, sexual orientation, gender identity, age, neurodiversity, disability, colour, and national origin - essentially every type of diversity. We don’t just want people who fit in, we want them to fit together. We're active in continually improving the way we make this happen.