Fullstack Engineer (Backend leaning)

Apron

ABOUT APRON Apron is building something game-changing. Founded in 2021, Apron set out to help SMBs win. Small businesses are the backbone of the economy, yet the systems they rely on (particularly around payments) are slow, manual and not built for them. The biggest threat to small business is cash flow, often stemming from a gap between the demand payments put on owners and the aptitude to make the payments effectively. Apron changes that. We are closing the gap by digitising and simplifying the payments process: capturing invoices, issuing expense cards, paying and getting paid, all in one place. We have grown fast over the past few years, expanding our team to circa 100 individuals across the UK, Germany, Spain and more. We are backed by Index Ventures, Bessemer Venture Partners, Zinal Grow and Tony Fadell and we’ve raised $50m. The ambition from here is not incremental growth. Apron is building a category-defining, global fintech business with a clear path to significant revenue scale and international expansion. The next phase requires not just great products and ambition, but a world-class Engineering team.   ABOUT OUR ENGINEERING CULTURE Engineers at Apron are at the heart of what we do. Here's what that means: * We build with the customer in mind. We use top-tier technology to build a product that genuinely makes their lives easier. * We own our work. We plan the approach, break it down, and bring it to life! * We embrace the complexity of finance. Working with money means navigating intricate business logic and thinking through every possible corner case. It’s a rewarding challenge where precision and attention to detail are crucial for building a trustworthy product. * We write code we're proud of. We work fast, but we build for the long term. Our code needs to be speedy, secure, and ready to grow with us. * We integrate AI tools. We use what's best out there to build a product that genuinely makes lives easier.   WHAT YOU’LL OWN We're hiring more than one engineer for different teams as we're scaling to new products and features. This means: * You'll work cross-functionally with Frontend Engineers, Product Managers and Product Designers to develop new products and features for some of our product verticals Capture, Bill Pay, Apron Card and GetPaid and some horizontals like FinCrime. * You’ll design systems and develop core financial integrations to guarantee customer funds are secure and transactions are routed with market-leading speed. * You’ll share your experience with others, driving innovation, proactively suggesting improvements.   WHAT YOU’LL NEED * 6-15 years of continuous experience as a backend engineer or Backend-leaning fullstack * Experience working in a product-led + fast-paced environment (startup or tech company). * Experience with relational databases. * Working knowledge of cloud platforms, with preference for Google Cloud Platform. * Keen attention to code quality, passion for efficient architecture, and commitment to optimising performance. * We use Kotlin for server-side development. While Kotlin proficiency is not mandatory, readiness to work with it is essential.   WOULD BE A HIGHLIGHT IF YOU: * Are proficient in Kotlin, for server-side development. * Have hands-on experience with Kubernetes and Terraform. * Have experience with advanced Postgres features like GIST indexes, partitioning and replication.   WHAT WE OFFER 💷 Highly competitive salary + meaningful stock options 📈 Pension plan with Nest 🏥 Health insurance (including Optical and Dental cover), Life Assurance 🚼 Enhanced parental leave 🥗 Weekly Deliveroo allowance 🌴 29 days of holidays (on top of Bank holidays) ☕ Flexible working hours 📍 Hybrid work 3 days a week in our London (Liverpool Street) offices. 🚲 Cycle to Work scheme, Electric vehicle scheme 🌍 Visa sponsorship (if applicable) OUR HIRING PROCESS Our process is straightforward and runs at your pace. We provide feedback in 24hrs. * Interview with our Recruiting team (30min) * Live Coding session (45min) * System Design Interview (60min) * Final interview with our Leadership team (60min) * Offer in 24hrs 🔥

Stripe

WHO WE ARE ABOUT STRIPE Stripe is a financial infrastructure platform for businesses. Millions of companies - from the world's largest enterprises to the most ambitious startups - use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. ABOUT THE TEAM Exact team matching for one of the subteams within the following orgs will begin during final stages. If you have a strong preference for a specific org, please flag this to your recruiter during your recruiter screen. Money as a Service (MaaS) Money as a Service is a new org within Stripe which is all about making money programmable through funding, FX'ing, sending, and spending. The Money as a Service (MaaS) teams build the APIs and product experience that allow Stripe users to perform these money management capabilities on Stripe globally. We've recently launched several products. * Multicurrency balances * Global Payouts Payments and Risk The Payments organization focuses on developing products and platforms that enable users to accept payments from customers efficiently. This includes building APIs for processing payments, enabling regional, non-card payment options, and extending Stripe's capabilities to make it easy for businesses to accept in-person payments. Optimized Checkout and Link teams work to create best-in-class checkout experiences that enhance customer satisfaction and drive merchant conversion rates. The Risk Engineering team develops products that minimize financial and regulatory risks while ensuring a seamless user experience, thereby safeguarding Stripe's brand and financial stability. WHAT YOU'LL DO We're looking for backend, frontend-leaning fullstack, and fullstack engineers who are interested in building software services and platforms that impact thousands of employees and millions of Stripe users, regardless of whether they're an end user, developer, or partner. RESPONSIBILITIES * Scope, design, build, and maintain APIs, user experiences, services, and large-scale systems that reliably and efficiently handle billions of money movement requests * Debug and solve critical production issues across services and multiple levels of the stack * Mentor engineers to help them grow * Meet directly with our users to help shape product changes * Collaborate with stakeholders across the company to build new features at large-scale, while improving internal engineering standards, tooling, and processes * Collaborate effectively in a distributed and hybrid team, maintaining open communication and strong connections with colleagues WHO YOU ARE We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement. MINIMUM REQUIREMENTS * 2-12+ years of industry software engineering experience (does not include internships or co-ops) * Strong coding skills in any programming language (we understand new languages can be learned on the job so our interview process is language agnostic) * Strong collaboration skills and the ability to work across workstreams within your team and contribute to your peers' success * Ability to thrive with a high level of autonomy and responsibility, and an entrepreneurial mindset * Interest in working as a generalist across varying technologies and stacks to solve problems and delight both internal and external users PREFERRED QUALIFICATIONS * * Experience building user interfaces * Experience with user research or interaction design * Experience designing and building APIs

9fin

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets. Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption. We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide. WHAT YOU’LL WORK ON * As part of a cross-functional team, contribute to projects by helping design systems, building proof of concepts, and delivering new service functionality — including APIs, data processing, and automation — while collaborating closely with Product and Clients. * Development and engineering primarily on backend services and web-application–hosted tools and systems within the 9fin platform. * Play an impactful role within project teams as an individual contributor, participating in code reviews, collaborating with peers, and contributing ideas during research and experimentation with new technologies. * Continually improve the 9fin codebase by taking opportunities to automate, refactor, and document where it’s most valuable. * Work across a diverse set of web platforms, including financial data modelling, access-control business logic, environmental and emissions data capture, integration with ML/AI prediction services, data visualisation, and automation systems. * Collaboration and teamwork: All projects are delivered by cross-functional teams that include domain expertise from 9fin’s financial, legal, and editorial colleagues. You’ll work closely with non-technical stakeholders and help explain technical concepts in a clear, accessible way to support effective team progress. * Developer experience: You’ll work within a strong developer experience setup, including automated preview environments, feature flags, and well-maintained non-production environments, enabling rapid iteration and feedback. Our Backend Stack * Python is the dominant backend language used * Flask & FastAPI * Typing is used within our Python stack to power automated documentation and API definitions * Relational Databases (PostgreSQL) at the heart of majority of services * We have our own internal developer platform with standardised paved road approaches to infrastructure to bring your code into production as quickly as possible. * We’re AWS for Cloud hosted services * Heavy use of AWS lambda Serverless * Docker (AWS ECS) for uniform development/deployment from dev to prod Requirements This role will be a great fit if you: * Have experience working as a Full-Stack or Backend-leaning Engineer within a product team, contributing to system design discussions and delivering production software. * Can plan and reason about software effectively, clearly communicating how your work fits into larger systems and delivers value to clients. * Have hands-on experience designing and implementing data flow through software, from persistent storage to API endpoints, applying industry best practices for validation and reliability. * Have experience with Python and web frameworks (we currently use FastAPI with strong typing and Pydantic). * Have experience building and consuming APIs, ideally within a service-oriented architecture. * Have a working knowledge of SQL for querying and working with relational data. * Are a collaborative and proactive communicator, comfortable working with engineers and non-engineers across the business. * Care about code quality, writing testable and maintainable code, and actively participating in code reviews — both receiving feedback and reviewing others’ work. Benefits We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel. Financial & Insurance * Competitive Salary (our salary bands are benchmarked at the top end of the market) * Pension (your minimum contributions are 4% with 9fin matching up to 7%) * Private Medical Insurance * Paid sick leave with Income Protection for long periods of illness * Group Life Assurance * Season Ticket Loan & Cycle to Work schemes Time off * 25 holiday days per year * Local public holidays (with the ability to exchange them for alternative days) * Hybrid working model, to allow you the flexibility to decide how, where and when you do your best work * Work abroad for up to 3 months a year * 1 month paid sabbatical after 5 years of service * Enhanced parental leave & flexible working arrangements available Training & Culture * Professional learning and development budget * Quarterly team socials * Summer and Winter company social events 9fin is an equal opportunities employer At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for — either for this role, or perhaps another.