
Stripe · N/A
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 ...
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.
Web Presence and Platform is organized into two pillars, each of which is grouped into pods that focus on the central tenets of
the Stripe public mission. The Presence pillar creates industry-leading designs for Stripe front door surfaces, educating
customers about the power of our platform, sharing ideas and expertise with the public, and driving adoption. The Platform pillar
builds the internal machinery that powers these surfaces, and is responsible for making our websites fast, stable, and easy to
update.
Together we design and build stripe.com and other sites that amount to what is, for many, their first impression of Stripe. As
such, WPP offers exciting opportunities to have a major impact on Stripe success. We want to make every pixel count, we want it to
be enthralling, and we want to help other Stripes seamlessly benefit from our systematic work.
While the team's mission anchors to web surfaces, this role lives deeper in the stack. You'll be the engine behind the experiences
rather than the pixel-level presentation—APIs, data pipelines, model orchestration, and service reliability that make LLM-driven
user experiences possible at scale.
The Expansion pod brings creativity and executional rigor to attracting new prospects and driving conversion, focusing on user
journeys, interactive and highly polished tools for users, and building targeted experiences for our global users.
As a full stack engineer, you'll architect and build the server-side systems and LLM orchestration layers that power intelligent,
dynamic user experiences across acquisition journeys. You'll design the APIs, data pipelines, and inference infrastructure behind
delightful and original interactive tools and resources that attract users. You'll collaborate deeply across design, engineering,
and cross-functional teams and work across teams and tech stacks to create new site capabilities—with a specific focus on
integrating large language models into production-grade services that are reliable, performant, and safe.
This is not a research or ML training role. You'll be responsible for wiring LLMs into real user-facing products—managing prompt
pipelines, handling model routing and fallback logic, and implementing guardrails and output validation.
that provide utility to current and prospective businesses
potential to the rest of Stripe
filtering, PII handling, rate limiting, graceful degradation, and output guardrails
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.
or function calling. You don't need to be a researcher, but you understand how these models work well enough to build
production systems around them.
processing, caching layers, and monitoring and alerting in production
swap or compare providers (e.g., OpenAI, Anthropic, open-source models) • Proficiency with React, with a focus on interactions,
animation, performance, and polish • Experience with A/B testing, synthetic monitoring, or accessibility testing
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 Web Presence and Platform (WPP) is organized into two pillars, each of which is grouped into pods that focus on the central tenets of Stripe's public mission. The Presence pillar creates industry-leading designs for Stripe's front door surfaces, educates customers about the power of our platform, and drives our business success. The Platform pillar builds the internal machinery that powers these surfaces, and is responsible for making our websites fast, stable, and easy to modify. WPP offers exciting opportunities to have a major impact on Stripe's success, as stripe.com is often a user's first impression of the company, and the vast majority of signups come via the website. We'll apply data-driven rigor to our curiosity, and we'll come up with clever ways to get insight into important questions. We'll have the leeway to test out-of-the-box ideas alongside incremental ones. We'll apply Stripe's users-first mentality both internally and externally, crafting tangible productivity and quality-of-life improvements for colleagues while maintaining and elevating the quality of stripe.com. WHAT YOU'LL DO As a software engineer, you'll design and build platforms and services that are configurable and scalable around the globe. You'll partner with many functions at Stripe, with the opportunity to both work on infrastructure and platform systems and produce direct user-facing business impact. Organizations is one of Stripe's biggest bets. You'll join a team with an ambitious and exciting goal at an early stage, with several opportunities to solve complex engineering problems at scale. If this sounds exciting, we'd love to speak with you. RESPONSIBILITIES * Design, build, and maintain scalable, reliable, and performant services and systems * Work with a wide range of systems, processes, and technologies to own and solve technical and product problems * Build and launch new capabilities and products that bring significant value to customers * Uphold our high engineering standards and elevate quality and engineering efficiency within our many codebases and processes * Collaborate with stakeholders across the organization including dependency engineering teams, product, design, infrastructure, and operations * Debug production issues across services at multiple levels of the stack 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 * Strong technical background, including 3+ years of experience as a backend engineer, with an affinity for building scalable backend infrastructure * Experience delivering, extending, and maintaining large-scale distributed systems * Empathetic, collaborative, and user-first mindset in everything you build * Interest in working as a generalist across varying technologies and stacks to solve problems and delight both internal and external users * Ability to stitch together many different services even if you haven't worked with them before * Preference for simple solutions and designs over complex ones and good intuition for what is lasting and scalable * The skills to build holistically—from specs and documentation to implementation, testing, deployment, and measuring impact * Ability to work well cross-functionally and earn trust from colleagues at all levels * Experience mentoring and growing junior engineers as their technical leader PREFERRED QUALIFICATIONS * Fellow engineers feel they are able to learn from you, and you care deeply about mentoring others * Propensity to ask questions, assume good intentions, and default to transparency * You are often cited as the inspiration for engineers who join your team * You've worked to build pricing tooling that scales
Our Billing and Subscriptions team sits at the heart of how SumUp's merchants pay for, manage, and grow with our products. We own the billing engine, merchant wallet, and subscription experiences that underpin millions of transactions across 37 markets, and right now, we're in an exciting phase of rebuilding and expanding that foundation. We're deepening our billing capabilities to support new sales models, market expansions, and financial integrations that directly shape how small businesses experience SumUp — and this role is central to making that happen. What you'll do * Build and maintain backend services and frontend interfaces across our billing, contracts, and merchant wallet products * Contribute to the refactoring of key billing components to improve reliability, data security, and alignment with our wider payments platform * Support the expansion of our billing and wallet capabilities into new markets, helping ensure localisation requirements are met * Take part in our weekly support rotation, handling incoming customer queries and helping maintain platform stability * Work closely with senior engineers and product managers to deliver features end-to-end, from implementation through to production You'll be great for this role if * Solid experience building full stack applications, with a backend focus. Ideally comfortable with Node.js or Go, though we're open to other backend languages. * Comfortable working with both relational databases such as PostgreSQL or MySQL and non-relational databases (such as DynamoDB, MongoDB, or Redis). * Practical frontend experience working with React and Next.js, with the ability to write clean, typed code in TypeScript or JavaScript. * Strong communication skills in English, both written and spoken, with the ability to give and receive clear, constructive feedback. * A pragmatic approach to problem-solving, able to make sensible trade-offs, unblock yourself and others, and write clean, maintainable code. Why you should join SumUp * 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup * 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced * 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education * 💶 A corporate pension scheme where we match up to 20% of your contributions * 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days * 🏙 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches * 🌴 Break4me: 1-month sabbatical after 3 years of service * 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok. Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
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.