Senior Software Engineer

Sumup

About SumUp We believe in the everyday hero. Small business owners are at the heart of all we do, so we're creating tools that help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that the small business owners we partner with can be successful doing what they love.  Team Description The Lending team offers a fair, easy, timely, and financially relevant lending experience to small merchants. Empower small business owners to manage their financing independently of the stage of their business, either funding their growth, managing their cash flow, or covering their operational costs. Enable capital to be available to our merchants and consumers, always and everywhere. We are looking for our new Senior Engineer for our team responsible for developing and maintaining the backend two important pieces of our products: Risk Assessment and Dunning & Collection. This includes designing, implementing, and testing new features, as well as improving the performance and scalability of existing ones. What you’ll do * The goal is to improve the functionality and user experience of SumUp's lending platform and to ensure that it meets the needs of our merchants. * Design and develop Risk Assessment and Dunning & Collection micro-services, considering differences between markets; * Improve the performance and scalability of the systems; * Design and develop integration with external partners to enable growth. * Contribute to the development of a high-performing team. You’ll be great for this role if * More than 4 years of experience as a Software Engineer * Experience with Golang or other OOP languages such as Java, Kotlin, Python, etc.  * Experience in creating and maintaining simple components in React. * Experience with RESTful API design and development. * Experience with Git and Git workflows. * Experience with SQL and NoSQL databases, such as PostgreSQL It will be an awesome add * Good English communication skills to engage in technical refinements with an international team * Experience in a fintech/startup environment Why you should join SumUp * Opportunity to work with a truly global, multicultural team (we are 3000+ people from 93 countries, spread across 4 continents). * Learning & development budget for attending conferences and external training * Competitive salary package and virtual stock option program * Office relaxation activities such as yoga and massages regular brunches, football events, and office parties * 23 days paid vacation days * Additional health insurance and Multisport card * Restaurant ticket * An amazing team and work environment that works with passion and purpose to achieve incredible results SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of 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. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind. SumUp will not accept unsolicited resumes from any source other than directly from a candidate 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.

Bitpanda

WHO WE ARE  We simplify wealth creation. Founded in 2014 in Vienna, Austria by Eric Demuth, Paul Klanschek and Christian Trummer, we’re here to help people trust themselves enough to build their financial freedom — for now and the future. Our user-friendly, trade-everything platform empowers both first-time investors and seasoned experts to invest in the cryptocurrencies, crypto indices, stocks*, precious metals and commodities* they want — with any sized budget, 24/7. Our global team works across different cultures and time zones, bringing our products to more than 7 million customers, making us one of Europe’s safest and most secure platforms that powers modern investing.   Headquartered in Austria but operating across Europe, our products are built by fast-moving, talented, “roll-up-your-sleeves-and-make-it-happen” kind of people. It’s these diverse perspectives and innovative minds operating as ONE TEAM that keep Bitpanda at the cutting edge of our industry. So if you’re someone who thinks big, moves fast and wants to make an impact right from day one, then get ready to join our industry-changing team. Let’s go!   YOUR MISSION Build the ultimate gateway to our ecosystem. Designing, scaling, and maintaining the critical systems responsible for safely and efficiently onboarding millions of users across Europe will be your primary focus, all while adhering to strict financial regulations. In this role, tackling complex architectural challenges—such as integrating with cutting-edge third-party identity providers and orchestrating real-time compliance workflows—goes hand in hand with collaborating closely with our Product, Legal, and FinCrime teams to turn complex regulatory requirements into smooth, automated user experiences. WHAT YOU’LL DO * Your day-to-day responsibilities will involve designing and developing scalable, resilient, message-driven services using Java to manage complex user verification pipelines. * Writing clean and correct code with high test coverage is essential as we continuously deploy into an event-driven microservices architecture. * Integrating cutting-edge third-party tools will require taking ownership of our connections with global KYC providers, video-identification services, and AML screening databases. * Ensuring a seamless onboarding experience means optimizing our backend systems to minimize user friction while maintaining absolute regulatory compliance and system reliability. * Close collaboration with cross-functional teams, such as Product Managers, Compliance Officers, and security experts, will be key to rapidly adapting to changing regulatory landscapes. WHO YOU ARE * Solid knowledge and professional experience in backend software development using Java and modern frameworks like Spring Boot form the foundation of your technical skill set. * A deep understanding of relational and non-relational databases is required, with hands-on experience in Postgres and MongoDB being a distinct advantage. * Practical knowledge of message-oriented middleware, specifically Apache Kafka, is necessary to successfully handle high-throughput, asynchronous onboarding events. * Creating, securing, and maintaining publicly available REST APIs is something you handle with a keen understanding of performance optimization, data privacy, and scalability. * Familiarity with modern CI/CD pipelines and practical public cloud experience, preferably utilizing AWS and Kubernetes, rounds out your engineering profile.     WHAT’S IN IT FOR YOU * Flexibility to work where you thrive – Enjoy the freedom of our Hybrid working model, combining onsite collaboration and remote work, with an additional 25 days per year to work from a city or country of your choice. * Reward for your impact – Receive a competitive total compensation package aligned with Bitpanda’s pay-for-impact policy, including participation in our stock option plan. * Support for your mental wellbeing – Access confidential coaching, counselling, and mental health resources whenever you need them through OpenUP. * Time to recharge – On top of your standard annual leave, Prioritise your wellbeing with 3 additional days of paid time off to rest, reset, and recharge, available once you’ve been with us for 6 months. * Continuous learning and growth – Grow your skills and stay ahead in your career with unlimited access to Udemy’s library of online courses at your own pace. * Exclusive perks and rewards – Enjoy discounts, rewards, and perks from partners worldwide across lifestyle, wellness, tech, and travel. * Support during life milestones – Take advantage of our additional 8 weeks of gender-neutral new parent leave to welcome and bond with your new addition to the family. * Fuel and focus on-site – Pandas in Vienna, Bucharest, Barcelona, and Berlin can enjoy free onsite dining, with freshly prepared lunches and snacks to keep you fueled and focused all day long. * Recognition for your contributions – Celebrate milestones and achievements with recognition and rewards for your Tenure at Bitpanda. * Show your Bitpanda pride – Access exclusive Bitpanda-branded merchandise and gear to represent. * Connect and celebrate with your team – Join unforgettable company events, from our Winter Party in Vienna to gatherings worldwide, fostering fun, connection, and celebration        .…and even more location-specific benefits designed to make life at Bitpanda even more rewarding wherever you are.   Above all, you will have the opportunity to learn and grow as part of Bitpanda’s incredible journey towards being Europe’s future #1 investment platform. BITPANDA IS COMMITTED TO FOSTERING A FAIR AND EQUAL ENVIRONMENT BASED ON TRUST AND MUTUAL RESPECT. WE BELIEVE THAT A DIVERSE AND INCLUSIVE WORKPLACE IS PARAMOUNT TO OUR SUCCESS AND WE ARE COMMITTED TO BUILDING A TEAM THAT REPRESENTS A WIDE VARIETY OF BACKGROUNDS, PERSPECTIVES, AND SKILLS. * THESE BENEFITS MAY BE ADJUSTED AT BITPANDA’S DISCRETION AND DO NOT APPLY TO OUR INTERNSHIPS AND EXCEPTIONS TO OUR HYBRID WORKING POLICY APPLY TO TEAMS WITH SHIFT SCHEDULES OR FOR FOLKS WHOSE ROLES REQUIRE THEM TO BE IN-OFFICE (THINK: WORKPLACES TEAM OR IT).

Proton

About Proton  Join Proton and build a better internet where privacy is the default Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives! We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here! The Role Based in our Barcelona office, you’ll join one of several high-impact product teams across Proton Pass, Proton Wallet/Payments, and Proton VPN, helping build privacy-first products used by millions around the world. From secure password management and identity protection to encrypted financial tools and internet freedom products that help users bypass censorship and surveillance, you’ll work on technically ambitious products with real-world impact. As a senior engineer, you’ll collaborate closely with product, design, and engineers across Proton to build and ship high-quality experiences on Apple platforms, helping define what “great” looks like for privacy-focused consumer products at scale. What we are looking for * You have extensive experience building and shipping high-quality iOS applications * You care deeply about product quality, usability, and delivering exceptional user experiences * You have strong experience building maintainable, scalable, and testable mobile architectures * You are comfortable working across large codebases and collaborating across multiple teams * You have experience mentoring engineers and raising the technical bar within a team * You have a strong understanding of performance, concurrency, and mobile memory management * You are comfortable navigating ambiguity and contributing to product and technical discussions * Experience with privacy, security, encryption, sync systems, or offline-first architectures is a strong plus * Rust experience is a plus, but not required as we continue moving towards a platform-independent Rust logical core communicating with the iOS application via generic interfaces What We Offer * Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here) * Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win. * Technology: you'll get the right hardware and the right software you need to do your best work. * Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one. * Employee Benefits: your wellbeing isn't an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day * In-Person Collaboration: Amazing things happen when passionate, smart, and purposeful people get together in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face with people who genuinely care about what they're building * Food: Lunch and snacks are on us every day in our offices so you can focus on the work and not on what's for lunch. * Transport: getting to the office shouldn't cost you. We cover public transport, bike allowances, or parking, whichever works for you. * Flexible Working: you own your schedule. Set hours that work for you and your team — because outcomes matter more than when the clock says you started.