Senior Software Engineer, Java

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 Cobalt Streamworks 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 Cobalt Streamworks’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 Cobalt Streamworks. Show your Cobalt Streamworks pride – Access exclusive Cobalt Streamworks-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 Cobalt Streamworks even more rewarding wherever you are. Above all, you will have the opportunity to learn and grow as part of Cobalt Streamworks’s incredible journey towards being Europe’s future #1 investment platform. Cobalt Streamworks 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 Cobalt Streamworks’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).