Senior Backend (Full-stack) Engineer

About Rivia Rivia is a technology company building a data engine that powers the future of clinical trial intelligence. Rivia was founded on the belief that new drugs can be brought to market more successfully with a fraction of today's capital. Biotechs are the source of most therapeutic innovation, yet clinical development is constantly constrained by fragmented data and outdated tooling. Rivia unifies clinical trial data at scale through a core engine built as a reusable intelligence layer, comprising hundreds of configurations and trial-specific logic, independent of source structure. This vertical stack of data engine, workflows, and agents creates a distinct advantage in how trials are operated. Over the past two years, European and US based biotechs running global clinical trials on Rivia have demonstrated measurable impact, from earlier understanding of therapeutic potential to significantly more efficient trial execution. In March 2026, Rivia raised its $15M Series A led by Earlybird Venture Capital. Rivia’s ambition is to become the standard infrastructure for modern drug development, transforming how trials are executed end-to-end. The Role As a Senior Backend Engineer, you will lead the design and implementation of scalable backend services and data infrastructure that power our clinical trial data platform. You will own major parts of our backend architecture, from APIs and data models to integration with cloud services and machine learning components, while being comfortable contributing across the stack when needed. You will collaborate closely with product, data, and frontend teams to ship high-quality features iteratively and help shape the future of our platform. To succeed in this role, you should have a passion for iterative product development and possess a strategic, analytical mindset. You should be comfortable navigating the uncertainties of a startup environment, adaptable to shifting priorities, and driven to transform the pharmaceutical industry. Embrace the challenge of building the future of clinical trial technology and help realize Rivia's vision of becoming the definitive unified data infrastructure for clinical trials. Our stack Some technologies we use today: Typescript, React, Java, Python, Spring, Postgres, GPT-4, AWS, Kubernetes. There's no need to be a prior expert in our stack; it's more important that you learn new technologies quickly. What excites you Building high quality software that delights end users Owning the architecture, implementation, and operation of core backend services and APIs. Designing robust data models and storage patterns that make complex clinical trial data manageable and performant. Solving hard problems around scalability, reliability, and performance in a data-heavy environment. Thriving in a fast-paced startup environment where you have autonomy over your work and make strategic decisions that impact users and the team Working with cloud infrastructure and modern tooling to build secure, observable, and maintainable services Responsibilities Design, build, and maintain backend services and APIs (primarily in Java/Spring) that power our clinical trial platform. Model, store, and query complex data efficiently in Postgres and related data systems. Implement and maintain integrations and pipelines that ingest and process data from multiple sources. Collaborate with frontend engineers to define API contracts and, when needed, contribute full‑stack changes to ship complete features. Ensure high availability, observability, and security of backend services through monitoring, testing, and sound operational practices. Participate in technical planning, code reviews, and knowledge sharing to continuously improve the team’s effectiveness. What Excites us Strong experience building and operating backend services in production, ideally with Java, Spring, and relational databases like Postgres. A solid understanding of system design, data modeling, and performance optimization for data-intensive applications. Experience working with cloud platforms (e.g., AWS) and containerized environments (e.g., Docker/Kubernetes). A track record of taking ownership of projects, from design through to deployment and maintenance. Ability and willingness to work across the stack when required to deliver high-quality product experiences. Clear communication, collaborative mindset, and enthusiasm for working in a fast-moving startup environment. Hiring Process Our hiring process takes 2-4 weeks over four distinct stages: Meet and greet: 30-minute call with the HR team to get to know each other. This is an informal chat. Technical Screening: 60-minute interview to delve into high-level technical concepts and your problem-solving approaches. Coding Interview: 60 mins with the team to assess your coding skills. Meet the team: 3-4 hours. Join us at our Zürich office for a visit that includes a team lunch and an in-depth technical interview to explore our mutual fit. Our Values At Rivia, we are committed to excellence, continuous learning, and the success of both our customers and our team. If you are driven to exceed targets, eager to shape the future of clinical trials, and passionate about making a meaningful difference in the biotech industry, Rivia is the place for you. In it to Win it: Approach every challenge with determination, resilience, and a drive, aiming for the best outcomes and solutions. Embrace change: We see change as an opportunity for growth, innovation, and improvement, continuously evolving to stay one step ahead Why not?: Asking why not, instead of why, allows us to show our curiosity, allowing us to challenge assumptions and explore new possibilities. Find the gap: We are curious and we proactively approach identifying opportunities and solving problems before they arise. Collective accountability: We are one team, on one mission and we are committed to shared responsibilities and mutual support, enabling trust and collaboration. Value add solutions: Know better. Act better. We are dedicated to delivering meaningful and impactful results. Find Jobs in Switzerland on Arbeitnow