Senior Fullstack Engineer (f/m/d)

What you’ll do:

• Take operational problems from concept to production, working across our React/TypeScript frontend and Go backend services.
• Own modern interface security. Upfront is where external users act on real end-user data, so you will tackle per-client isolated environments, least-privilege access, and Auth0 integrations in a regulated space.
• Expand the operational surface across Upvest's internal domains and develop a deep understanding of how our core systems piece together.
• Help define how software delivery works in an AI-enabled company by pushing AI tooling to its limits to maximize quality and speed while staying compliant.
• Build agentic operations as we move toward exposing Upfront over MCP. Every action requires a strict audit trail, so you will solve real design problems around what an agent can do autonomously versus what requires human intervention.
• Work in weekly cycles with bi-weekly retrospectives to prioritize high-quality, high-frequency shipping.

What you bring:

• A strong product engineering mindset where you care about the "why" just as much as the "how" and proactively bring ideas to the table.
• Solid backend experience in Go, Java, or Kotlin (we build in Go but will give you time to ramp up).
• Practical experience building modern client-facing interfaces using React and TypeScript.
• Experience building products that require per-customer configuration without devolving into a custom fork per client.
• Deep knowledge of authentication, authorization, and security best practices.
• A strong focus on quality, extensibility, and automated testing.
• True end-to-end ownership across containers, CI/CD pipelines, and relational data modeling.
• A working understanding of event-driven architectures.
• A pragmatic approach to engineering and the ability to make smart tradeoffs under constraints.
• Real-world experience using AI tools to drive software engineering workflows, not only writing code snippets .
• The ability to navigate undefined problems and align other teams without needing formal authority. It’s great if you have:
• Experience with Investment products or the Fintech domain, in general.
• Experience building operational or back-office tooling for business users.
• Experience with identity platforms such as Auth0, or with multi-tenant isolation.
• Experience with operating services in a decoupled, event-driven system, leveraging modern observability tooling (e.g. monitoring and tracing). We offer How we Upvest in you:

• Best-in-class AI tools: Every Upvenger has €20,000 per year to spend on the best AI tools available — so you're always working with the most powerful models and tooling on the market.
• Impact-driven work: We’re building the infrastructure that will power the future of investing in Europe. It’s complex, ambitious, and meaningful. You’ll work with modern technologies and create something entirely new. No legacy systems, no limits.
• Wellbeing: Recharge with 30 days of annual leave and maintain a healthy lifestyle with sports benefits. Access confidential professional coaching and enjoy the flexibility to work remotely abroad for up to 183 days a year. Recharge with UpRest, a one-month fully paid sabbatical after every 4 years of working at Upvest.
• Development: Growth is in our DNA. Each Upvenger has access to a personal development budget and the freedom to decide how to use it.
• Flexible work environment: Work from any of our hubs in Berlin, London or Tallinn hybrid or remotely across Europe, depending on the role. We give you the choice and budget to work where you’re most comfortable and productive, either at home or in the office. You choose.
• Compensation and equity: We believe that all Upvengers contribute to our success and deserve a competitive, above-market salary and a participation in our employee equity program.
• Team celebrations: Participate in company-wide events, such as UpFest, dinners, offsites and our Holiday party, to connect with colleagues and celebrate our achievements.
• Inclusion: We’re committed to a culture where everyone belongs and thrives. Our Employee Resources Groups foster inclusion and connection, like Upfem for our female Upvengers, or UpVergent supporting neurodivergent Upvengers and allies.

Upvest is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.