Senior Software Engineer, Core Team

We’re building a new kind of payments platform from the ground up, designed for speed, resilience, and developer freedom. If you’re a systems engineer excited by Rust for high-performance systems, Haskell for compiler design and static analysis, WebAssembly (Wasm) for secure runtimes, and the challenges of a greenfield project, this is your chance to shape the core of the product.

About Rivero

Established in 2019 and headquartered in Switzerland, Rivero is a fast-growing European company and a Visa Fintech Partner specialising in streamlining payment operations within the highly regulated payments industry. We focus on offering unique SaaS solutions for fraud recovery, dispute management, and payment scheme compliance.

Rivero strives to stand as a front-runner in the industry, offering best-in-class SaaS solutions that combine innovation with deep expertise. We are looking for an ambitious and driven person to join us for the exciting phase ahead.

What is it like to work at Rivero

At Rivero, we:

• Act with urgency, working in fast, iterative cycles to deliver meaningful results quickly. We take initiative and collaborate effectively to keep things moving forward.
• Strive for excellence, taking ownership of our work and delivering high-quality outcomes. We hold ourselves accountable, continuously improve, and aim to exceed expectations in all areas across the organisation.
• Embrace growth as both individuals and as a company. We are ambitious, open-minded, and focused on learning from every challenge.
• Follow an open-book management approach: We are fully transparent, sharing not only the information you need to do your job but also providing insights that help you understand how Rivero is doing as a whole. We want to ensure that everyone is equipped to make informed decisions and contribute to our overall success.

Sounds exciting to you? Do you have such characteristic traits? Do you want to be part of our team? Then continue reading!

What we’re looking for

At Rivero, we’re building a greenfield, next-generation payment processing system. Our vision is to empower clients to design and run their own custom workflows in an orchestration-focused, payments-oriented FaaS environment with a bring-your-own-code philosophy.

This means tackling:

• High-performance execution: Architecting a system for real-time, concurrent workloads with zero downtime.
• Secure sandboxing: Building the core of our platform using WebAssembly (Wasm) to safely run untrusted, third-party code.
• Fast delivery: Balancing strong technical foundations with rapid MVP iteration.

What You'll Do

• Architect and Build: Design and implement the core payments system from scratch, including our custom workflow execution runtime.
• Drive Key Decisions: Take ownership of crucial decisions on architecture, technology stack, and tooling. Your voice will directly shape our technical future.
• Engineer for Scale: Build high-performance, low-latency distributed systems designed for massive concurrency and fault tolerance.
• Pioneer Secure Execution: Develop and refine our secure sandboxing mechanisms for running third-party code.
• Innovate and Iterate: Translate cutting-edge research and concepts into robust, production-ready software, moving quickly from prototype to product.

The Ideal Profile

While you don't need to tick every box, the ideal candidate brings a blend of the following:

• Experience with High-Performance Systems: A proven track record of building and operating distributed systems with demanding requirements for low latency (soft real-time), zero downtime, and massive concurrency.
• Knowledge of Secure Computing: Experience with, or a deep understanding of, the principles of sandboxing untrusted code. Direct experience with WebAssembly (Wasm) and its ecosystem (e.g., WASI, WIT, Wasmtime) is a major asset.
• Experience with Typed Programming Languages: You have experience with languages featuring strong static type systems and enjoy functional programming. We value Rust for high-performance systems and Haskell for compilers and static analysis, but above all, a passion for programming languages and type systems.
• Comfort with ambiguity: You thrive when faced with new challenges, can research unfamiliar areas, and turn insights into working software.
• Pragmatic mindset: A hands-on approach to shipping quickly, while still laying strong technical foundations for the future.
• Strong Ownership & Communication: The ability to thrive in a small, highly collaborative team environment and take ownership of your work from concept to production.

• Collaborative Workspace: Work from a historic building only two minutes from the Oerlikon station, with a park next door and great food/coffee options. Alternatively, great co-working spaces are available for employees in select locations.
• International Startup Culture: Work with a diverse team in a role with room to take ownership and growth opportunities as the company expands.
• Learn Continuously: Benefit from frequent academy sessions hosted by your peers on a variety of topics that help you both learn and grow.
• Social Events: Enjoy regular social events and bi-annual on-site company events in Zurich.
• Give Back to the Community: Enjoy five extra days beyond your annual holiday allowance to give back to society through volunteering or community work.
• Dog-Friendly Office: Bring your furry friends to the office!
• Flexible Tech Set-up: Choose your preferred hardware that best sets you up for success.
• Mobile Allowance: Receive an allowance to cover your mobile subscription costs.
• Ownership Opportunities: Participate in the company’s success through stock options.

Interested?

Then, simply send us a few lines about yourself, why you would like to join Rivero, and your CV and/or portfolio.

We will only consider applicants based in Europe. Please indicate whether you are applying for a fully remote or on-site position. While this role can be either, we prefer candidates who are available to work on-site with the team.