C# / .NET Developer - Digital Company Building at m+p

About Us

mühlemann+popp (m+p) is a digital company builder based in Zurich. Since 2010, we have been launching and scaling industry-leading web and mobile-based companies—including names like sobrado.ch, bontique.ch, evenito.com, and realmatch360.ch.

Our team of ~50 operates out of Zurich and Warsaw. We don’t just build software; we build businesses. We prioritize pragmatic engineering, clean architecture, and a strong sense of product ownership.

The Role: Leading the PeakJet Evolution

We are looking for a C# Developer to take a lead role in the modernization of PeakJet, a premium booking and flight management platform for business jets (an m+p venture backed by airline industry veterans).

Your mission is to handle the architectural evolution of the platform, migrating it from a legacy Virto Commerce v2 setup to a modern v3 (.NET 8) ecosystem. This isn't just a maintenance gig; it's a refactoring of complex logic for seat booking and auxiliary services in the high-stakes world of private aviation.

Ideal Candidate Profile (IMPORTANT for Overall Fit)

• Polyglot Mindset: Deeply skilled in C# AND at least one other backend language (Python, Node.js, Go, etc.).

• Experienced: 5+ years of professional software development experience.

• AI-Native: Expert at using AI coding tools (Cursor, Copilot, etc.) to accelerate delivery.

• High Energy & Passionate: Has uncommon hobbies, is a public speaker, or volunteers—we value people with a "spark."

Ideal Candidate Profile (Project Specifics)

• Company Builder Mentality: You care about the "why" behind the code and how it drives the business forward.

• Migration Specialist: You enjoy the challenge of moving legacy enterprise systems into modern, modular frameworks.

• Clean Architecture: You are passionate about decoupled backend services and SOLID principles.

Your Responsibilities

• Architectural Migration: Lead the technical transition of the PeakJet backend to the modern Virto Commerce v3 framework.

• Core Module Refactoring: Rebuild and optimize custom flight-related modules, specifically for Seat Booking and Auxiliary Services.

• Engineering Excellence: Maintain and extend modular architectures, ensuring high performance and scalability.

• Stakeholder Collaboration: Work closely with our CTO (Silvan) and external airline executives to translate business requirements into technical solutions.

• AI Productivity: Leverage AI tools to maintain high code quality and streamline development workflows.

Requirements - Hard Skills

• C# Mastery: Strong portfolio of .NET projects, specifically with .NET Core / modern .NET versions.

• Virto Commerce: Direct experience with Virto Commerce (v2 or v3) is a major plus.

• Web API & Backend: Expertise in ASP.NET Core and building robust, scalable APIs.

• Data & Migrations: Solid experience with relational databases (SQL Server, PostgreSQL) and complex data migrations.

• DevOps: Proficiency with Git workflows and containerization using Docker.

• Pragmatic Mindset: Ability to balance "perfect code" with the need to ship and scale a business.

• Location: Hybrid role based in Warsaw.
• Contract: B2B or Business Incubator - guaranteed load with 30 days notice period.
• Rate: €25-€40/h (approx. €6,000/month gross), depending on skill level.
• Perks:
• $77/month Medical & Sport budget.
• $100 Birthday bonus.
• $1,000 Loyalty bonus (after 3 years).
• Annual Summer Camp (European cities/beach locations).
• Growth: 3 dedicated education days/year + budget for courses and conferences.
• Warsaw Hub: Monthly team lunches, spring events, and year-end dinners.

• Because we use AI tools not just to build products—but to evolve how we work.
• Because we value output and impact over Jira tickets.
• Because we are small enough to move fast, but established enough to build things that last.