C# Developer
Confirmed on the employer's own hiring board on Oct 12, 2026. First seen by Alion on Oct 12, 2026.
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.