Senior .NET Engineer

Project overview

Context

Objective: strengthen the team with a senior contractor capable of delivering complex features autonomously, within a "you build it, you run it" logic.

Stakeholders: Core Engineering Manager / Staff Engineer, Product Managers, UX/UI designers, engineering teams of the Client, Merchant, and User tribes.

Missions

Hands-on engineering

Technical quality and engineering practices

Cross-functional collaboration

Expected deliverables

Working conditions

• Design, deliver, and run in production .NET microservices and shared NuGet SDK packages for the team, as an autonomous contributor.
• Contribute to the improvement of the team's working methods, tooling, and best practices.
• Design, develop, test, and maintain .NET microservices and shared NuGet SDK packages, consumed by all tribes.
• Contribute to the technical design of new features and refactorings. Propose and defend domain breakdowns in design reviews.
• Apply and extend the team's architecture patterns: Clean Architecture, DDD, CQRS/MediatR, event-driven patterns, Outbox pattern.
• Address performance, scalability, and security challenges of a multi-tenant platform.
• Contribute to code quality, performance, security, and observability of the team's services.
• Take ownership of the run: service health, incident management, blameless postmortems.
• Follow and improve engineering practices: CI/CD on Azure DevOps, automated tests, code reviews, ADRs, documentation, pair programming.
• Work with the Engineering Manager or Staff Engineer on planning, risk management, and delivery trade-offs.
• Work with Product Managers and UX/UI designers to build realistic, high-value solutions.
• Represent the team's technical perspective in discussions at the tribe and platform level.
• Production code (microservices, shared NuGet SDK packages) delivered via reviewed pull requests, with automated tests.
• Technical documentation and ADRs for design decisions made.
• Contribution to the run of the team's services (incident management, postmortems).
• Client: [leading company in digital services and payments]
• RFP Date: 10/13/2026
• Location: site in Issy-les-Moulineaux, minimum 2 days on site per week. Occasional travel (approx. 1 time every 3 months).
• Start date / duration: to be confirmed

Project details

• Start: flexible
• Remote: hybrid
• Location: Paris, France, FR
• Languages: French