Tech Lead C# - MS Dynamics (H/F)

Sonepar; Paris; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Health insurance

Transport pass reimbursement

Swile Ticket restaurant card

Gym access

Sustainable mobility package

Employee Savings Plan & Profit Sharing

Job summary

Sonepar, a world leader in electrical equipment distribution, is seeking a Tech Lead to guide the Spark platform engineering. You will drive architectural design, mentor engineers, and collaborate with product and architecture teams to deliver scalable software solutions.

The role requires strong C# / .NET expertise, experience with microservices, and a passion for high-quality, maintainable code in a hybrid Paris-based environment.

Qualifications

• 7+ years of software engineering experience with microservices and distributed systems.
• Strong proficiency in C# and .NET; experience with GraphQL, SQL and NoSQL databases.
• Experience with Domain Driven Design, Event Storming, and API design.

Responsibilities

• Implement architectural design and ensure scalability and performance.
• Own the full software development lifecycle from coding to deployment.
• Mentor junior engineers and promote best practices.
• Collaborate with product, architects, designers, and cross-functional teams.
• Conduct code reviews to maintain quality and standards.
• Address complex technical challenges and deliver timely solutions.
• Create and maintain system architecture diagrams and API docs.
• Identify performance bottlenecks and optimize applications.

Skills

Software engineering

Microservices

Distributed systems

C# / .NET

Agile methodologies

Problem solving

Education

Tools

Microsoft Dynamics

GraphQL

SQL

NoSQL

API Design

Job description

Who are we?

Sonepar is an independent family-owned group and a world leader in the distribution of electrical equipment, solutions and related services to the trade . In 2025, Sonepar generated a turnover of €33.6 billion. With a presence in 40 countries and an extensive network of retail outlets, the Group is undertaking an ambitious transformation to make life easier for its customers by offering them an omnichannel experience and a range of sustainable solutions for the industrial, construction and energy sectors. Our 46,000 employees are committed to the electrification of the world and united by a shared Purpose: “Power Progress for Future Generations.”

How will you shape our tomorrow

We are seeking a highly skilled and experienced Tech Lead to join our engineering team and work on Spark, a modular & omnichannel digital platform that brings together several business applications used by Sonepar teams and customers. Spark aims to simplify day-to-day operations, improve the user experience, and support more efficient digital processes across the organization.

As a Tech Lead, you will be responsible for leading the technical design, development and continuous improvement of the different business and technical domains of the Spark platform, serving the various applications. You will work closely with product, architecture and engineering teams, guide developers on technical choices and best practices, and ensure the delivery of scalable, reliable and maintainable software solutions.

Key responsibilities

• Implement the architectural design and technical specifications for software projects, ensuring scalability, maintainability, and performance
• Take ownership of the full software development lifecycle, from coding and testing to deployment and maintenance.
• Mentor and guide junior engineers, fostering a collaborative and innovative engineering culture within the team.
• Collaborate closely with product managers, lead architects, designers, and other cross‑functional teams to translate business requirements into technical solutions.
• Conduct thorough code reviews to maintain code quality, consistency, and adherence to coding standards.
• Tackle complex technical challenges and provide creative solutions to meet project goals and deadlines.
• Create and maintain technical documentation, including system architecture diagrams, API documentation, and coding guidelines.
• Identify and address performance bottlenecks, ensuring that software applications meet or exceed performance expectations.
• Stay up‑to‑date with industry trends and emerging technologies, and apply this knowledge to improve our software development processes.
• Foster a collaborative and inclusive work environment, promoting knowledge sharing and continuous learning among team members.

The experience you bring

• Proven experience (7+ years) as a Software Engineer, with a track record of delivering complex software projects in patterns like Microservices and Distributed Systems.
• Strong proficiency in C# .net
• Strong experience with Microsoft Dynamics
• Extensive experience with software design principles (Domain Driven Design, Event‑Storming), architectural patterns (Event Driven Architecture, orchestration, API Design), and other best practices.
• Solid understanding of database design, GraphQL, SQL, and NoSQL databases.
• Familiarity with Agile software development methodologies (e.g. Scrum, SAFE).
• Excellent problem‑solving and debugging skills.

Work Mode & Location

• Hybrid: 3 days in Paris (8ème) after the trial period

Benefits that await you:

• The role - Your daily activities will be interesting, stimulating and varied... No two days are alike!
• The organisation - You'll be part of the Sonepar family and share the same values!
• The culture - You'll be working in an international environment.
• The team - Our dynamic, multidisciplinary, open‑minded and talented team is eager to welcome additional skills to continue to meet the challenge.
• 75% reimbursement of your monthly or annual transport pass.
• Swile Ticket restaurant card
• Gym exclusively reserved for the company and made available to employees free of charge.
• Sustainable mobility package
• Health insurance & Welfare
• Employee Savings Plan & Profit Sharing Bonus.

Recruitment process

• Pre‑screening interview
• Technical Interview with one of our Lead Architect
• Manager Interview
• HR Interview
• SVP Interview

We encourage you to apply even if your experience doesn't align perfectly with the job description. Don't hold back because you feel you don't tick every box. At Sonepar, we value your skills, your passion and if your career journey has had remarkable twists and turns, it only adds to your unique story. We ensure we create an inclusive environment where everyone feels welcomed and valued for their uniqueness. Regardless of physical abilities, office requirements, gender, sexual orientation, academic backgrounds or other diversity dimensions, every position at Sonepar is open to individuals who share our core values and engagements. We aim to ensure our job listings resonate with everyone and truly represent the diversity we embrace and we are proud to have the GEEIS Label (Gender Equality for European & International Standard) and to be partner of AGEFIPH (Association de Gestion du Fonds pour l’Insertion Professionnelle des Personnes Handicapées)

You are interested in this challenge? Then join and build a better future with us!

More information on Sonepar:

Website : www.sonepar.com

Twitter: @sonepar

LinkedIn: https://www.linkedin.com/company/sonepar/