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Sylvain LeraySL

Sylvain Leray

Senior Engineering Manager

€650/day
Nantes, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sylvain

🎯 Senior Engineering Manager with 22 years of experience (including 12 in management), I help companies structure their tech teams, improve quality, and accelerate their delivery.
I intervene when you need pragmatic leadership, a clear framework, and rapid results: skill development, efficient organization, bug reduction, better predictability, strengthened team culture.


What I bring you:
• Structuring and scaling teams (processes, rituals, quality, CI/CD, testing)
• Improving engineering performance (delivery, cycle time, stability)
• Coaching managers / tech leads (ICF ACC certified)
• Assistance with recruitment and onboarding support
• Strengthening collaboration and communication between teams


Types of assignments:
Interim / fractional Engineering Manager, engineering audit, implementation of high-performance delivery, individual coaching, team restructuring or professionalization.
My approach: pragmatic, human-centered, impact-oriented, with concrete results (e.g., back-end coverage 12% → 84%, production bugs -80%, team 10 → 21).
Available to discuss your needs.
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Nantes (up to 50km)

Experience

  • Flowie
    Senior Engineering Manager
    SOFTWARE PUBLISHING
    September 2024 - September 2025 (1 year)
    Paris, France
    Managed and grew a tech team from 10 to 21 people (full remote). Oversaw hiring, onboarding, mentoring and performance development. Implemented engineering best practices (DOD, DOR, WIP limits). Raised software quality standards: improved unit test coverage, strengthened CI/CD and QA strategy. Built a strong feedback culture within the team and the wider company. Improved company-wide communication and process alignment.
    Team Management Project Management Recruitment
  • ETX Majelan
    Senior Engineering Manager
    CULTURE
    February 2023 - August 2024 (1 year and 6 months)
    Paris, France
    Managed a team of 10 senior developers and freelancers (remote). Introduced strong delivery and quality processes (DoD, DoR, WIP limits). Transitioned the team from Scrum to Kanban to improve flow. Modernized a legacy codebase to industry standards (tests, CI/CD, QA). Increased Test coverage from 12% to 84% on backend Built and facilitated a strong feedback culture. Coached 15 internal employees as part ofcoaching certification (50+ hours).
    Team Management Kanban
  • CoachHub
    Engineering Manager
    EDUCATION AND E-LEARNING
    January 2021 - February 2023 (2 years and 1 month)
    Berlin, Germany
    Hired and built a cross-functional feature team across Europe. Led a high-performing team of9 (product, design, QA, developers). Established high-quality engineering standards (no-bug-in-backlog policy, strong e2e coverage). Reduced bugs in prod by 80% Created a safe and fun team environment with strong feedback routines. Led company-wide initiatives: annual reviews framework, code conventions, stakeholder networking program.
    Recruitment Team Management Scrum

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Education

  • Master Degree in computer science
    Ecole d'ingénieurs du Conservatoire National des Arts & Métiers
    2014
    Master Degree in computer science
  • BTS Marketing (Bac
    Notre Dame
    2000
    BTS Marketing (Bac

Skill set

Categories