Staff Engineer - Paris, Full-Time
Jus Mundi is hiring a Staff Engineer to play a critical role in shaping and sustaining a resilient, secure, and scalable platform that acts as a force multiplier for our entire engineering organization.
About Jus Mundi
Founded in 2019, Jus Mundi is a mission-led company pioneering legal technology to power global justice through artificial intelligence. Headquartered in Paris, with offices in New York, London, and Singapore, we serve over 150,000 users globally. We combine legal expertise with cutting-edge AI to provide global legal intelligence, data-driven arbitration professional selection, and business development services.
What Makes Jus Mundi The Place To Be
- Our Values: Friendly, Committed, Explorative, and Excelsior foster collaboration, innovation, and growth.
- Legal Is the Next Frontier for GenAI: We are building transformative AI in the legal sector.
- Proven Product Market Fit: We have secured product-market fit in global markets, partnering with top-tier firms and corporations.
- Strategic Investment: Recently raised over $20 million in Series B funding.
- Legal Meets Tech: Engineers and former lawyers collaborate with LLMs to pioneer the future of generative AI.
- Exceptional Team: Work with talented professionals from industry leaders like Google and Amazon.
Job Description
Jus Mundi is looking for a Staff Engineer to be the technical guardian of our "Zero-friction delivery" North Star, ensuring business value is delivered at speed and securely through simple, standardized engineering practices. This role balances strategic technical leadership with hands-on engineering work, grounding technical decisions in product impact and business context.
This is a senior individual contributor role with broad influence, focused on driving impact through architecture, standards, mentorship, and product-oriented technical leadership.
The Team
You will work across multiple product and platform teams, collaborating with Engineering, Product, AI, and Security stakeholders to define shared foundations and enable teams to move faster and safer. Our engineering culture values high ownership, pragmatism, collaboration, and technical excellence.
Your Mission at Jus Mundi
Strategic Leadership & Architecture
- Drive architectural decisions and technical strategy across multiple teams, focusing on product outcomes.
- Design and evolve fault-tolerant, scalable distributed systems.
- Guide teams toward sound architectural decisions and coordinate cross-squad initiatives.
- Partner with Product and Engineering leaders to balance technical trade-offs with business value.
Hands-On Technical Work
- Undertake essential work such as stack upgrades (PHP, Symfony) and technical migrations.
- Write production code across different domains and context-switch rapidly.
- Lead resolution in crisis situations (e.g., critical infrastructure incidents).
- Lead by example in code quality, testing, security by design, and deployment best practices.
Platform Excellence & Engineering Framework
- Lead the implementation of our new engineering framework.
- Define and enforce engineering standards for reliability, security, testing, and deployment.
- Drive the transition toward fully automated, self-healing, and immutable infrastructure.
- Lead platform-wide initiatives to improve developer productivity, system reliability, and end-user experience.
Preferred Experience
Experience & Seniority
- 10+ years of professional experience in software engineering and cloud infrastructure management.
- At least 3 years in senior or staff-level technical leadership roles.
- Strong track record of leading complex technical projects without direct managerial authority.
Technical Stack & DevOps
- Senior software engineering experience with PHP and Symfony.
- Solid experience with Node.js (Nuxt experience is a plus).
- Strong DevOps expertise: Kubernetes, Infrastructure as Code, CICD, Observability.
- Experience designing, scaling, and operating fault-tolerant distributed systems.
- Ability to work across multiple programming languages and contexts.
System Design & Architecture
- Deep expertise in system design and distributed systems architecture.
- Proven ability to make and communicate clear technical trade-offs.
- Experience orchestrating complex technical transitions across multiple teams.
Leadership & Communication
- Crisis management experience and composure under pressure.
- Strong opinions with the ability to advocate for positions while driving consensus.
- Excellent capacity to convince, guide, and drive technical decisions.
- Outstanding written and verbal communication skills in English.
- Strong product mindset with the ability to understand business context and user needs.
- Ability to evolve in a fast-changing environment, reevaluating priorities and choosing the right impact under multi-level requirements.
Bonus: Experience in SaaS or AI-powered platforms, security engineering, large-scale platform engineering, or legal tech environments is a plus.
Recruitment Process
We are proud of our multicultural team representing 37 nationalities. To ensure smooth communication, please apply in English (CV + Application Form).
- Introductory Video Call with Laurine, Talent Manager (30 min)
- System Design Interview with Yohan, Head of Infrastructure, and Dash, Head of AI (1h30)
- Deep Dive Coding Challenge with John, Tech Lead Manager, and one Software Engineer (1h30-2h)
- Product & Technical Mindset interview with Matthieu, Tech Lead Manager, and one Product Manager (45 min)
- Half-Day of immersion at the Office + Lunch or Afterwork (3h)
- Last call with Jean-Rémi, CEO, or Anna, VP of People (30 min)
Please note that, due to the nature of the sector we operate in, the final steps of our recruitment process include reference calls and a background check.
Need More Reasons to Join Us?
- Hybrid Working: Enjoy a hybrid working organization combining remote and on-site work (2 days).
- Vacation: Get 5 weeks of vacation each year.
- Health Insurance: 100% coverage of private health insurance for yourself and your children.
- Restaurant Vouchers: 60% company-funded restaurant vouchers (Swile).
- Company Summits: Participate in company-wide summits called JM Fest.
- Fitness: Co-financed ClassPass membership.
- Work from Anywhere: Flexibility to work from anywhere globally for up to 8 weeks per year.
- Relocation Assistance: Assistance to help ease your transition to France.
- Inclusive Environment: Experience a commitment to building a warm, inclusive, and diverse environment.
At Jus Mundi, we believe that diversity, equity, and inclusion are key to our success. We encourage you to apply regardless of how you identify. Your unique perspective and skills are what matter most. Join us in building a workplace where everyone feels valued, empowered, and excited to contribute their best work every day.
Additional Information
- Contract Type: Full-Time
- Location: Paris
- Experience: > 10 years
- Possible partial remote
Apply Now
Meta Description: Staff Engineer (H/F) à Paris : Rejoignez Jus Mundi, leader de la legal tech, et participez à la révolution de l'IA dans le droit. Postulez dès maintenant ! (148 caractères)
