Senior Full-stack Engineer

Our Mission

Prose is truly custom hair and skin care made-to-order—just for you. Our line of custom products are made by an in-house, Paris-based R&D team of gifted chemists who combine natural ingredients in innovative ways alongside dermatologists, giving consumers clean skin care, hair care and impeccable results.

At the heart of Prose’s success is Singular, its proprietary AI-powered beauty-tech platform, which has revolutionized personalized beauty at scale. Marrying a technology-driven approach with an apothecary-style concept, all Prose hair and skin care products are personalized to your one-of-a-kind hair, skin, goals and environment.

We’re a company that wants to change beauty practices, so we’re changing the way beauty companies practice. As a certified B Corporation, a Public Benefit Corporation and Climate Neutral, we’re proving that good business is always sustainable. With Prose, there’s nothing sacrificed to bring you great products—not trees, materials, wages, or performance.

Prose & Singular in Numbers

• Founded in 2017, with hubs in Paris, New York, and Los Angeles

• 10M+ consultations completed

• 2M customers and 350K active subscribers

• 21M custom products made, with 1M+ unique formulas

• 350+ team members across disciplines

• $600M+ in lifetime sales, with $165M+ revenue in 2024

• Profitable since 2024

Discover our Company Culture on Welcome to the Jungle here

Discover our Company Mission & Vision in video here

Position Summary

Prose is seeking a Senior Full-stack Engineer to design, build, and ship the systems behind Singular, our proprietary platform. You'll be part of our Tech organization that designs, builds, and delivers both platform capabilities and product features that power Prose's personalized beauty experience — from the consultation and e-commerce journey to the manufacturing systems that turn every order into a physical, made-to-order product in our NYC and LA facilities.

We are a deliberately compact, senior engineering team. Every engineer owns a broad scope, ships to production continuously, and works with AI-augmented development practices as a core part of the craft. You'll join at a moment where we're evolving toward a modular architecture with clearly separated domains, and you'll have a real voice in those design decisions.

Few engineering teams get to ship code that ends as a physical product formulated for one specific person. If you're passionate about end-to-end ownership, technical excellence, and building with the best AI tooling available, we'd love to hear from you.

Key Responsibilities

• Build & Ship

  • Design, build, and ship features end to end across our stack: Python/Django services and REST APIs on the backend, React applications on the frontend.

  • Own quality on your scope: automated testing, peer review, observability, and production monitoring.

  • Identify and address areas of technical debt, implementing improvements to enhance system performance and maintainability.

• Architecture & Technical Direction

  • Contribute to our architecture evolution: domain boundaries, data schemas, event-driven patterns, and the tradeoffs of a platform serving both e-commerce and manufacturing.

  • Participate in architecture discussions and system design decisions.

  • Advance our AI implementation across the tech org: make AI-augmented development part of your daily practice, and help shape our agents, skills, and internal tooling rather than just consuming them.

• Collaboration & Impact

  • Collaborate closely with product, design, data, and operations stakeholders to deliver high-quality features — our scope touches everything from checkout conversion to factory throughput.

  • Bring visibility to ongoing work, risks, and dependencies.

  • Mentor other engineers and raise the team's bar through design and code review.

  • Contribute to technical documentation and knowledge sharing across the team.

Key Candidate Requirements

• 5+ years of professional software engineering experience, with significant time on both backend and frontend in production systems.

• Strong backend experience with Python, along with common libraries such as Django, Rest Framework, FastAPI.

• Solid modern frontend experience with React and the current JavaScript/TypeScript ecosystem.

• Deep understanding of fundamental design principles behind a scalable application.

• A knack for writing clean, readable, and maintainable code.

• Hands-on AI fluency and a genuine interest in AI-assisted engineering workflows.

• Comfortable with cloud-native environments: GCP, Docker, CI/CD.

• Pragmatic mindset, knowing when to invest in perfection, and when to build a PoC.

• Autonomous on your scope: you own outcomes, escalate when needed, and don't wait to be told what to do.

• Prior experience in B2C, e-commerce, manufacturing is a plus.

• Fluency in English is required.

Compensation & Benefits

Prose fosters inclusivity, learning, and diversity within our teams and workplace. Just as we celebrate unique beauty, every team member is encouraged to show up as their full self. In addition to creating an environment where all individuals feel welcome, we offer benefits that include:

💵 Compensation

• Competitive base salary — 60.000–70.000€ based on experience

• Variable bonus up to 10% based on company and individual performance

• BSPCE program

🩺 Health & Wellness

• 100% coverage of health insurance and life/disability plan (including dependents)

• Access to CSE allowance

🍽️ Lifestyle & Perks

• Standard French benefits: Swile meal vouchers, transport allowance, and Syntec vacation bonus

• €150 worth of personalized Prose products each month

Hiring Process

🕓 Timeline

From first contact to final decision: ~3 weeks

Recruiter Screen — (30–45 min, remote) A first conversation with our dedicated recruiter. He'll walk you through the role, Prose's context, and assess your background and motivations.

Engineering Interview — 1 hour (on-site) Meet an Engineering leader from the team. We'll walk you through the Tech vision, ongoing initiatives, and how the team works day to day — and dig into your experience and technical background.

Live Case — 1 hour 30 (on-site) A practical exercise conducted live with the team — no take-home assignment. We'll walk through a real-world design and coding challenge from our environment. We'll be looking at your methodology, your reasoning, and your ability to stay crisp under realistic conditions.

HR Interview — 1 hour (on-site) A conversation with Sabrina Gavois, VP People & Culture. We'll explore your mindset, values, and cultural fit with Prose.

CTO Interview — 45 min A final conversation with Nicolas Valençot, Chief Technology Officer, on system thinking, ownership, and long-term technical vision.

Prose Values

Intentional Inclusivity

• We know the best ideas come from open minds and willingness to listen. While our products cater to the individual, an invitation into our process is always open to our community.

• We value our differences and diverse backgrounds by communicating openly, managing with transparency and striving to understand one another’s perspective. It’s a key ingredient to our innovation.

Connected Collaboration

• Our strength as a group will outlast our efforts as individual contributors. With offices across countries, staying inventive and agile deepens our clear vision and consistent communication.

• We stay in a spirit of entrepreneurial collaboration: We do not have consensus at all times, but we trust one another to work toward our common goals. Our success is an expression and result of our progressive and gratifying teamwork.

Driven, Together

• We value ownership and coaching that encourages employees to think constructively and creatively about the business. We view employees as leaders and individuals who are accountable, resourceful and responsible. Anyone and everyone is encouraged to lead.

• We recognize that in order to continue thinking one step ahead, we will need to try new things. We strive to provide an open environment that accepts this truth, making space for new ideas to emerge.

Humanity Always

• We assume good intentions in every interaction, keeping ourselves accountable for the climate we create. We seek to understand our co-workers through this lens of conscious benevolence, authenticity and fellowship.

• We operate with the intention of preserving resources, creating an environment we can all live in – for our business and the world. Sustainable care is essential to our ethos as an organization. We take a mindful approach to how we think about our people (employees) and our planet.