Senior Fullstack Developer

Sunstice , formerly known as FuturMaster, is a global software partner in Supply Chain Planning (SCP) and Revenue Growth Management (RGM). We’ve helped organizations plan, decide, and perform in complex, volatile markets for over 30 years. Powered by Structured Agility™, our platform blends clear governance with rapid adaptation so teams can anticipate change, absorb disruptions, and make value-led trade-offs across Demand Planning, Supply Planning, Integrated Business Planning (IBP), and RGM.

Headquartered in Paris with hubs in the UK, China, Singapore, Brazil, and the USA, our 248 colleagues support 650+ customers in 90 countries, including Heineken, L’Oréal, SNCF, Sennheiser, and TotalEnergies. Join us to build clarity in motion and grow your impact.

We’re growing fast and evolving our solution at a technological turning point: modernizing our data models and tackling large-scale supply chain challenges.

To strengthen our R&D capabilities, we are looking for a Senior Fullstack Developer to join one of our agile squads in Boulogne-Billancourt.

About the Role
This position involves approximately 70% frontend and 30% backend development . You will contribute significantly to evolving our user interface and experience while supporting backend functionality.

What You Will Do
As a senior developer, you will:

• Work across the full stack—backend and frontend —to build scalable, performant solutions.

• Take part in all stages of software development: functional and technical analysis, estimates, coding, automated testing, peer reviews, demos, and retrospectives.

• Tackle both business and technical challenges:

  • Complex configuration and data visualization for supply chain users

  • High-volume data processing and performance optimization

  • Frontend modernization

• Collaborate closely with developers, QAs, product managers, designers, architects, and international colleagues in China.

• Help shape technical direction and propose pragmatic solutions to architectural and business problems.

Our Stack

• Frontend : TypeScript, JavaScript

• Backend : Java, Spring Boot, Microservices

• Cloud : Azure

• Databases : SQL server

• Deployment : Container-based environments

What We Offer

• Hybrid work : 2 remote days per week

• A caring, growth-focused culture: Mistakes are part of learning; collaboration and support are our foundations

• Autonomy with impact: You’ll own your code, your quality, and your results

Who We are Looking For

• Experienced : A minimum of 5 years as a software developer, with strong backend expertise and solid front-end fundamentals

• Tech-savvy : You write clean, testable code and have experience with microservices and cloud-based deployment

• Frontend-focused : Strong knowledge of TypeScript frameworks and JavaScript

• Critical thinker : You don’t just build what’s asked; you challenge assumptions and propose better ways

• Collaborative : You enjoy teamwork, sharing knowledge, and giving/receiving feedback

• Communicative : Comfortable working in English within a distributed, multicultural team

• Educated : Degree in engineering, computer science, or applied mathematics

Join us to help build the future of our platform—and take part in a key moment of transformation.

We are committed to fostering an inclusive workplace. All our positions are open to candidates with disabilities and can be adapted to meet individual accessibility needs.