Senior Software Engineer - Permission & Identity Team H/F PayFit

Get to know us

Do you want to help us shape what the future of work will look like and how it will best embrace our life's aspirations? If this sounds like a journey you want to embark on, we may have the right role for you! PayFit is an intuitive software as a service payroll and HRIS solution designed specifically for SMBs.Since 2015, we have set ourselves a mission to simplify payroll for SMBs and enable employers and employees to grow together. We are a European company operating from 3 main countries (France, Spain, and the UK) where we are supporting over 20,000 clients.

Creating a fulfilling work environment and culture is also a core mission at PayFit, and our day-to-day work philosophy is reflected in our four values:

Care:We genuinely care for others whoever they are, whatever they think.

Excellence:We aim to improve and achieve better results every day.

Humility:Staying humble and exchanging transparent feedback helps us to grow and improve.

Passion:We are the architects of PayFit's success.

A key part of our culture, and essential for our success, is also improving the diversity of our teams and building an inclusive culture where you can be yourself at work.

This is why our recruitment focuses on the skills you demonstrate, and not only on your academic background or previous professional experiences. At PayFit we understand that you can gain applicable skills through a variety of life experiences and we are interested in knowing them, too.

Location :
The position is based in France .

Position Overview :

Own and evolve our permissions and identity platform-raising reliability, performance, and developer ergonomics so every PayFit domain team ships secure, simple experiences. Permissions and identity sit at the heart of trust: as PayFit deepens product quality and moves toward disciplined, productled execution, we're modernizing our authorization and identity foundations. Expectations on security and privacy are rising; product squads need simple, reliable building blocks to deliver value without friction.

Impact - next 12 months :

-Roll out a clear, scalable authorization model and developerfriendly APIs/SDKs that teams adopt quickly

-Reduce authrelated incidents and alert noise; meet SLOs for reliability and latency with measurable gains

- Strengthen observability and documentation (decision logs/policies) to shorten MTTR

What will you do :

- Design and evolve permissions/identity services with clear contracts, isolation, and failure handling
- Provide productready building blocks (APIs/SDKs/policies), examples, and guides for easy adoption
- Instrument meaningful metrics/traces; reduce alert noise; improve detection and response
- Collaborate with Product/Design/Compliance/CS to deliver secure, simple user experiences
- Mentor peers and elevate engineering craft through reviews, pairing, and knowledge sharing

This Role is For You If / must-have skills:

- You have 7+ years as a Software Engineer (backend/platform), ideally with secure, multitenant systems, knowing Typescript
- You have strong system design and backend engineering experience in SaaS platforms
- You focus on code quality, testing, and maintainability
- You are skilled in observability (signals, alerts, SLOs) and incident response
- You communicate effectively with cross-functional teams and focus on customer outcomes
- You have a proven record of improving reliability, performance, and shipping safe changes at scale
- You create clear documentation and mentor others
- You manage multiple projects and dependencies
- You are fluent in English (Spanish or French is a plus)

It would be great if you also have / nice to have skills:

- Knowledge in authentication/authorization (e.g., RBAC/ReBAC/ABAC)
- Experience with EventDriven Architecture and DomainDriven Design
- Experience with policyascode or advanced authorization models
- Contributions to public knowledge sharing (talks, posts, OSS)

Interview process :

1.Discovery Call: Meet a Talent Acquisition Specialist (30-45 min).

2.Discussion with an Engineering manager: Meet Maxime, team's EM, to discuss technical aspects of your experience (45 min)

3.Technical Challenge & Code Review: Technical challenge with 2 team members (1 hour)

4.Product Discussion: Discussion with Product Manager (45 min)

5. Director Discussion: Final discussion with the Engineering Director of the tribe (30 min).

Background Check (ISO27001 certification): identity, diploma, and past professional experiences will be checked after the offer.

What we offer

Flexibility: We believe it is key to produce your best work and to be fulfilled. We therefore offer the possibility to work away from our main offices, within France/UK/Spain; as well as abroad for a defined period. Further requirements may apply depending on the role and your overall experience.
Learning & Development: In PayFit we have a great learning platform where you can learn new skills every day with the support of our company. We also have English language courses to improve your business communication vocabulary and get to the next level.
Career Development: We want you to progress and be free to choose which direction you want to grow. There are also opportunities for internal moves.
Health promotion: GymLib subscription with preferential rates. 4 paid sessions with a mental health practitioner and online support with Moka.Care.
Health insurance: Mutuelle Henner (60% covered by PayFit).
Transportation: 50% covered for your public transportation card for those living within Ile de France. A budget to travel to the office for those who live outside of it.
Meals: A restaurant card with our partner Swile ( 9€ per workday).
Home office budget: 150€ per year to help you get set up in the best conditions. A MacBook is our standard working tool.
Parental support: 20 weeks maternity leave covered by PayFit and 4 weeks leave for the second parent.
Time off: 25 days of holidays + RTT days (depending on the contract).

Disability Inclusion: All of our positions are open to any person living with a disability. To guarantee equal treatment and opportunities, we will take, based on individual needs, appropriate measures to adapt the work conditions of PayFiters with disabilities, and if needed also during the recruitment process. Please let us know what you need and we will do our best to accommodate!