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 cloud-based payroll and employee management 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 16,000 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 :
You can work in this position from any place in France or Spain

About the Role

You will join the Platform tribe as a Senior Engineer and will help scale PayFit’s practices in delivering an internal developer platform that contributes to product teams' efficiency.

PayFit is transitioning progressively towards a more decoupled architecture, embracing event-driven and following the principles of DDD as the most efficient way to continue to deliver and increase our value proposition iteratively. This also fits in our long-term architecture vision, and relies on a strong internal platform to enable product teams to deliver values in an efficient way.

We scale our observability and reliability capabilities to empower the organization to discover its system improvement opportunities and prioritize them holistically.

We strive to surface actionable KPIs and SLOs to healthily operate and evolve PayFit products for a variety of stakeholders, either technical, product, or business-oriented.

We provide tools, guidelines, knowledge, and policies to deliver and evolve sustainable products.

Key Responsibilities

You will take into consideration constraints of performance, scalability, and security to contribute to the evolution of PayFit’s SaaS architecture. The Senior Engineer role at PayFit involves:

• Delivering high-quality, production-ready code with a strong focus on performance, security, and scalability, while maintaining alignment with PayFit's best practices and standards.
• Writing detailed specifications and documentation for features, understanding their cross-squad impacts, and ensuring successful implementation.
• Foster collaboration and innovation across squads by engaging in open communication, providing constructive feedback, and challenging the status quo.
• Reducing technical debt across multiple squads by proactively proposing and contributing to sustainable solutions and improvements.
• Align with the Engineering Department’s long-term vision by leveraging deep knowledge of the organization, defining squad and tribe goals, and anticipating the impact of work on existing features and teams.
• Supporting and improving observability practices by guiding teams in implementing effective monitoring, logging, and alerting to enhance the reliability and maintainability of PayFit's systems.

Within the Platform tribe, and more specifically along the Infrastructure Developer Experience team that you would work closely with, this also goes along:

• Empowering platform users and driving platform evolutions based on feedback: work with multiple teams on platform-related topics – may it be teams using the platform, or the multiple teams delivering it
• Providing the right infrastructure building blocks: infrastructure tools and libraries that help product teams deploy services easily, efficiently, and most importantly, autonomously

Examples of topics that could be encompassed by this role as of early-2025:

- Design solution to improve our delivery pipelines, helping improve our current Continuous Delivery setup

- Migrate PayFit's workloads towards ARM, with everything that goes along may it be at the build chain level or runtime level

- Get away from legacy systems that are entangled in our whole stack towards better alternatives – ex: replacing our home-made job scheduler based on NSQ by direct usage of SQS and code-level logic

- Contribute to the last miles of our migration of our home-made reverse proxy in Golang by LBs / API Gateway managed by AWS which is ongoing and will unlock more improvements once over

- Work closely with the product teams in order to actively contribute the the vision of the building blocks our platform should provide, and help actually delivering them

Our tech stack

Technically speaking, here is the stack that you will be working with:

- Code: 95% TypeScript

- Back-end: mostly NestJS

- Front-end: React

- Build: nx

- Runtime: 80% Kubernetes (AWS EKS) / 20% AWS Lambda

- Continuous Integration: 90% CircleCI / 10% GitHub Actions

- Infrastructure-as-code: OpenTofu stacks applied through Spacelift for most of the infrastructure, AWS SAM for lambdas and the resources around them.

- Observability: Datadog

- Code hosting: GitHub

- Full-blown AWS-based architecture. No pursuit of a mythical “multi-cloud” agnosticism.

- Data storage: depending on actual needs, but so far mostly MongoDB (both self-hosted & through MongoDB Atlas), PostgreSQL through AWS RDS/Aurora, Redis through AWS ElastiCache, AWS OpenSearch, and AWS DynamoDB

- More and more messaging systems (AWS SQS / SNS / EventBridge) and usage of AWS Lambda & Step Functions, as per our ongoing transition toward a more event driven architecture

Of course, such a stack is deemed to evolve as time goes on.

As the above list most likely shows, we happily rely on third parties over trying to manage everything ourselves, preferring to spend time on specific close-to-product matters than on infrastructure & tools maintenance.

This Role is for You If:

- You are experienced in Cloud Architecture, preferably with AWS, Kubernetes and building platforms around them.

- You feel comfortable with TypeScript and its evolving ecosystem or interested to ramp up

- As a bonus, you are experienced in Systems Design, Event Driven Architecture and distributed systems patterns experience.

- You feel comfortable with TypeScript and its evolving ecosystem or interested to ramp up

- You speak English fluently and you want to work in an international and dynamic environment

- You strive to understand, synthesize, and communicate complex technical concepts and business problems

- You are a doer with a creative force and a high attention to detail: strive for the highest quality with an iterative approach mindset

- You are a real team player who wants to build a big success story with us

- You are receptive to feedback, to be mentored and to mentor others. We're caring and make sure everyone can grow. You will be empowered. You will empower others.

Interview process :

1. Initial Discovery Call: A Talent Acquisition representative will assess your qualifications and fit for the role – 30min
2. Interview with the Engineering Manager of the team you would join –
3. Technical Interview with team members – 90min
4. Interview with Engineering Director of the Platform Tribe to discuss your understanding of our role and challenges and your potential impact in it – 45min
5. Meeting the team

👉 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: A Gym at our Paris office and a 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!