Senior Software Engineer - Declarations

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 18,000 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 or Spain 


About the role:

Join our dynamic 5-person full stack development team at PayFit, where you'll be building declarations solutions that streamline interactions between our customers and government agencies across France, the UK, and Spain. We're on a mission to automate, scale, and enhance complex regulatory processes, making compliance seamless for businesses.

What you'll do:

- 🔧 Features development: Design and deliver new features that directly impact thousands of businesses navigating regulatory requirements

- 📐 Architecture excellence: Implement hexagonal architecture, CQRS, and Domain-Driven Design (DDD) tactical patterns to enhance code readability and maintainability

- 🎯 Technical leadership: Challenge product requirements, model solutions, and lead system design discussions

- 🏛️ Domain expertise: Dive deep into the declarations’ domain and translate complex regulatory requirements into clean, understandable code

- 👥 Collaboration: Conduct systematic code reviews and frequent pair programming sessions to maintain high code quality

Our tech stack:

- TypeScript/Node.js with NestJS framework

- Microservices architecture in a Nx monorepo

- Event-driven communication via an internal resource platform (built with AWS resources)

- Cloud architecture on AWS (Lambda functions, DynamoDB, S3, SQS, EKS, …)

- MongoDB for main domain data

- React on the frontend

- Vitest for testing, ESLint/Prettier for code quality

- Datadog for observability, CircleCI for CI/CD

- Docker containerization with AWS ECR

This role is for you if:
- You are an Engineer with 5+ years of experience and have an interest in learning Payroll and Declarations domains

- You have a strong proficiency with our tech stack (TypeScript, NestJS, AWS, MongoDB)

- You have an interesting hands-on experience with Domain-Driven design and Event-Driven Architecture, and have a strong understanding of hexagonal architecture.

- You are have a growth mindset with eagerness to learn and share knowledge

- You are comfortable with AI code assistants

- You are a Problem solver: You are a pragmatic and product-driven engineer who is interested in solving problems and delivering value while taking into account business <> tech tradeoffs.

- You are a Team player: You have good communication skills, are comfortable working in a partially remote team, and can easily work with non-technical colleagues.

- You are using Best Practices: You are an organized, rigorous engineer who follows best practices regarding code