Senior Software Engineer

Ageras; Paris; Sur place; EUR 60 000 - 80 000; Plein temps

Résumé du poste

A leading fintech company in Paris seeks a Senior Software Engineer to enhance their invoicing solutions. The role involves leading technical discussions, mentoring developers, and ensuring high code quality. Join a motivated team and make a real impact in a fast-paced environment.

Prestations

Hands-on experience in an international, fast-growing fintech

Fun and social office environment

Snacks and lunch provided

Qualifications

• 5+ years of experience in a modern fullstack environment.
• Solid understanding of mobile app development process.

Responsabilités

• Lead technical discussions and decisions as the technical lead.
• Take ownership of projects from concept to deployment.
• Drive delivery of features with fast, iterative development.

Connaissances

React

React Native

TypeScript

Node.js

Cloud infrastructures

CI

System design

Communication

Problem-solving

Description du poste

At Ageras, we are redefining how entrepreneurs—freelancers, self-employed professionals, and SMEs—manage their banking, and administrative tasks. Through seamless tools and innovative accounting & banking solutions, we help them focus on what matters most : growing their businesses.

Our vision is to become the best friend of every small entrepreneur across Europe.

Over the years, Ageras has grown through the merging of top European FinTechs like Shine (), Kontist (), Tellow (), and more. Today, we’re a team of nearly 500 people, including 150 talented engineers, working together from Paris, Amsterdam, Copenhagen, and Berlin.

What does success look like in this role?

Our Invoicing Success team is on a mission to deliver seamless, intuitive invoicing experiences that empower small entrepreneurs to manage their finances efficiently. The team is tight-knit, experienced, and supportive—with members in Paris, Lyon, and remote locations, working collaboratively in a high-autonomy environment.

We’re looking for a Senior Software Engineer to join our growing team and bring fresh perspectives, leadership, and motivation. If you're passionate about building products that matter, leading by example, and working across the full stack—from infrastructure to interface—this role is for you.

Your role as a Senior Software Engineer

As a Senior hire, you’ll play a key role in shaping how we work, bringing a high level of technical expertise, product thinking, and team mentorship.

Your responsibilities will include :

• Lead technical discussions and decisions as the technical lead
• Review pull requests, mentor developers, and help maintain a high standard of code quality
• Drive delivery of features in our scope with fast, iterative development
• Assist other developers, sharing your expertise and supporting their growth
• Take ownership of projects from concept to deployment—communicating proactively with leadership and adjusting plans when needed
• Influence and improve our development practices, tools, and workflows

About you

Must-have skills :

• 5+ years of experience in a modern fullstack environment
• Strong expertise in :

React, React Native, TypeScript

• Node.js
• Cloud infrastructures (AWS, GCP, or equivalent)
• The Node ecosystem, including dev tooling (linters, tests, AI copilots), CI / CD, and release pipelines
• Solid understanding of the mobile app development process from development to release
• Fullstack mindset : front-end, back-end, web, mobile you’re comfortable across the board
• Experience with CI, system design, and organising codebases for scale
• Clear communicator with empathy. You listen, give feedback, and commit to collective success
• Strong sense of ownership, initiative, and user-centric thinking
• Comfortable in fast-paced, evolving environments

Soft skills that make you shine :

• Excellent communication and a strong sense of ownership
• Proactive mindset—you don’t just execute, you propose and lead
• Focused on product impact and user experience
• Comfortable in fast-paced, evolving environments
• Team player with a problem-solving attitude

If you’re the right person, here’s what success looks like :

• 3 Months : Fully onboarded into our codebase, familiar with our tech stack and roadmap. At this stage, you’ll be delivering meaningful contributions and taking ownership of mobile-related initiatives.
• 6 Months : Led the successful delivery of significant features, co-owning the tech alongside the team. By this point, you’ll have a solid grasp of our domain’s knowledge and will be a key player in shaping future projects.

What We Offer

Hands-on experience in an international, fast-growing fintech

A young, motivated team in the structuring phase – you’ll make a real impact!

A fun and social office environment in the heart of Paris (snacks, lunch, and great colleagues included!)

Start Date : Preferably Asap but flexible

Our recruitment process

Initial screening with our recruitment spetialist.

Personal chemistry check and online tech experience evaluation to validate your expertise.

Personality assessment and soft skills interview to see how we can best support your growth at Ageras.

Senior Software Engineer • Paris, Île-de-France, FR