Software Engineer Payments

lemonwayjobcareers; Paris; Hybride; EUR 65 000 - 90 000; Plein temps

Avantages offerts par ce poste

Hybrid work model (2 remote days/week)

Swile meal vouchers

Alan health insurance

50% Navigo/Vélib reimbursement

Gymlib access

Syntec holiday bonus and RTT days

Résumé du poste

Lemonway in Paris is seeking a Software Engineer to join the Payments Tribe, working with Core Banking and Payments squads to enhance the card payment stack and cash management platform. You will own features end-to-end, collaborating with cross-functional teams, and applying modern .NET/C#, SQL Server, RabbitMQ, Docker and Kubernetes.

Fluency in French and good English are required in this international environment.

Qualifications

• Professional experience with modern .NET and C# services.
• Knowledge of SQL Server, RabbitMQ, Docker, and Kubernetes.
• Understanding of distributed systems and microservices, with DDD and Hexagonal Architecture.
• Fluent French and good English in an international environment.
• Nice to have: knowledge of payment processing in a regulated environment.

Responsabilités

• Deliver features balancing code quality and delivery time.
• Review code with best practices and architectural decisions in mind.
• Stay up to date with ecosystem trends and share insights to raise engineering standards.
• Take ownership of products from specification to production issues.
• Deep dive into the payment ecosystem to build robust solutions.
• Bridge technical implementation and business value for Lemonway’s success.
• Collaborate with software, QA, and infra engineers and with product managers.
• Work with office, remote, and nearshore colleagues; be solution-oriented.

Connaissances

.NET / C#

Distributed systems

Domain-Driven Design

Hexagonal Architecture

French language

English proficiency

C#

Outils

Microsoft SQL Server

RabbitMQ

Docker

Kubernetes

Description du poste

Lemonway is an authorised payment institution at the heart of Europe’s new digital economy.

We secure payments for crowdfunding platforms, the collaborative economy, marketplaces, and e-commerce businesses, with a strong commitment to fraud prevention and the protection of customer funds.

Regulated by the French Prudential Supervision and Resolution Authority (ACPR) and benefiting from the European passport in 29 countries, Lemonway is based in Paris and brings together 150 multicultural and committed Lemonheroes.

More than 400 marketplaces trust us with their payments. We manage 1.4 million user wallets and have raised €50 million from Breega, Speedinvest, and Toscafund.

Profitable for the past four years and growing by 25% in 2025, Lemonway aims to remain one of Europe’s leading payment providers through healthy and sustainable growth.

• Industry: FinTech and online payments

• Location: Paris, France, in the Sentier district, 2nd arrondissement

• Remote work: Up to two days per week, with flexibility

Your mission

We are looking for a Software Engineer to join the Payments Tribe, a critical part of our platform powering the payment experience across channels. You will report to the Engineering Manager of the Tribe and work closely with eight engineers across two squads: Core Banking and Payments.

You will drive the enhancement of our platform by specifying, implementing, testing, monitoring, and troubleshooting the services provided to our customers. You will work across payment APIs, payment processing, reconciliation, and core banking systems.

This role combines technical craftsmanship, teamwork, and a product mindset within a Tribe that is central to both current and future projects for Lemonway. You will actively contribute to delivering our next-generation card payment stack for acquiring and issuing, as well as our cash management platform.

Your responsibilities

Technical craftsmanship

• Deliver features that can evolve, finding the right balance between code quality and delivery time.

• Review code with the Tribe’s best practices and architectural decisions in mind.

• Cultivate a continuous learning mindset by staying up to date with the latest ecosystem trends, experimenting with new patterns, and actively sharing your technical insights to elevate the Tribe’s engineering standards.

Domain ownership

• Take ownership of the products we develop and contribute to all stages of the development cycle, from specification to resolving production issues affecting our clients.

• Deep dive into our complex payment ecosystem. Question assumptions, challenge the status quo, and leverage your domain knowledge to build robust solutions.

• Understand the “why” behind the “what”: bridge the gap between technical implementation and business value, ensuring that our payment flows directly contribute to Lemonway’s operational success and client satisfaction.

Teamwork

• Collaborate closely with software, QA, and infrastructure engineers to solve technical challenges, as well as with product managers to deliver new features.

• Collaborate effectively with colleagues working from the office, remotely, and from nearshore locations.

• Strike the right balance between investigating independently and asking teammates for help, while remaining solution-oriented in your approach.

Your qualifications

• You are curious about emerging engineering tools, including AI-assisted development, and use them thoughtfully to improve productivity, quality, and learning.

• You have professional experience developing services with modern .NET and C#, and working knowledge of Microsoft SQL Server, RabbitMQ, Docker, and Kubernetes.

• You understand distributed systems and microservice architectures, and have applied approaches such as Domain-Driven Design and Hexagonal Architecture.

• You are fluent in French and have a good command of English, which is a strong asset in our international environment.

• Nice to have: Knowledge of payment processing in a regulated environment.
  

What we offer

• Offices in the heart of the Sentier district in central Paris.

• A hybrid working model, with 2 remote work days / week + 3 weeks of full remote / year.

• Swile meal vouchers.

• Alan health insurance.

• 50% reimbursement of your Navigo or Vélib’ subscription.

• Access to Gymlib.

• Syntec holiday bonus and RTT days.

• A multicultural, collaborative, and international working environment.

Lemonway is committed to promoting diversity and inclusion, including gender equality and the employment of people with disabilities.