Senior Software Engineer, Payments

About the role

The Senior Software Engineer will join the Payments Tribe to architect, design, and enhance the platform powering payment experiences across all channels. This role involves working across payment APIs, processing, reconciliation, and core banking systems while collaborating with cross-functional teams to deliver scalable features. You will play a pivotal role in developing the next-generation card payment stack and cash management platform.

Responsibilities

• Design and deliver scalable, complex features with a focus on code quality and efficiency.
• Lead code and architecture reviews to shape best practices and architectural decisions.
• Drive continuous improvement by staying updated on trends and mentoring peers.
• Take ownership of the product development cycle from specification to production troubleshooting.
• Collaborate with software, QA, and infrastructure engineers to solve technical challenges.
• Translate complex architectural decisions into clear insights for stakeholders.

Required skills

• Domain-Driven Design
• Hexagonal architecture
• Event-Driven Architecture
• CQRS
• Relational databases
• Microservices
• .NET
• C#
• MS SQL
• RabbitMQ
• Docker
• Kubernetes
• CI/CD
• Terraform
• IaC

Nice to have

• AI tools
• Payments processing

Qualifications

• 5+ years of experience in software engineering building robust and scalable applications
• Fluent in French and comfortable working in English

Benefits

• Meal vouchers
• Complementary health care plan
• 50% transportation pass reimbursement
• Gymlib access

About the Company

Lemonway is a licensed payment institution securing payments for crowdfunding platforms, marketplaces, and online retailers. Regulated by the ACPR, the company manages 1.4 million user wallets and operates with a team of 150 people across Paris and Hamburg.