Full Stack Engineer – B2B Payments Platform

About the role

We are looking for a Full Stack Engineer to join a mid-size team building a B2B accounts payable platform that processes payments through multiple modalities. You will work across the entire technology stack, from infrastructure as code to backend services, front-end interfaces and database migrations.

Key responsibilities

• Develop and maintain Terraform-based infrastructure for multi-environment deployments.
• Design, implement and evolve Java Spring Boot services, including MVC and reactive WebFlux/Mono/Flux APIs.
• Build responsive user interfaces using React.
• Create and manage database schemas and migrations in MySQL and PostgreSQL.
• Integrate messaging solutions such as RabbitMQ or AWS SQS/SNS for event-driven communication.
• Implement secure APIs with OAuth2, Spring Security and JWT.
• Write unit and integration tests using JUnit and Mockito.

Required profile

• Proven experience with Java and the Spring Boot framework (MVC and WebFlux).
• Strong knowledge of relational databases, schema design and migrations (MySQL, PostgreSQL).
• Hands-on experience with messaging systems (RabbitMQ, SQS/SNS) and asynchronous patterns.
• Working level familiarity with AWS services (Lambda, ECS, S3, RDS, SSM).
• Experience securing APIs with OAuth2, Spring Security, JWT and policy-based authorization.
• Solid testing discipline using JUnit, Mockito or similar tools.

Required skills

• Java
• Spring Boot (MVC, WebFlux, Reactor)
• MySQL
• PostgreSQL
• RabbitMQ
• AWS Lambda
• AWS ECS
• AWS S3
• AWS RDS
• AWS SSM
• OAuth2
• Spring Security
• JWT
• JUnit
• Mockito
• Terraform
• React