Software Engineer (Java) at lynxtech

Setup: Hybrid
Location: Madrid, Community of Madrid
Posted: Jul 6, 2026

Description

Lynx Financial Crime Tech S.A. is seeking a Software Engineer (Java) to build and maintain a fraud orchestration platform. The role involves designing and developing backend microservices using Java 21+, Spring Boot, WebFlux, and Netty, integrating with various systems like REST APIs, OAuth, and cloud technologies. This position contributes to a safer and more transparent financial system.

Required Skills

Java
Spring Boot
WebFlux
Netty
REST APIs
OAuth
S3
SQS
SFTP
Kafka
MQ
JSON
Docker
Kubernetes
Git repositories
GitLab
GitHub
Bitbucket

Additional Information

Required Previous Experiences: +2 years developing backend applications with Spring Boot
Preferred Qualifications: Computer Engineering, software engineering, or related degrees
Fluent English level, at least B2
Proven knowledge and good practices in programming with Java and Spring Boot in recent versions.
Design and development of REST APIs.
Microservices architecture and backend design patterns.
Concurrent, asynchronous, and distributed programming.
Designing modular, extensible, high-performance systems.
Knowledge of Docker, Kubernetes, and cloud deployments.
Good testing practices: unit, integration, and performance testing.
Observability: logs, metrics, traces, alerts, and incident diagnostics.
Use of Git repositories, such as GitLab, GitHub, or Bitbucket, and familiarity with branch-based workflows, merge requests, or pull requests.
Knowledge of cloud environments is a plus.
Valuable experience working with CI/CD tools and containerized environments.
Code quality mindset: we're looking for people who value simplicity, maintainability, and good engineering practices.

About lynxtech

lynxtech

financial crime prevention

AI fraud detection for financial institutions with real-time monitoring, explainable scoring and operational workflows to stop fraud faster with Lynx.