Senior Backend Software Engineer (Java/Kotlin)
Key Highlights
Salary up to €65,000
Hybrid working – 3 days onsite in Madrid
Work with Java, Kotlin, Cloud Technologies and Distributed Systems
Join a high-performing engineering team building scalable, cloud-native applications
About the Client
Due to continued growth, we’re looking for a Senior Backend Software Engineer to join an innovative technology organisation at the forefront of software development. Working as part of a collaborative Agile team, you’ll help build and enhance large-scale backend services that power business-critical applications used by customers around the world.
This is an excellent opportunity for an experienced backend engineer looking to work with modern technologies, influence technical decisions and contribute to the development of reliable, scalable software.
The Benefits
Salary up to €65,000
Hybrid working – 3 days onsite in Madrid
Adaptable working environment
Modern cloud-native technology stack
Work alongside highly experienced engineers
Ongoing learning and career development
Opportunity to contribute to the design and evolution of enterprise-scale systems
The Senior Backend Software Engineer Role
As a Senior Backend Software Engineer, you’ll play a key role in designing, developing and maintaining scalable backend applications and services. Working primarily with Java and Kotlin, you’ll build clean,



maintainable code, develop APIs, design integrations between distributed systems and help deliver high-quality software into production.
You’ll collaborate closely with engineers, Product Managers and stakeholders, contributing to technical discussions, improving development practices and ensuring solutions are secure, reliable and built to scale. This is a hands‑on role where you’ll have the opportunity to influence architecture, mentor others, and help shape the future of the platform.
Senior Backend Software Engineer – Essential Skills
Commercial experience with Java, Kotlin or another JVM language
Experience developing and supporting production software
Strong understanding of software engineering principles, design patterns and clean code
Experience building scalable APIs and distributed systems
SQL and/or NoSQL databases
Public or hybrid cloud experience
Git and modern version control practices
Debugging, testing and monitoring applications
Experience working within Agile development teams
Strong communication and problem‑solving skills
Desirable Skills
Microservices architecture
CI/CD pipelines
Cloud‑native application development
Monitoring and observability tools
Event‑driven architectures
Experience mentoring or supporting junior engineers
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📌 Senior Backend Software Engineer (Java/Kotlin) – Madrid
🏢 Searchability
📍 Madrid