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# Software Engineer Iii

- **Company:** Sinch
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Code Review, Cursor (Graphical User Interface Elements), Distributed Systems, Software Engineering, Data Processing, Backend, Event Driven Architecture, Apache Kafka, Non-relational Database, Front End Software Development, Restful APIs, Microservices
- **Published:** August 8, 2026
- **Apply:** https://www.buscojobs.com.es/software-engineer-iii-en-madrid-ID-365855663

## About the Role

Your work powers messaging and engagement features across multiple product lines, with a focus on scalability, observability, and security.
This is a hands-on opportunity to shape the backend that enables world-class omnichannel communications at scale.Compensaciones / Beneficios - Develop and maintain scalable, distributed backend services and microservices using Java - Design, implement, and optimize APIs, messaging pipelines, and data models - Work with non-relational databases and ensure efficient data handling - Contribute to high-throughput messaging systems' performance and reliability - Participate in code reviews and technical discussions to drive quality and best practices - Collaborate with frontend, product, and other stakeholders to deliver aligned features - Ensure scalability, security, and observability of services across the lifecycle - Own tasks and deliver high-quality, maintainable codeResponsabilidades - 3-5 years of backend development experience with strong proficiency in Java - Solid understanding of microservices architecture and distributed systems - Experience with non-relational
databases - Familiarity with event-driven architectures and Kafka - Experience designing and developing RESTful APIs - Commitment to clean, maintainable, and testable code - Experience with AI coding tools (Copilot, Claude Code, Cursor, or similar) and awareness of their benefits/risks - Strong communication skills in English and ability to work autonomously in a fast-paced teamRequisitos principales -

## Description

Experteer Overview In this role you will build and scale the Inbox services for Sinch's Engage Platform, delivering reliable, high-performance backend systems.You will work within a cross-functional, autonomous team responsible for the full software lifecycle from design to deployment.Your work powers messaging and engagement features across multiple product lines, with a focus on scalability, observability, and security.This is a hands-on opportunity to shape the backend that enables world-class omnichannel communications at scale.Compensaciones / Beneficios - Develop and maintain scalable, distributed backend services and microservices using Java - Design, implement, and optimize APIs, messaging pipelines, and data models - Work with non-relational databases and ensure efficient data handling - Contribute to high-throughput messaging systems' performance and reliability - Participate in code reviews and technical discussions to drive quality and best practices - Collaborate with frontend, product, and other stakeholders to deliver aligned features - Ensure scalability, security, and observability of services across the lifecycle - Own tasks and deliver high-quality, maintainable codeResponsabilidades - 3-5 years of backend development experience with strong proficiency in Java - Solid understanding of microservices architecture and distributed systems - Experience with non-relational databases - Familiarity with event-driven architectures and Kafka - Experience designing and developing RESTful APIs - Commitment to clean, maintainable, and testable code - Experience with AI coding tools (Copilot, Claude Code, Cursor, or similar) and awareness of their benefits/risks - Strong communication skills in English and ability to work autonomously in a fast-paced teamRequisitos principales -


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