> Markdown version of [/jobs/ext/3018637-middle-software-engineer](https://www.wearedevelopers.com/jobs/ext/3018637-middle-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Middle Software Engineer

- **Company:** Xsolla
- **Location:** Valladolid, Spain
- **Contract:** Permanent contract
- **Skills:** PHP (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Automation of Tests, Big Data, Code Review, Continuous Integration, Database Design, Software Design Patterns, Programming Tools, Monitoring of Systems, Object-Oriented Software Development, Standard Sql, Systems Architecture, Systems Integration, Datadog, Postman, Grafana, Backend, Gitlab, Event Driven Architecture, Single Page Application, Gitlab-ci, Front End Software Development, Kibana, Golang, Microservices
- **Published:** September 21, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

Proven experience in backend development with strong proficiency in PHP and GoLang .
Solid understanding of object-oriented programming (OOP), software design patterns, and decomposition principles.
Experience with microservices architecture and scalable backend systems.
Strong knowledge of SQL and database design, including optimization for large datasets.
Familiarity with Postman, GitLab, console and other development tools.
Experience using monitoring and testing tools such as Grafana , Kibana , DataDog and ELK .
Ability to work independently on complex technical tasks and deliver high-quality results within deadlines.
Strong communication skills and ability to collaborate effectively with cross-functional teams.
Experience with high-load systems and event-driven architectures.
Familiarity with CI/CD tools (GitLab CI).
Background in frontend development or working with single-page applications (SPAs).
Hands-on experience using AI-powered development tools to enhance productivity.

## Description

Design, build, and maintain backend services and APIs using PHP and Go , ensuring scalability, reliability, and high performance.
Develop new microservices and enhance existing systems to support large-scale integrations and high-load payment flows.
Participate in code reviews and maintain high development standards through collaborative feedback and best practices.
Work closely with engineering, product, and partner teams to deliver high-quality solutions on schedule.
Contribute to system monitoring using tools such as Grafana , Kibana , and ELK to ensure stability and optimal performance.
Document technical specifications, system architecture, and new functionalities for transparency and maintainability.
Participate in Kanban ceremonies and maintain efficient communication with cross-functional teams.


## Related Videos

- [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company)
- [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall)
- [Debug a Kubernetes Operator](https://www.wearedevelopers.com/videos/487-debug-a-kubernetes-operator)
- [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more)
- [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling)
- [Scoring 2000 Products per Request: Performance Pitfalls in Golang](https://www.wearedevelopers.com/videos/2073-scoring-2000-products-per-request-performance-pitfalls-in-golang)

## Related Articles

- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)
- [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)