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# Software Development Engineer

- **Company:** Isabel
- **Location:** Brussel, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Amazon Elastic Compute Cloud, User Authentication, Code Review, Databases, Continuous Integration, Database Queries, Linux, Monitoring of Systems, JSON, PostgreSQL, Linux Commands, Message Broker, OAuth, Systems Development Life Cycle, RabbitMQ, Ruby on Rails, Openid Connect, Ruby, Swagger, JSON Web Token, Simple Object Access Protocol (SOAP), Software Engineering, Web Application Frameworks, Openapi, Rspec, Claude Code, AI Coding Agents, Backend, Git, Vue.js, Event Driven Architecture, Git Flow, Front End Software Development, Api Gateway, Kibana, Restful APIs, Webhooks, Docker, Elixir, Elk Stack
- **Published:** October 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=a00a741c706fd2e5

## About the Role

* Ruby & Ruby on Rails - at least 5 years of hands-on experience with Ruby on Rails, including ActiveRecord, RSpec or Minitest, and background job processing (Sidekiq or similar).
 * Front-end development - solid experience with JavaScript and at least one modern front-end framework.
 * Databases - strong SQL skills (PostgreSQL preferred) and experience with ORMs such as ActiveRecord.
 * REST APIs - experience designing and consuming REST APIs, webhooks, JSON and OpenAPI/Swagger documentation.
 * Git & CI/CD - comfortable with git workflows, CI/CD pipelines and doing code reviews.
 * Linux - at ease with the Linux command line in daily work.
 * Software delivery - you understand the full development lifecycle, from turning business needs into technical solutions through testing to release and change management.

Strong Plus

 * Vue.js - hands-on experience with Vue.js (ideally Vue 3).
 * Elixir / Phoenix - experience with Elixir and Phoenix, or a real interest in learning them. Part of our backend is written in Elixir.
 * AI-assisted development - interest in working with AI coding tools as part of your daily workflow. We use Claude Code across the team.

Nice to Have

 * Messaging - knowledge of RabbitMQ or other message brokers and event-driven architectures.
 * Docker - building and running containerized applications.
 * Security - understanding of OAuth 2.0, OpenID Connect, JWT and token-based authentication, encryption and HTTPS.
 * Monitoring & observability - experience with Kibana (ELK stack) and APM tools.
 * AWS - familiarity with services like ECS, EC2 or API Gateway.
 * Other API formats - JSON:API, SOAP.

## Description

* Develop software products that meet defined functional and non-functional requirements, proactively clarifying ambiguities when specifications are incomplete or evolving.
 * Design or contribute to pragmatic technical solutions aligned with the innovation objectives of future products, balancing speed, quality, and sustainability.
 * Assess and compare off-the-shelf solutions with in-house development options to identify the most effective and efficient approach.
 * Apply industry standards and best practices across software development, integration, and delivery.
 * Actively participate in, and when required lead, the investigation and resolution of problems and incidents through to final resolution.
 * Ensure the quality, performance, and sustainable evolution of applications in both the short and long term.
 * Drive continuous improvement to ensure software remains robust, maintainable, and adaptable over time.

What makes you a great fit

The role requires comfort with ambiguity and the ability to adapt quickly to changing needs, requirements, and technologies. Continuous learning, adaptability, and ongoing improvement are core to how the team operates and how success in this role is defined.