Johannesburg: Senior Ruby on Rails Developer posted by Datafin
Posted on 2025-07-06 00:00:00
| Employer | Datafin |
|---|---|
| Category | Other IT/Computer |
| Location | Gauteng / Johannesburg |
Job Summary
Johannesburg – Gauteng – South Africa
- Design, develop, and maintain high-performance Ruby on Rails applications, handling both backend and frontend components.
- Build and optimize RESTful APIs, database schemas, and user interfaces to ensure seamless functionality and user experience.
- Implement responsive, accessible frontend designs using HTML, CSS, JavaScript, and frameworks like React, Vue.js, or similar.
- Write clean, efficient, and well-documented code following Ruby on Rails conventions and industry best practices.
- Conduct code reviews to ensure consistency, performance, and adherence to coding standards.
- Refactor legacy code to improve maintainability, scalability, and performance.
- Develop and maintain comprehensive test suites using tools like RSpec, Minitest, or Capybara to ensure robust code quality.
- Implement best-practice test cases, including unit, integration, and end-to-end tests, to minimize bugs and regressions.
- Advocate for and enforce a culture of TDD within the development team.
- Lead and mentor a team of developers, providing technical guidance and fostering a collaborative, high-performing environment.
- Manage project timelines, delegate tasks, and ensure on-time delivery of features and releases.
- Collaborate with product managers, designers, and stakeholders to translate requirements into technical specifications.
- Optimize application performance through efficient database queries, caching strategies, and server-side improvements.
- Ensure applications are secure, scalable, and maintainable, adhering to best practices for cloud-based deployments.
- Troubleshoot and resolve complex technical issues in production environments.
- Work closely with cross-functional teams to align development efforts with business objectives.
- Communicate technical concepts clearly to non-technical stakeholders, providing updates on progress and risks.
- Contribute to Agile/Scrum processes, including sprint planning, stand-ups, and retrospectives.
- Education:
- Bachelors degree in Computer Science, Software Engineering, or a related field (or equivalent experience).
- Experience:
- 8+ years of professional experience developing Ruby on Rails applications, with at least 2 years in a senior or lead role.
- Proven full-stack development experience, including frontend frameworks (e.g., React, Vue.js, or Angular) and backend systems.
- 2+ years of technical leadership or management experience, including mentoring developers and managing projects.
- Technical Proficiency:
- Expert-level knowledge of Ruby on Rails, including MVC architecture, Active Record, and Rails 6/7 features.
- Strong experience with relational databases (e.g., PostgreSQL, MySQL) and query optimization.
- Proficiency in frontend technologies: HTML5, CSS3, JavaScript, and modern frameworks.
- Familiarity with testing frameworks (e.g., RSpec, Minitest, Capybara) and best practices for TDD/BDD.
- Experience with version control (Git), CI/CD pipelines, and cloud platforms (e.g., AWS, Heroku, or Azure).
- Code Quality:
- Demonstrated ability to write clean, modular, and efficient code with a focus on maintainability.
- Deep understanding of design patterns, SOLID principles, and RESTful architecture.
- Familiarity with code testing applications such as Circle CI and Code Climate.
- Bug identification via Airbrake
- Soft Skills:
- Strong leadership and mentoring abilities, with a track record of building cohesive teams.
- Excellent problem-solving skills and attention to detail.
- Effective communication skills, with the ability to articulate technical concepts to diverse audiences.
- Preferred Qualifications:
- BSc Computer Science.
- Familiarity with DevOps tools (e.g., Docker, Kubernetes, Ansible) and infrastructure as code.
- Contributions to open-source Ruby/Rails projects or a strong GitHub portfolio.
- Agile/Scrum certification (e.g., Certified Scrum Developer) or experience leading Agile teams.
- Technical leadership
- Clean code advocacy
- Test-driven development
- Full-stack expertise
- Agile project delivery
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