Mid-Level C# Developer

1 day ago
Gauteng, South Africa Tumaini Consulting Full-time

Our client is looking for a Mid-Level Software Developer with solid backend development experience to contribute to production systems within a payment-focused technology environment. The successful candidate will work primarily with C#/.NET, relational databases and REST APIs while building the technical foundation required to progress into a senior development position.

 

What You’ll Be Responsible For:

  • Deliver backend functionality using C#/.NET.
  • Develop reliable and maintainable code using asynchronous programming and appropriate transactional patterns.
  • Build and maintain stored procedures using Oracle PL/SQL or PostgreSQL.
  • Integrate RESTful services and handle authentication, errors, retries, pagination and timeouts correctly.
  • Implement idempotent processing where required.
  • Develop meaningful unit tests covering normal, boundary and failure scenarios.
  • Contribute to pull-request reviews and provide useful technical feedback.
  • Maintain clear system documentation and operational runbooks.
  • Follow secure development practices and PCI-DSS Requirement 6 principles.
  • Ensure cardholder data is excluded from application logging.
  • Maintain dependencies and follow development security checks.
  • Use Git feature branches and clear commit and pull-request descriptions.
  • Contribute constructively during Agile ceremonies.
  • Develop understanding of cloud deployment and database performance considerations.
  • Participate in technical leadership, architecture documentation and mentoring as experience develops.

 

Essential Experience:

  • NQF 6 Diploma or NQF 7 Degree in IT, Computer Science, Software Engineering or a related field.
  • 3–5 years' professional backend development experience.
  • Strong C#/.NET experience in a production environment.
  • 2+ years' experience developing SQL queries and stored procedures in Oracle or PostgreSQL.
  • 2+ years' experience writing and maintaining unit tests.
  • 2+ years' experience integrating REST APIs.
  • 2+ years' experience with Git-based development and pull-request workflows.

 

Technical Competencies:

  • C#/.NET, async/await and error handling.
  • Transactional processing and idempotency.
  • Oracle SQL/PLSQL or PostgreSQL.
  • Stored procedure development.
  • Indexing and basic execution-plan analysis.
  • NUnit or xUnit.
  • REST authentication and integration patterns.
  • 4xx/5xx handling, retries with backoff, pagination and timeouts.
  • Git branching, pull requests and code reviews.
  • Runbooks and technical documentation.
  • Containers and serverless fundamentals.
  • Stateless application design.
  • Environment-based configuration.
  • Connection pooling and efficient retry strategies.
  • Query-performance awareness, including N+1 issues.

 

Advantageous:

  • Experience within fintech, payments or financial services.
  • Azure Developer Associate, AWS Developer Associate or comparable certification.
  • Exposure to cloud-based deployment environments.
  • Interest in mentoring and technical leadership.

 

Only shortlisted candidates will be contacted.
Submit your CV to it.jobs@tumaini.co.za or call 031 350 4018.
Visit our website for more exciting career opportunities: https://tumaini.co/
Correspondence will only be conducted with short listed candidates. Should you not hear from us within 4 days, please consider your application unsuccessful.

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