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Senior Software Engineer (Backend - C#/.NET)

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Summary

Senior backend engineer designing, building, and maintaining high-performance C#/.NET services and SQL Server databases for a financial services technology provider, on-site in Vereeniging, South Africa. Day to day: API development, automated testing, code reviews, performance tuning, and mentoring junior developers.

About the Role

Our client, a well-established financial services technology provider in Vereeniging, Gauteng , is looking for a seasoned Senior Software Engineer specializing in backend development with C# and the .NET framework. This role is critical in designing, developing, and maintaining robust, high-performance applications that support our client's core business operations. You will be part of a collaborative engineering team, contributing to all phases of the software development lifecycle. The ideal candidate possesses strong analytical skills, a deep understanding of object-oriented programming principles, and a passion for building scalable and efficient solutions. This is an on-site position, offering the opportunity to work closely with a talented team in our Vereeniging office, fostering direct collaboration and knowledge sharing. We are committed to delivering high-quality software that meets the evolving needs of the financial sector.

Key Responsibilities

  • Design, develop, and implement backend services and APIs using C# and the .NET framework.
  • Write clean, maintainable, and efficient code, adhering to industry best practices and coding standards.
  • Collaborate with cross-functional teams, including product managers, architects, and frontend developers, to define and implement software solutions.
  • Develop and manage database schemas and queries (SQL Server) to ensure data integrity and performance.
  • Implement automated testing strategies, including unit and integration tests, to ensure code quality.
  • Troubleshoot, debug, and resolve software defects and production issues.
  • Participate in code reviews, providing constructive feedback to team members.
  • Contribute to architectural discussions and technology selection for new features and systems.
  • Optimize application performance and scalability.
  • Mentor junior developers and share technical expertise within the team.
  • Ensure adherence to security best practices throughout the development process.

Requirements

  • Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent professional experience.
  • 5+ years of professional experience in backend software development using C# and .NET (Core).
  • Strong understanding of object-oriented programming (OOP) principles and design patterns.
  • Proficiency in working with SQL Server databases, including query optimization and schema design.
  • Experience with developing and consuming RESTful APIs.
  • Familiarity with front-end technologies (e.g., JavaScript, Angular, React) is a plus.
  • Experience with version control systems, preferably Git.
  • Knowledge of cloud platforms (e.g., Azure) is advantageous.
  • Excellent problem-solving, analytical, and debugging skills.
  • Strong communication and teamwork skills.
  • Experience with Agile development methodologies.

Benefits

This on-site role offers a competitive salary, comprehensive health and retirement benefits, opportunities for professional development and training, and the chance to work on impactful projects within the financial technology sector. You will be an integral part of a dedicated team in our Vereeniging office, contributing to innovation and excellence.

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