Back-end Developer

Cosmotech Philippines Inc.; Philippines; On-site; PHP 446,400 - 669,600; Full time

Job summary

A tech solutions company in the Philippines is looking for a skilled backend developer to design and maintain server-side applications and APIs. The ideal candidate will have a Bachelor's degree in Computer Science and 2-3 years of experience in C#/.NET Core and PostgreSQL. Responsibilities include ensuring API security, collaborating with frontend developers, and improving system performance. This role offers the opportunity to work with innovative technologies in a dynamic environment.

Qualifications

• 2-3 years of professional back-end development experience.
• Strong understanding of security best practices in API development.
• Strong SQL skills in schema design and performance tuning.

Responsibilities

• Design, develop, and maintain server-side applications and APIs.
• Ensure API security and enforce secure coding best practices.
• Collaborate with frontend developers to integrate APIs.

Skills

C#/.NET Core

PostgreSQL

MongoDB

Asynchronous programming

RESTful API development

Unit testing (xUnit, NUnit)

Education

Bachelor’s degree in computer science or related field

Tools

Entity Framework

Version control workflows

Job description

• Design, develop, and maintain server-side applications and APIs.
• Write clean, efficient, and maintainable code following best practices and coding standards.
• Work with relational and NoSQL databases to design schemas and optimize queries.
• Design, optimize, and maintain relational data models, writing stored procedures, views, and
  indexes for peak performance.
• Ensure API security, authentication, and authorization.
• Enforce secure-coding best practices robust audit-trail logging for all critical operations.
• Improve the performance, scalability, and security of backend systems.
• Integrate with third-party platforms, directory services, and message buses
• Ensure high availability and resilience: implement logging, metrics/monitoring and exception handling
• Collaborate with frontend developers to integrate APIs and backend services.
• Write comprehensive unit/integration tests and participate in code reviews, pair programming, and
  knowledge-sharing sessions to improve team performance.
• Troubleshoot and resolve bugs, performance bottlenecks, and system failures.
• Conduct and assist in performance and vulnerability assessment and testing.
• Bachelor’s degree in computer science, Information Technology, or related field (or equivalent
  experience).
• 2-3 years professional back-end development experience in C#/.NET Core (6+), delivering
  production-grade APIs
• 2-3 years of experience with PostgreSQL and working knowledge of MongoDB
• 2-3 years of experience in asynchronous programming, LINQ, and Entity Framework.
• Strong SQL skills: schema design, T-SQL, performance tuning, and transaction management
• Strong understanding of RESTful API development and security best practices.
• Familiarity with file storage and processing
• Experience with real-time features and background jobs
• Knowledge of unit testing frameworks (e.g., xUnit, NUnit) and mocking tools
• Experience with authentication/authorization systems, including JWT and role-based access control.
• Comfortable with version control workflows and agile best practices