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Full Stack Developer – API Integration

Tri-Force Consulting Services, Inc.

Job Location:

Philadelphia, PA - USA

Salary: Not provided by the employer

Experience Required: 5years

Posted: 11 August 2026 (30+ days ago)

Application Deadline: 8 November 2026

Vacancies: 1 Vacancy

Job Summary

Title: Full Stack Developer API Integration

Job Type: Contract 2 to 3 Months Location: Philadelphia PA / Hybrid or Remote

Job Description

Tri-Force Consulting Services is seeking a Senior Full Developer / API Integration Developer to support

backend application development REST API development business logic and integration with enterprise systems.

The successful candidate will work closely with backend mobile QA and cloud engineers in an Agile environment.

Responsibilities

Develop backend services using C# and Core.

Design and develop RESTful APIs.

Build JSON/OpenAPI-based API contracts.

Implement application business logic and workflows.

Develop integrations with external and enterprise systems.

Implement data access and database functionality.

Work with PostgreSQL and SQL databases.

Implement authentication and authorization.

Develop validation error handling logging and retry mechanisms.

Support mobile application API integration.

Write unit and integration tests.

Participate in peer code reviews.

Troubleshoot production and integration issues.

Support Azure deployment and CI/CD processes.

Required Skills

5 years of software development experience.

Strong C# and Core/.NET.

Strong REST API development.

JSON / OpenAPI / Swagger.

SQL.

PostgreSQL or equivalent relational database.

Enterprise/API integration experience.

OAuth 2.0 / JWT or equivalent authentication technologies.

Unit and integration testing.

Git.

Agile/Scrum development.

Preferred Skills

Microsoft Azure.

Azure API Management.

Azure App Service.

Azure DevOps.

OAuth 2.0 / OpenID Connect.

Microservices.

Third-party API integrations.

GIS/location/address APIs.

Mobile application backend development.

Government/public-sector systems.

About Us:

Since 2000 Tri-Force Consulting Services () has been an MBE/SDB certified IT Consulting

firm in the Philadelphia region. Tri-Force specializes in IT staffing software development (web and mobile apps)

systems integration data analytics system automation cybersecurity and cloud technology solutions for government

and commercial clients. Tri-Force works with clients to overcome obstacles such as increasing productivity

increasing efficiencies through automation and lowering costs. Our clients benefit from our three distinguishing

core values: integrity diligence and technological excellence.

Tri-Force is a six-time winner among the fastest-growing companies in Philadelphia and

a four-time winner on the Inc. 5000 list of the nations fastest-growing companies.

Required Skills:

5 years of software development experience. Strong C# and Core/.NET. Strong REST API development. JSON / OpenAPI / Swagger. SQL. PostgreSQL or equivalent relational database. Enterprise/API integration experience. OAuth 2.0 / JWT or equivalent authentication technologies. Unit and integration testing. Git. Agile/Scrum development. Preferred Skills Microsoft Azure. Azure API Management. Azure App Service. Azure DevOps. OAuth 2.0 / OpenID Connect. Microservices. Third-party API integrations. GIS/location/address APIs. Mobile application backend development. Government/public-sector systems.

Required Education:

Bachelors degree in information systems Computer Science or equivalent experience

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