Senior API Developer - Remote (WFH)

Washington, DC, US | Phoenix, AZ, US | Oak Ridge, TN, US | Austin, TX, US | Oregon, US | Austin, TX, US

Cognitive is seeking a Senior API Developer with advanced knowledge and expertise in applications programming methodologies and disciplines. We are looking for someone who has expert-level knowledge of system analysis and business problem-solving, is proficient with business reporting, and has advanced knowledge of Structured Query Language (SQL) in Microsoft SQL and Oracle environments, as well as knowledge of cloud technologies. 

Duties Include: 

  • Design, develop, and maintain APIs that meet high-performance and scalability requirements
  • Experience in developing REST API services
  • Collaborate with cross-functional teams to gather requirements and define API specifications
  • Optimize API performance, security, and reliability
  • Troubleshoot and debug API¬†issues
  • Ability to decrypt JSON, XML structured data into normalize data¬†sets
  • Creating high-availability applications
  • Writes clean, efficient, and well documented code that adheres to software development standards and best¬†practices
  • Participates in software design and architecture discussions to ensure the software meets the functional and non-functional¬†requirements
  • Collaborates with other developers, testers, and stakeholders to ensure¬†timely¬†delivery of software features and bug¬†fixes
  • Performs code reviews and provides construction feedback to other team¬†members
  • Continuously learns and stays¬†up-to-date¬†with the latest industry trends, tools, and technologies related to C#/.NET development

Required Skills: 

  • Proven experience in API development, including REST and SOAP
  • Strong¬†proficiency¬†in one or more programming languages commonly used in API development in¬†C#/.NET
  • Knowledge of database systems and data modeling
  • Strong problem-solving and debugging¬†skills
  • Excellent communication and teamwork skills
  • Ability to adapt to¬†new technologies¬†and frameworks¬†quickly
  • Proficiency¬†in version control systems, especially Git
  • Experience with Continuous Integration and Continuous Deployment (CI/CD) tools like Jenkins
  • Knowledge of Azure API development and integration
  • Experience working in Microsoft API web services or¬†equivalent

Technical Skills: C#/.NET; Oracle SQL (SQL Developer); MS SQL; Batch, Rest Micro-services, Test Framework; SOAP and Rest architecture 

Required Education, Experience, and Clearance: 

  • Master‚Äôs or Bachelor‚Äôs‚ÄĮdegree
  • 5 years or more related experience
  • Ability to obtain a Position of Public Trust - Medium Background Investigation (MBI)
  • US Citizenship is required

Nice to Have: 

  • 3+¬†years experience¬†supporting healthcare¬†applications
  • Experience in Agile methodologies
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Job Profile


North America


United States


Agile API API Development APIs Azure C CI/CD Cloud Technologies C#/.Net Communication Continuous Integration Database Systems Data Modeling Git Jenkins JSON Micro-services REST REST API SOAP SQL Web Services XML

  • Design, develop, and maintain APIs
  • Perform code reviews
  • Stay up-to-date with industry trends
  • Write clean and efficient code

5 years


Bachelor's Master's


U.S. Citizenship is required


America/Anchorage America/Chicago America/Denver America/Los_Angeles America/New_York Pacific/Honolulu UTC-10 UTC-5 UTC-6 UTC-7 UTC-8 UTC-9