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Karsun Solutions LLC API Developer in Herndon, Virginia

Karsun Solutions LLC is in the business of solving problems. Since 2009 as a premier consulting services company with a culture of innovation, Karsun offers a portfolio of Enterprise Modernization services to both civilian and defense Federal agencies. Karsun’s list of strong clientele includes U.S. Department of Homeland Security, U.S. General Services Administration, and the Federal Aviation Administration. Karsun combines years of institutional knowledge with a deep commitment to customer relationships, on every project.

  • Develop and maintain API's and integrations

  • Diagnose and resolve API access and performance issues

  • Assure security of access to data via API GET and SET methods

  • Develop, implement, and maintain change control and testing processes for modifications to API's

  • Create and maintain technical documentation

  • Develops the code based on high level design and low-level design.

  • Design and deploy data table structures used as sources for API's

  • Scrum based delivery

Required skills:

  • 8+ years of experience developing enterprise applications using Java (1.8).

  • 4+ years of experience in Spring Boot, Spring Framework, Hibernate

  • 4+ years of experience in API design patterns, Advanced proxies, Analytics, BaaS, Developer portal.

  • API Key Validation, Authentication, Authorization and Identity

  • Demonstrated experience in REST/RESTful, Microservices, SOAP Services (for legacy integrations)

  • Working experience in DevOps tools like Maven, Jenkins and Git.

  • 2 + years of experience in SQL

  • Experience in implementing applications on AWS or any other cloud services

Desired skills:

  • Working knowledge on MuleSoft, React, Collabra, Swagger

  • Sun Certified Java Professional


  • Requires a Bachelor’s degree in Computer Science or other IT degree

  • Engineering, math, and/or science degrees are acceptable substitute degrees

  • Minimum of 8 years of relevant experience

  • Relevant Certification

  • The ability to successfully obtain and maintain a U.S. Suitability/Public Trust Background Clearance


Karsun Solutions pays 100% of employee only Medical, Dental, Life Insurance, Short Term Disability and Long-term disability.

We offer Vision coverage, 401(k) with immediate vesting and a competitive PTO policy.

Karsun Solutions is an Equal Employment Opportunity (EEO) employer. It is the policy of the Company to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.

ID: 2283

External Company Name: Karsun Solutions, LLC

External Company URL: www.karsun-llc.com