Lead API Developer
Cleveland, Ohio
Experience: 10
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 383170
Date Posted: 11/06/2026
Shortcut: http://jobs.systemone.com/8IFeIO
Job Title: Lead API Developer
Location: Pittsburgh, PA | Cleveland, OH | Dallas, TX
Type: Full-time
Work Model: Hybrid – onsite and remote
We are seeking a Lead API Developer with strong expertise in Java, Spring Boot, and Microservices to lead the design, development, and support of enterprise-scale APIs and backend services. This role will provide technical leadership, mentor developers, and drive best practices across API development initiatives.
Responsibilities
- Design, develop, and maintain scalable APIs, microservices, and backend applications
- Lead API development efforts and provide technical mentorship to team members
- Build and support Java-based RESTful services integrated with internal and external systems
- Drive API standards, architecture decisions, and development best practices
- Participate in solution design, code reviews, and technical planning
- Create technical designs and translate business requirements into scalable solutions
- Support release planning, change management, production deployments, and post-release validation
- Troubleshoot and optimize applications across multiple environments
- Collaborate with business, product, and technical stakeholders in an Agile environment
Requirements
- 10+ years of Java/J2EE development experience
- Strong experience with Spring Boot and Microservices Architecture
- 8+ years of RESTful and/or SOAP web services development
- Experience with REST APIs, XML, JSON, and Swagger/OpenAPI
- 5+ years of Angular, JavaScript, HTML, and CSS
- 5+ years of GitHub, Jenkins, and CI/CD pipeline experience
- Experience writing and maintaining unit tests
- Experience with Agile software development methodologies
- Experience with Release Management and production deployment
Preferred Qualifications
- Experience with API management platforms such as Apigee
- Knowledge of DevOps and deployment automation tools
- Experience supporting large-scale enterprise applications
- Strong communication and leadership skills with the ability to work across cross-functional teams
System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
#LI-
Ref: #404-IT Pittsburgh
-
Lead API Developer
Pittsburgh, Pennsylvania
Job Title: Lead API Developer Location: Pittsburgh, PA | Cleveland, OH | Dallas, TX Type: Full-time Work Model: Hybrid – onsite and remote We are seeking a Lead API Developer with strong expertise in Java, Spring Boot, and Microservices to lead the des...
Date Posted: 11/06/2026 Recommended
-
Lead API Developer
Pittsburgh, Pennsylvania
Job Title: Lead API Developer Location: Pittsburgh, Pennsylvania Type: Permanent Full Time Responsibilities Lead the design, development, and maintenance of high-performance APIs and microservices. Collaborate with cross-functional teams to gather requ...
Date Posted: 09/30/2026 Recommended
-
Full Stack Developer
Pittsburgh, Pennsylvania
Job Title: Full Stack Developer Location: Pittsburgh, PA Type: Permanent Full Time Work Model: Onsite Responsibilities Design, develop, maintain, and implement APIs, microservices, and frontend components. Build responsive and dynamic user interfaces u...
Date Posted: 11/03/2026 Recommended
-
Full Stack Developer
Strongsville, Ohio
Job Title: Full Stack Developer Location: Strongsville, Ohio Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities • Design, develop, maintain, and implement APIs, microservices, and front end components • Build responsive, ...
Date Posted: 09/30/2026 Recommended
-
Mid-Level Java API Developer
Pittsburgh, Pennsylvania
Job Title: Mid- Level Java API Developer Location: Pittsburgh, PA Type: Permanent Full Time Work Model: Onsite Responsibilities Design, develop, maintain, and implement APIs, microservices, and backend components. Collaborate with development teams to ...
Date Posted: 11/02/2026 Recommended
-
Lead API Developer
Pittsburgh, Pennsylvania
Job Title: Lead API Developer Location: Pittsburgh, Pennsylvania, United States Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities Design, develop, and maintain high-performance APIs that power the system. Collaborate wit...
Date Posted: 09/30/2026 Recommended
-
Senior Java Full Stack Developer
Dallas, Texas
Job Title: Senior Java Full Stack Developer Location: Pittsburgh, PA, Cleveland, OH, or Dallas, TX. Type: Direct Hire Work Model: Onsite Hours: five days a week Overview: This position is located at our client site five days a week in either Pittsburgh...
Date Posted: 10/29/2026 Recommended
-
Senior Java Full Stack Developer
Pittsburgh, Pennsylvania
Job Title: Senior Java Full Stack Developer Location: Pittsburgh, PA, Cleveland, OH, or Dallas, TX. Type: Direct Hire Work Model: Onsite Hours: five days a week Overview: This position is located at our client site five days a week in either Pittsburgh...
Date Posted: 11/02/2026 Recommended
-
Senior AWS Java Full Stack Developer
Plano, Texas
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, LA / Knoxville, TN / Columbia, SC / Birmingham, AL / Plano, TX. Type: Permanent Full Time Work Model: Hybrid – onsite and remote We are hiring a Senior AWS Java Full Stack Developer t...
Date Posted: 11/05/2026 Recommended
-
Senior AWS Java Full Stack Developer
Columbia, South Carolina
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, LA / Knoxville, TN / Columbia, SC / Birmingham, AL / Plano, TX. Type: Permanent Full Time Work Model: Hybrid – onsite and remote We are hiring a Senior AWS Java Full Stack Developer t...
Date Posted: 11/05/2026 Recommended
-
Senior AWS Java Full Stack Developer
Birmingham, Alabama
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, LA / Knoxville, TN / Columbia, SC / Birmingham, AL / Plano, TX. Type: Permanent Full Time Work Model: Hybrid – onsite and remote We are hiring a Senior AWS Java Full Stack Developer t...
Date Posted: 11/05/2026 Recommended
-
Java Developer
Albany, New York
Lead Java Developer Albany, NY – once a month onsite Anticipated Start Date: 1/28/2027 Long term contract W2 or C2C Application deadline: 11/11/2026 The mission of the Integrated Eligibility System (IES) is to enhance the well-being of New Yorkers by t...
Date Posted: 11/05/2026 Recommended
-
Senior AWS Java Full Stack Developer
Plano, Texas
Job Title: Senior AWS Java Full Stack Developer Duration: Full Time / Permanent Position Location: Lafayette, LA | Knoxville, TN | Birmingham, AL | Columbia, SC | Plano, TX Work Mode: 5 Days Onsite Position Description Systemone is seeking a Senior AWS...
Date Posted: 10/15/2026 Recommended
-
AWS Full Stack Java Developer
Knoxville, Tennessee
Job Title: AWS Full Stack Java Developer Location: Columbia, South Carolina, United States Type: Direct Hire Work Model: Hybrid – onsite and remote Overview System One is seeking a AWS Full Stack Java Developer? to support the development, modernizatio...
Date Posted: 09/20/2026 Recommended
-
AWS Full Stack Java Developer
Columbia, South Carolina
Job Title: AWS Full Stack Java Developer Location: Columbia, South Carolina, United States Type: Direct Hire Work Model: Hybrid – onsite and remote Overview System One is seeking a AWS Full Stack Java Developer? to support the development, modernizatio...
Date Posted: 09/24/2026 Recommended
-
Calypso Developer
Salt Lake City, Utah
Job Title: Calypso Developer Location: Salt Lake City, UT, United States Type: Permanent Full Time Work Model: Remote – offsite Responsibilities Design, develop, customize, and support Calypso applications, workflows, extensions, and integrations suppo...
Date Posted: 10/06/2026 Recommended
-
Senior AWS Java Full Stack Developer
Plano, Texas
Job Title: Senior AWS Java Full Stack Developer Location: Plano, TX Type: Permanent Full Time Work Model: Hybrid – onsite and remote This position is required in one of the following locations: Lafayette, LA, Knoxville, TN, Birmingham, AL & Plano, TX. ...
Date Posted: 11/03/2026 Recommended
-
Senior AWS Java Full Stack Developer
Knoxville, Tennessee
Job Title: Senior AWS Java Full Stack Developer Location: Knoxville, TN Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities • Lead the development and support of cloud-based applications in an AWS-focused financial service...
Date Posted: 10/22/2026 Recommended
-
Senior AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, Louisiana Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities • Lead the development and support of cloud-based applications in an AWS-focused financial ...
Date Posted: 10/13/2026 Recommended
-
Senior AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, LA Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities Lead the development and support of cloud-based applications in an AWS-focused financial services ...
Date Posted: 11/05/2026 Recommended
-
Senior AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: Senior AWS Java Full Stack Developer Location: Lafayette, LA Type: Permanent Full Time Work Model: Hybrid – onsite and remote Responsibilities Lead the development and support of cloud-based applications in an AWS-focused financial services ...
Date Posted: 10/22/2026 Recommended
-
AWS Full Stack Java Developer
Knoxville, Tennessee
Senior AWS Java Full Stack Developer Job Type: Permanent Full-Time Locations: Lafayette, LA | Knoxville, TN | Columbia, SC | Birmingham, AL Position Description We are seeking an experienced Senior AWS Java Full Stack Developer to join a small, high-pe...
Date Posted: 09/23/2026 Recommended
-
AWS Full Stack Java Developer
Knoxville, Tennessee
Senior AWS Java Full Stack Developer Job Type: Permanent Full-Time Locations: Lafayette, LA | Knoxville, TN | Columbia, SC | Birmingham, AL Position Description We are seeking an experienced Senior AWS Java Full Stack Developer to join a small, high-pe...
Date Posted: 09/19/2026 Recommended
-
AWS Java Full Stack Developer
Knoxville, Tennessee
Job Title: AWS Java Full Stack Developer Location: Lafayette, Louisiana Type: Full-time Work Model: Hybrid – onsite and remote Responsibilities Build and support REST APIs and microservices in an AWS-focused financial services environment. Integrate us...
Date Posted: 10/30/2026 Recommended
-
AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: AWS Java Full Stack Developer Location: Lafayette, Louisiana Type: Full-time Work Model: Hybrid – onsite and remote Responsibilities Build and support REST APIs and microservices in an AWS-focused financial services environment. Integrate us...
Date Posted: 10/30/2026 Recommended
-
AWS Java Full Stack Developer
Plano, Texas
Job Title: AWS Java Full Stack Developer Location: Lafayette, Louisiana Type: Full-time Work Model: Hybrid – onsite and remote Responsibilities Build and support REST APIs and microservices in an AWS-focused financial services environment. Integrate us...
Date Posted: 10/30/2026 Recommended
-
AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: AWS Java Full Stack Developer Location: Lafayette, Louisiana Type: Full-time Work Model: Hybrid – onsite and remote Responsibilities Build and support REST APIs and microservices in an AWS-focused financial services environment. Integrate us...
Date Posted: 10/22/2026 Recommended
-
Sr. Software Developer
Gaitherburg, VA
Senior Software Engineer Location: Gaithersburg, MD Schedule: Full Time Work Arrangement: Onsite Travel Required: No Shift: Day Clearance Required: Active Top Secret/SCI with the ability to successfully complete a polygraph examination Position Overvie...
Date Posted: 09/23/2026 Recommended
-
AWS Java Full Stack Developer
Lafayette, Louisiana
Job Title: AWS Java Full Stack Developer Location: Lafayette, LA / Knoxville, TN / Columbia, SC / Birmingham, AL / Plano, TX. Type: Full-time Work Model: Hybrid – onsite and remote We are hiring a AWS Java Full Stack Developer to develop, maintain, and...
Date Posted: 11/05/2026 Recommended
-
AWS Java Full Stack Developer
Columbia, South Carolina
Job Title: AWS Java Full Stack Developer Location: Lafayette, LA / Knoxville, TN / Columbia, SC / Birmingham, AL / Plano, TX. Type: Full-time Work Model: Hybrid – onsite and remote We are hiring a AWS Java Full Stack Developer to develop, maintain, and...
Date Posted: 11/05/2026 Recommended
⚠️ Protecting Job Seekers from Identity Scams
At System One, your privacy and security are important to us. As job-related scams continue to target job seekers, we want to help you recognize and avoid common recruitment fraud. Identity theft scams often involve individuals, also known as "scammers," posing as recruiters or employers to obtain sensitive personal information, such as Social Security numbers, bank account details, or copies of driver’s licenses, with the goal of stealing identities, accessing financial accounts, or creating fraudulent accounts in a victim’s name.