Software Developer - API modernization

Apex Systems; Maryland Heights (MO); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

401K

ESPP

HSA

EAP

Training opportunities

Job summary

Everforth Apex is seeking a Software Developer to support an API modernization initiative in Maryland Heights, MO. The role focuses on migrating existing APIs to Spring-based services and advancing toward AI-enabled customer support solutions.

The ideal candidate has backend API development experience, RESTful service understanding, and a track record in modernizing legacy integrations. This position offers exposure to high-visibility customer support platforms and collaborative, cross-team work.

Qualifications

• 3+ years of software development experience or 6+ years for Senior level.
• Strong Java development experience.
• Experience developing RESTful APIs and consuming/developing web services.
• Experience with Spring Boot and related Spring technologies.
• Understanding of API design, integration patterns, and microservices architecture.
• Knowledge of source control tools such as Git.
• Strong troubleshooting and problem-solving skills.

Responsibilities

• Analyze existing integration logic and implementations.
• Translate workflows and API functionality into modern Spring-based services.
• Design, develop, and maintain REST APIs supporting platform capabilities.
• Collaborate with architects, developers, business stakeholders, and integration teams to modernize legacy services.
• Participate in API migration efforts supporting customer troubleshooting, repair, and support workflows.
• Ensure scalability, reliability, security, and performance of newly developed APIs.
• Assist with integration efforts related to AI-enabled customer support and workflow automation initiatives.
• Participate in code reviews, design discussions, testing, and deployment activities.
• Create technical documentation and support knowledge transfer activities.
• Work closely with both onshore and offshore development resources.

Skills

Java development

RESTful APIs

Spring Boot

Microservices

API design

Troubleshooting

Tools

Spring Boot

Git

Job description

Job#: 3051961

Job Description

Software Developer - API modernization

Location: Maryland Heights, MO (Onsite)

Role Overview

We are seeking a Software Developer to support a strategic API modernization initiative. This role will focus on migrating existing APIs to Spring-based services and supporting the evolution toward AI-enabled customer support solutions. The ideal candidate will possess backend API development experience, an understanding of RESTful services, and experience modernizing legacy integrations. This position offers the opportunity to work on high-visibility customer support platforms.

Key Responsibilities

• Analyze existing integration logic and implementations.
• Translate workflows and API functionality into modern Spring-based services.
• Design, develop, and maintain REST APIs supporting platform capabilities.
• Collaborate with architects, developers, business stakeholders, and integration teams to modernize legacy services.
• Participate in API migration efforts supporting customer troubleshooting, repair, and support workflows.
• Ensure scalability, reliability, security, and performance of newly developed APIs.
• Assist with integration efforts related to AI-enabled customer support and workflow automation initiatives.
• Participate in code reviews, design discussions, testing, and deployment activities.
• Create technical documentation and support knowledge transfer activities.
• Work closely with both onshore and offshore development resources.

Required Qualifications

This position may be filled at a level II or III, depending on candidate experience.

Software Developer II

• 3+ years of software development experience.
• Strong Java development experience.
• Experience developing RESTful APIs and consuming/developing web services.
• Experience with Spring Boot and related Spring technologies.
• Understanding of API design, integration patterns, and microservices architecture.
• Knowledge of source control tools such as Git.
• Strong troubleshooting and problem-solving skills.

Software Developer III

• 6+ years of software development experience.
• Advanced Java and Spring Boot expertise.
• Proven experience modernizing or migrating legacy integration platforms.
• Strong understanding of microservices, API management, and enterprise integration patterns.
• Ability to lead technical design discussions and mentor other developers.
• Experience working across complex enterprise environments.

Preferred Qualifications

• Experience with Tibco BusinessWorks, Tibco EMS, or related Tibco integration technologies.
• Experience converting or modernizing Tibco-based integrations.
• Exposure to AI, conversational AI, Agentic AI, IVA, IVR, or customer support platforms.
• Experience supporting call center or customer service applications.
• Full-stack or UI development experience.
• Cloud platform experience.
• Telecommunications industry experience.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.

© 2026 Everforth, Inc. All rights reserved.

Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex.