Demo

Developer Middleware Integration 3

Apex Systems
San Antonio, TX Full Time
POSTED ON 1/6/2026
AVAILABLE BEFORE 2/4/2026
Job#: 3008430

Job Description:

Job Title: Developer Middleware Integration III

Location: San Antonio, TX (Remote is ok)

Job Summary:

The Developer Middleware Integration III is responsible for the design, development, administration, and performance tuning of middleware platforms and enterprise integration solutions. This role supports mission-critical systems and ensures seamless communication between applications across the organization. The ideal candidate will have extensive experience with middleware technologies and integration tools, particularly in utility or public sector environments.

Key Responsibilities:

  • Develop, administer, and optimize middleware platforms including IBM ACE, MuleSoft, IBM MQ, Kafka, and others.
  • Design and implement APIs using IBM ACE and MuleSoft.
  • Perform installation and configuration of middleware tools in high availability environments.
  • Tune JVMs and manage application servers such as Tomcat, Weblogic, and WebSphere.
  • Develop and maintain integration components using Java, ABAP, Perl, Shell Scripting, XSLT, DataWeave, and SQL.
  • Support Service-Oriented Architecture (SOA) using SOAP, WSDL, and RESTful services (RAML/Swagger).
  • Administer databases including Oracle, SQL Server, and Hadoop on UNIX and Windows platforms.
  • Collaborate across teams to manage multiple priorities and projects.
  • Apply project management principles and contribute to documentation and communication efforts.
  • Perform other duties as assigned.

Minimum Qualifications:

  • Bachelor’s degree in Information Systems, Engineering, Computer Science, or related field from an accredited university.
  • Significant experience with at least 7 of the following technologies/tools:
    • IBM ACE (App Connect Enterprise)
    • MuleSoft
    • IBM MQ, Active MQ, Kafka
    • IBM WebSphere Application Server, Tomcat, Weblogic
    • API development and administration
    • Java or ABAP programming
    • JVM tuning
    • SOAP, WSDL, RESTful services (RAML/Swagger)
    • Oracle, SQL Server, Hadoop
    • Perl, Shell Scripting, XSLT, DataWeave, SQL
  • Strong analytical, problem-solving, and organizational skills.
  • Excellent verbal and written communication abilities.
  • Ability to work independently and collaboratively.
  • Proficient in Microsoft Office Suite.
  • Must have a favorable driving record.

Preferred Qualifications:

  • Master’s degree in Information Systems or related field.
  • IBM ACE certification.
  • MuleSoft certification.
  • Experience in the utility industry or public sector.
  • Familiarity with NERC standards.
  • Experience with Oracle Cloud, Rabbit MQ, and WebSphere.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join 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 ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: 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. 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, 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. 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 Apex team member can provide.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join 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 ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: 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. 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, 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. 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 Apex team member can provide.

Apex Systems is part of the Commercial Segment of ASGN Incorporated.

NYSE: ASGN

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

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. 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 Apex Systems.

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