Application Engineer III - Integration
Stellar IT Solutions LLC
Application Engineer III - Integration
Location: Texas (preferred: San Antonio or Houston; flexible statewide)
Work Mode: Remote
Duration: Long-term contract
Role Overview
We are seeking a seasoned Application Engineer III - Integration to join our team and drive enterprise-level integration initiatives. This role requires deep expertise in building, debugging, and optimizing complex interconnected systems, with a strong focus on APIs, messaging, and middleware. The ideal candidate will operate at a senior engineer level, balancing hands-on technical work with system-level testing and validation in highly regulated environments.
Key Responsibilities
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Design, implement, and support enterprise integrations across APIs, messaging systems, and middleware.
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Work with message queue technologies (MQ/MQS or similar) to ensure reliable data flow.
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Debug and troubleshoot issues across distributed, interconnected systems (e.g., ESP, NuSoft, or similar platforms).
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Perform integration and system-level testing to validate end-to-end data lifecycle.
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Identify and resolve issues across multiple systems with a strong QA mindset.
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Collaborate with cross-functional teams to ensure seamless integration and compliance with standards.
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Operate in environments where engineers are responsible for both development and testing.
Required Skills & Experience
Technical Expertise
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Strong background in enterprise integrations (API, messaging, middleware).
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Hands-on experience with message queue technologies (MQ/MQS or similar).
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Familiarity with REST/SOAP APIs, data validation, and transformation.
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Proficiency in SQL and database querying.
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Strong debugging and troubleshooting skills across distributed systems.
Testing & QA Mindset
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Proven ability to perform integration and system-level testing.
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Experience validating full data lifecycle end-to-end.
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Ability to identify issues across multiple interconnected systems.
Experience Level
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7-10+ years of professional engineering experience.
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Prior experience operating at a senior or lead engineer level.
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Background in financial services or other highly regulated industries is a plus.
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