Application Engineer III – Integration

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

Design, implement, and support enterprise integrations across APIs, messaging systems, and middleware.

Work with message queue technologies (MQ/MQS or similar) to ensure reliable data flow.

Debug and troubleshoot issues across distributed, interconnected systems (e.g., ESP, NuSoft, or similar platforms).

Perform integration and system-level testing to validate end-to-end data lifecycle.

Identify and resolve issues across multiple systems with a strong QA mindset.

Collaborate with cross-functional teams to ensure seamless integration and compliance with standards.

Operate in environments where engineers are responsible for both development and testing.

Required Skills & Experience

Technical Expertise

Strong background in enterprise integrations (API, messaging, middleware).

Hands-on experience with message queue technologies (MQ/MQS or similar).

Familiarity with REST/SOAP APIs, data validation, and transformation.

Proficiency in SQL and database querying.

Strong debugging and troubleshooting skills across distributed systems.

Testing & QA Mindset

Proven ability to perform integration and system-level testing.

Experience validating full data lifecycle end-to-end.

Ability to identify issues across multiple interconnected systems.

Experience Level

7–10+ years of professional engineering experience.

Prior experience operating at a senior or lead engineer level.

Background in financial services or other highly regulated industries is a plus.