AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today’s five billion mobile subscribers and finally bring broadband to the billions who remain unconnected. Position Summary: AST SpaceMobile is seeking an Integration & Test (I&T) Systems Engineer (Epsilon3 Developer) to join our Enterprise Applications team, specializing in Epsilon3 interfaces and integrations for spacecraft Integration & Test operations.

As the platform of record for I&T, the successful candidate will design, develop, configure, implement, and maintain Epsilon3-based procedures, test plans, and data integrations that streamline test execution, ensure real-time capture of test and telemetry data, and maintain accurate data flows between Epsilon3, test equipment/GSE, ERP, and PLM systems.

Requirements

verification, anomaly and non-conformance tracking, and test data acquisition — picking up serialized, as-built units at the handoff from assembly to test.

traceability, and dashboards, while maintaining Epsilon3 solutions tailored to I&T campaigns across environmental, RF, and functional test. This role partners closely with test, systems, and quality engineering teams to translate real-world I&T needs into robust, user-friendly Epsilon3 solutions that enable scalability and efficiency.

verification, and full as-run test history. Integrate Epsilon3 with test equipment and ground support equipment (GSE), telemetry systems, and environmental test assets (thermal vacuum, vibration/shock, RF, and functional test stands) for real-time data acquisition directly into procedure steps. Administer the Epsilon3 environment, including user and role management, system configuration, and REST API/connector integration with ERP, PLM, and Tulip (MES) to receive serialized, as-built unit data at the assembly-to-test handoff.

verification status, anomaly/non-conformance (NCR) tracking, CAPA status, and test readiness. Own procedure version control, redlines, in-line feedback, and approval workflows during live test campaigns, including at remote test and launch site locations.

, translate them into technical designs, perform testing, and support UAT and campaign rollout. Document system designs, configurations, and standard work; establish auditing and change control processes for procedure revisions, test article changes, and releases. Monitor and resolve data synchronization issues between Epsilon3, Tulip, ERP, and PLM; implement systemic rules and automation to improve data quality and reduce manual handoffs.

Serve as the primary Jira support contact for Epsilon3/I&T tooling requests; manage ticket triage, tracking, and reporting to Test, Systems, and IT leadership. Mentor and train test engineers and technicians on Epsilon3 procedure authoring, execution, and best practices; drive continuous improvement across I&T operations.

Key Responsibilities

: Develop, configure, and maintain Epsilon3 test procedures, test plans, test cases/points, and connectors to support Integration & Test (I&T) campaigns, digital work instructions,

Integration & Test Systems Engineer (Epsilon3 Developer)