Senior Embedded Software Test Engineer

Optics11 is a fast-growing high-tech company based in Amsterdam, developing advanced fiber optic sensing systems for the most demanding environments. Our technology detects the earliest signs of failure in critical assets – from high-voltage energy infrastructure to subsea and defense applications – and gives our customers precise, real-time data they can act on. Within our Underwater Security business we develop sensing technologies that help detect and monitor underwater threats. Our solutions include OptiBarrier, designed for immediate, over-the-horizon threat detection, and OptiArray, our low-power optical thin-line towed array for unmanned underwater vehicles and submarines. The Role As a Senior Embedded Software Test Engineer at Optics11, you own the embedded software system-test capability for our sensing interrogator platforms. You define, automate, execute, and continuously improve Hardware-in-the-Loop (HIL) and box-level integration and regression testing so that software and firmware release candidates are qualified on representative hardware before they move downstream to formal verification, FAT (Factory Acceptance Test), field, or application validation. Your scope covers the integrated behavior of embedded Linux applications and services, internal and external APIs, hardware interfaces, firmware and FPGA interactions, system control, calibration and configuration, diagnostics, data acquisition, boot and update behavior, recovery mechanisms, and sensor interfaces. You build and maintain automated test frameworks, HIL benches, test harnesses, CI/CD integration, and objective release evidence that make product behavior repeatable, observable, and measurable. You are part of the Sensing Platform Team and work closely with Embedded Software, FPGA/Firmware, Electronics, Photonics, Architects, Product System Engineering, Product Integration, Verification & Validation, Lifecycle Engineering, application/software teams, and external development partners. The primary ownership of this role is integrated interrogator/HIL system-level testing and release qualification. It complements developer-owned unit and component testing and does not replace independent formal verification, compliance, environmental, or end-to-end application validation performed downstream. Responsibilities • HIL & System-Level Test Development • Own the interrogator/HIL test strategy, system-level regression suite, and embedded software/firmware release qualification approach for the Sensing Platform. • Translate product, software, firmware, and interface requirements into test plans, acceptance criteria, coverage objectives, and automated regression tests. • Design, build, and maintain HIL test setups using representative hardware, simulated or real sensor inputs, and remotely controlled lab equipment. • Develop maintainable Python-based test automation for device control, test orchestration, data capture, analysis, and reporting. • Integrate hardware-based regression testing into CI/CD pipelines, enabling repeatable and largely automated testing of release candidates. • Maintain traceability between requirements, test cases, defects, results, and release evidence. • Release Qualification & Failure Analysis • Qualify embedded software and firmware releases on representative interrogator hardware before downstream V&V, FAT, field, or application validation. • Design and execute system, negative, stress, endurance, fault-injection, restart/recovery, upgrade/rollback, and robustness testing based on product risk. • Analyze logs, system state, performance, timing, communication behavior, and data outputs to identify regressions and integration issues. • Triage failures and support root-cause analysis across software, firmware, FPGA, electron