Overview
We’re hiring a Senior Firmware Engineer (Security‑Focused) to join Flex’s engineering team supporting Xylem/Sensus, a global leader in smart metering technologies for water and energy. Responsibilities
Design and implement embedded security protocols (RSA, ECC, AES, Secure Boot, firmware signing, etc.) Enable and integrate hardware cryptographic accelerators Ensure compliance with security standards such as NIST, FIPS, ISO/IEC 27001 Collaborate with cross‑functional teams to define secure system architectures Conduct code reviews, threat modeling, and validation for security‑critical code Support the full firmware development lifecycle from requirements to testing and deployment Qualifications
Bachelor’s degree in Electronics, Embedded Systems,



Computer Engineering or related field 5+ years of experience in embedded firmware development using C (bare metal or RTOS) Strong knowledge of public‑key cryptography and secure protocols (TLS/DTLS) Experience with secure microcontrollers/So Cs (e.g. ARM Trust Zone, ATECC) Familiarity with firmware validation, debugging tools, and version control systems Bonus: Experience with secure OTA updates, device authentication, and anti‑tampering mechanisms Benefits
Mission‑critical project with integral impact in smart infrastructure Collaborate with highly skilled and innovative engineers Professional and supportive environment Opportunities for continuous learning in embedded security and Io T Seniority Level
Senior

📌 Senior firmware engineer (Ejido de la Finca)
🏢 Xylem
📍 Ejido de la Finca