Senior back-end engineer to own and re-architect the payment-terminal platform powering restaurant kiosks, currently spanning 40+ integrations across card-present terminals, processors, and cash automation. You will design a modular, pluggable SDK enabling internal and external developers to build integrations against a stable contract, implement new integrations from wire-level protocols (TLV, BMP, APDU, BCD/LLVAR) up through high-level APIs, and establish platform-wide patterns for payment correctness (idempotency, transaction recovery, reconciliation). Role requires 6+ years back-end engineering with strong Java, Spring, OOP, and distributed-systems design; hands-on work with serial (RS-232/USB-serial via jssc) and USB (usb4java) transports, REST/SOAP/webhook integrations, and PCI-DSS compliance patterns.
Software Gigs
Senior embedded software engineer role developing mission-critical firmware for Amazon's Leo satellite constellation. Responsibilities include architecting ASIC firmware, RF communication subsystems, secure boot operations, real-time embedded software, and hardware interfaces using protocols like I2C, SPI, UART, and Ethernet. The role requires security-by-design principles, threat modeling, secure coding practices, and collaboration with hardware architects and systems engineers to bring custom silicon from concept through secure bring-up and production integration.
Develop bare-metal firmware and low-level device drivers for Qualcomm reference platforms, focusing on hardware bring-up, validation, and early platform enablement. Work directly with hardware and silicon teams to debug SoC peripherals, implement test firmware, and resolve hardware/software integration issues using lab instrumentation and debug tools. Design and maintain register-level software for a wide range of integrated peripherals including memory, displays, cameras, RF transceivers, and communication interfaces. Requires deep expertise in embedded systems, processor architectures, and hardware protocols with strong problem-solving and cross-functional collaboration skills.