Location
London, 2 to 3 days onsite in Kings Cross

Hours
Contract role, immediate start - 12 week contract

Salary
Negotiable

About the Role
AND Digital is on a mission to close the world's tech skills gap by combining human expertise, emerging technology and AI to deliver better outcomes, faster. Since 2014, we have partnered with clients to solve complex challenges, build high-performing teams and create lasting capability. We are a team of over 1,300 people across the UK, Europe and the USA, with ambitious plans for continued growth.

We are seeking four Embedded Senior C++ Developers to join an in-house backend engineering team working on a highly regulated, safety-critical medical technology product. You will own a self-contained area of the application, taking work from initial design through to merged, tested and documented code. Areas of focus may include alarms, patient data persistence, device supervision and start-up, session management or service functionality.

You will work closely with the Software Architect and engineers responsible for surrounding components, taking ownership of delivery within your area. This role is ideal for an experienced Embedded C++ Engineer with a background in Linux-based safety-critical, mission-critical or highly regulated products, comfortable working with formal quality processes, static analysis, code coverage and rigorous testing requirements.

Key Responsibilities Include:
- Developing technical alarm conditions based on hardware and OS telemetry, including battery, temperature, clock, power faults and telemetry quality
- Implementing patient sensor, signal quality and external monitoring alarms with hardware alarm interfaces
- Building robust fault handling and recovery mechanisms
- Developing power-on checks, fail-safe states, fault management and system supervision
- Supporting interrupted-session detection, recovery, logging, audit logging and log rotation
- Developing storage interfaces with atomic and checksummed writes, patient-data packaging, queueing, flushing, retention and retrieval
- Managing session lifecycles, power-button handling, controlled power-down and USB data export
- Supporting software updates, confirmation, rollback, log extraction and audit logging

This role offers the opportunity to work with cutting-edge embedded technologies in a highly regulated environment, contributing to products that impact patient safety and care.

Experience
- Strong experience developing modern C++17 applications on embedded Linux
- Deep understanding of RAII, fixed-width types, std::atomic, multithreading and lock-free or bounded queues
- Proven experience developing software where deterministic behaviour and reliability are critical
- Experience with allocation-free or low-allocation runtime environments, including pre-allocated memory and fixed-capacity containers
- Familiarity with ports-and-adapters / hexagonal architecture, interfaces and dependency injection
- Strong Linux systems integration experience including services, watchdogs and system-level fault management
- Experience with IPC and serialization technologies such as FlatBuffers, Unix-domain sockets or named pipes
- Proficiency with CMake, automated testing and CI/CD pipelines
- Experience with cross-compilation, ideally for aarch64 platforms
- Strong experience with unit testing, code coverage and quality gates
- Comfortable working within formal engineering processes including peer review, traceable changes and documented design decisions
- Experience working on safety-critical, mission-critical or highly regulated software

Desirable Experience
- Experience developing medical devices or other safety-critical systems
- Knowledge of IEC 62304, ISO 13485 or similar regulated software development standards
- Experience with medical alarm systems or other alarm and fault-management systems
- Understanding of IEC 60601-1-8 or equivalent safety standards
- Experience with state-machine-driven supervisors and fault-management systems
- Experience with NVIDIA Jetson, CUDA or GPU-accelerated processing
- Experience with Yocto and embedded Linux board-support packages
- Familiarity with systemd, sd_notify, D-Bus and journald
- Experience with OpenSSL, TensorRT or similar external technologies
- Experience using Docker for development environments
- Experience with GoogleTest, behaviour-driven testing or Gherkin
- Python experience for tooling and deployment scripts
- Experience contributing to software FMEA activities and implementing risk controls

About You
You are an experienced Embedded C++ Developer passionate about building reliable, safety-critical software. You thrive in regulated environments and are committed to high-quality engineering practices. You enjoy collaborating closely with architects and engineers to deliver robust, well-tested solutions. You are proactive, detail-oriented and eager to contribute to impactful medical technology products.

Qualifications
No specific formal qualifications are mandated, but demonstrable experience in embedded C++ development, safety-critical systems and regulated environments is essential.