Product Reliability Engineer

Job DescriptionProduct Reliability Engineer (Hardware, Software & Systems) Location: London (Hybrid, 3–4 days on-site)Salary: Competitive + Equity + Benefits A stealth-mode technology start-up, recently founded by a highly experienced team of engineers and entrepreneurs with a track record of building successful ventures, is seeking a Product Reliability Engineer to join its growing engineering function. Backed by substantial private investment, the company is developing next-generation connected products that merge advanced hardware, edge AI, and cloud intelligence. This is a unique opportunity to join at the ground floor of a fast-moving, well-funded business with an ambitious product roadmap and a culture of curiosity, experimentation, and technical excellence. The Opportunity You’ll sit at the intersection of hardware, software, and systems, ensuring that the products you help build perform flawlessly in the real world. From designing hands-on test rigs to developing automated test processes, you’ll play a critical role in validating and improving performance, reliability, and robustness across all product components. You’ll work closely with a small, high-performing engineering team—covering hardware, firmware, and cloud systems—where your insights and ideas will have immediate impact. This is a hands-on, collaborative environment where initiative, curiosity, and attention to detail are key. What You’ll Be DoingDesigning and executing system-level tests across power, connectivity (cellular, Wi-Fi, GPS), audio/video performance, and environmental conditions.Building and maintaining hardware-in-the-loop test rigs using platforms such as Raspberry Pi, Arduino, or similar.Developing lightweight automation in Python, Bash, or Go to scale and streamline testing workflows.Simulating real-world conditions (signal variation, temperature, motion) to uncover intermittent or long-term reliability issues.Collaborating with engineers across multiple disciplines to resolve root causes and improve system resilience.Embedding testability and reliability thinking early in the design process.Helping establish a robust, data-driven testing culture as the product and team scale.What We’re Looking ForA solid grounding in Product Reliability Engineering or test (through academic study or hands-on project experience).Practical experience testing hardware/software systems, embedded devices, or IoT products.Confidence building simple test fixtures or rigs (e.g. Raspberry Pi, Arduino, sensors).Scripting or automation skills – Python preferred – with a drive to improve and scale manual processes.A methodical, inquisitive approach to understanding how things work (and how they fail).Bonus points for experience with video/audio systems, networking, or power and thermal testing.A collaborative mindset and clear communication style.You don’t need to tick every box — enthusiasm, curiosity, and initiative are just as important as experience. What’s on OfferCompetitive salary and equity participation.Private healthcare and benefits package.The chance to influence product direction from day one.A high-trust, low-ego engineering culture focused on learning, growth, and innovation.Hybrid working: primarily in-person in London (3–4 days/week) to enable close collaboration.Why This Role This is a rare opportunity to join a deeply experienced founding team in the early stages of a technically ambitious venture. You’ll work on cutting-edge technology that bridges hardware and AI-driven software, gain exposure to full product lifecycle development, and play a key part in shaping both the product and the engineering culture as the company scales. If you’re a curious engineer who loves understanding how systems behave in the real world — and you want to help build something from the ground up — we’d love to hear from you