Senior Site Reliability Engineer

At UnlikelyAI, we are building the future of AI: one that is reliable, accurate and transparent. Our neurosymbolic technology harnesses the power of LLMs and generative AI, and combines it with classical symbolic technology to produce hallucination-resistant artificial intelligence for high-trust applications.

To support our rapidly increasing commercial momentum, we're looking for an experienced and pragmatic site reliability engineer to join our exceptional team. This role is ideal for someone who has successfully scaled systems from prototype to production and enjoys working in cross-functional teams to champion cloud-native engineering.

We are looking for someone with the experience and expertise to define, and own, our approach to building for reliability and security as first-class citizens. This is a strategically important role for our technology team, as we rapidly approach entering full production in multiple projects.

You'll work on a range of customer-facing and internal infrastructure projects, applying your engineering skills to solve complex reliability and scalability challenges. Your ability to build robust automation, design fault-tolerant systems, and your comfort in navigating ambiguity will be key as we continue to develop and operate advanced reasoning capabilities in software systems at scale.

You'll collaborate closely with a multidisciplinary team of software engineers, research scientists, and language engineers in a highly cross-functional environment. This is a hands-on role with real-world impact, offering the chance to shape both our infrastructure architecture and the reliability standards that enable our technology to reach users seamlessly.

Our ways of working may be different to what you’re used to. We work in a highly dynamic way, rapidly delivering projects in a few weeks. We do not subscribe to many classical Agile working practices, and our teams regularly change to adapt to changing projects and business priorities.

What we’re looking for

We are looking for a Site Reliability Engineer with demonstrable experience running production systems at scale. To thrive in this role, you:

• Excel across the stack with deep expertise in backend development on AWS, strong computer science fundamentals, and fluency in Python;

• Be comfortable taking ownership of complex production systems: architect and maintain AWS services, implement and maintain GitHub CI/CD pipelines, and optimize observability, monitoring, and performance tuning;

• Are a champion for shifting left and developer-driven quality: write testable and maintainable code, advocate for continuous improvement in engineering practices, and empower developers to own reliability from day one;

• Are pragmatic, collaborative, and bring sound judgment to system design, reliability, and scaling challenges;

• Have a bias for action; a natural tendency to take initiative and make decisions

Why Join Us?

We have a world-class team of intelligent, focused, collaborative people. We're ambitious, move fast and have a lot of fun while doing it.

We have a huge vision for the future. This offers a unique opportunity to work on the foundational layers of AI but, unlike many other companies, we're not just scaling LLMs, we're focused on a novel neuro-symbolic approach.

You'll work with our novel and cutting-edge tech. Driving this forward involves solving some exciting challenges, so our team has the freedom to be creative and explore innovative ideas in an environment where our technology is evolving and maturing.

Working at UnlikelyAI

We offer a range of benefits and perks designed to support our team's wellbeing and work-life balance.

• We have a hybrid working arrangement, flexibly balancing working from home and office-based working

• Our office is located in Bloomsbury, approximately a five minute walk to both Tottenham Court Road and Holborn stations

• We provide free team lunches every Tuesday, Wednesday and Thursday

• We schedule a variety of optional social and extra-curricular activities

• We have an annual offsite, usually to an international location, where we can work and socialise in the sun

Equal Opportunities

We are committed to having a truly diverse team where everyone is encouraged to be their authentic selves. We, therefore, do not discriminate in employment based on gender, race, religion, sexual orientation, national origin, political affiliation, disability, age, marital status, medical history, parental status or genetic information. Having a broad mix of people helps us to be the best we can.