Senior Security Engineer

Job Description

Our mission is to make clean power accessible. We are passionate about making a positive impact on communities and the environment where we work.

We're designing, financing, building and operating the world's most sophisticated battery systems to enable the take up of more renewable power, electrifying fleets for cleaner air, and providing clean, portable power including repurposed electric vehicle batteries. Our proprietary software and data analysis optimises operational performance for our customers to reduce emissions and costs.

Since we began in 2017, we've raised over £2.7 billion in debt and equity funding and transformed it into >1.2GW of grid-connected batteries live or under contract and c.3,400 electric vehicles supported. We have operations in the UK, Europe, Australia, New Zealand, and the US and Canada, with a global headquarters in London.

We're the leading owner and operator of battery storage in the UK, supporting the National Grid with the uptake of renewable power. We also work with c.90% of the UK's major bus companies, powering 25% of the UK e-bus market. We're also the number one owner and operator of e-buses in Australia and New Zealand, and are quickly expanding into light commercial vehicles and trucks. Our rapidly growing company is looking for highly talented and motivated people to join us.

The Opportunity

As our company scales, we are maturing our technology operations and shifting towards a proactive, 'secure-by-design' culture. We are seeking a highly skilled, hands-on Security Engineer to join as our first dedicated technical security hire. Reporting directly to the CISO, you will bridge the gap between security strategy and software engineering, ensuring that our products and infrastructure are secure from the ground up.

Because you will be the pioneering member of our hands-on security team, a background in software engineering is highly preferred. You will act as the tactical expert, writing code to automate security guardrails, integrating security into our CI/CD pipelines, and establishing the technical security baseline for the business.

A Taste of the Day to Day

• Design and implement security solutions to protect systems, networks, and data from cyber threats across our cloud and application ecosystem.
• Embed Security into Workflows (DevSecOps): Work directly with engineering teams to integrate automated security scanning (SAST, DAST, SCA) and validation into CI/CD pipelines.
• Cloud Infrastructure Security: Implement security controls as code (Infrastructure as Code) to ensure our AWS environment is secure by default, including container hardening and network security groups.
• Network & Web Security: Manage and optimize our Cloudflare implementation, including WAF, Zero Trust, and CDN tooling to protect our web applications.
• Vulnerability Management & Incident Response: Monitor security systems, act as the primary responder for security incidents, and conduct regular security assessments, threat modeling, and code reviews.
• Champion Security Culture: Act as a security consultant and mentor to software engineers, promoting secure coding practices and fostering a culture of technical excellence.
• Manage External Testing: Coordinate and assist in running penetration testing, bug bounty programs, and red teaming exercises.

Health and Safety

• Actively contribute to Zenobe's commitment to health and safety, wellbeing and sustainability by; integrating these principles into daily responsibilities, ensuring a safe and supportive work environment, promoting both the physical and mental health of self and colleagues, and adopting sustainable and energy-efficient practices to minimize environmental impact. By doing so, each employee at Zenobe plays a vital role in fostering a culture that prioritises overall safety, holistic wellbeing, environmental sustainability in our business operations.

What We're Looking For

We realise that certain groups of people are less likely to apply for a role if they don't meet 100% of the job requirements. To be absolutely clear: if you like the look of this job and think you could do it well, we encourage you to apply with a CV that highlights your transferable skills and experience. Above all, Zenobē is looking for collaborative, flexible, empathetic people who are interested in creating and promoting practical routes to a zero carbon world.

• Proven hands-on experience as a Security Engineer, DevSecOps Engineer, or similar technical security role.
• Strong background in Software Engineering, with proficiency in programming/scripting languages to build automation and understand complex codebases. (Familiarity with Angular is highly beneficial as it is used within our estate).
• Extensive hands-on experience securing AWS cloud environments.
• Proven experience implementing, configuring, and managing Cloudflare (WAF, CDN, Bot Management).
• Deep understanding of modern engineering practices, Infrastructure as Code (IaC) mindsets, and CI/CD pipelines.
• Strong analytical and problem-solving skills with a methodical approach to troubleshooting complex security issues.

Working at Zenobe

We're passionate about sustainability and are proud to offer Team Zenobē a pioneering and collaborative working environment. We encourage our people to take ownership of their career progression and celebrate those that can think outside the box.

If you'd like to join our community of likeminded people hit the apply button now, we'd love to hear from you!

What We Offer

Charge your career at Zenobē and receive

• Up to 33% annual bonus for being awesome
• 25 days holiday, increasing with length of service up to 30 days, plus bank holidays
• Private Medical Insurance
• £1,500 training budget per year, to ensure you grow as we do
• EV Salary Sacrifice Scheme
• Pension scheme, up to 8% matched contributions
• Enhanced parental leave
• Cash back health plan
• Plus more

Lots of our people work flexibly in many different ways, including part-time, flexitime and hybrid working. We can't promise to give you exactly what you want, but please talk to us about the flexibility you need and let's see how we can make it work.

Our Approach to Diversity and Inclusion

Our people are our strongest asset and the key determinant of our success, and we value a range of skillsets and perspectives. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. We work to provide equal opportunities and an inclusive work environment, where everyone is fairly treated in the application process and through their career at Zenobē. If there are any adjustments that would help improve your experience with Zenobē, please let us know when you apply.