Lead Security Engineer

Fuse Energy; London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Fuse Energy is searching for a Senior Security Engineer to lead their security strategy and protect core infrastructure and data as they expand. This essential position involves designing secure architectures, managing risks associated with digital transactions, and fostering a security-first culture across teams. Ideal candidates should possess a strong background in security protocols, risk management and experience with AWS security. Competitive salary, a stock option sign-on bonus, and various employee benefits are part of the package.

Benefits

Competitive salary with stock options

Biannual bonus scheme

Fully expensed tech

Paid annual leave

Breakfast and dinner provided for office staff

Qualifications

• Proven experience as a Security Engineer or in a similar role.
• Strong understanding of authentication and authorization.

Responsibilities

• Design and implement secure infrastructure across various environments.
• Conduct threat modelling and risk assessments to secure sensitive operations.
• Lead response to advanced threats and incidents.

Skills

Security protocols

Cryptography

Risk assessment

Analytical skills

Problem-solving skills

AWS cloud security

Education

Bachelor's degree in Computer Science or related field

Job description

At Fuse, we're building a fully integrated energy company, from developing solar, wind, and hydrogen to power trading & distributed energy installations. We sell directly to energy consumers, cutting out the middleman to reduce costs and pass on savings to customers.

But we’re not stopping there.
We’re also building the Energy Network: a decentralised network of smart devices where users get rewarded in Energy Dollars for electrifying their homes, shifting usage to off-peak hours, and helping balance the grid. The energy network helps the grid achieve energy stability, a crucial requirement for growth of AI data centers and energy intensive industries.

We are looking for a seasoned and proactive Senior Security Engineer to help lead our security strategy. This role is crucial to protecting our core infrastructure, applications, and sensitive data as we continue to scale. The ideal candidate brings deep security expertise and thrives in fast-paced, product-focused environments.

You will play a critical role in shaping secure architecture, implementing scalable protection mechanisms, and driving a security-first culture across the company.

Key Responsibilities

• Security Architecture & Design
• Design and implement secure infrastructure across cloud, web, and distributed application environments.
• Provide architectural guidance for cryptographic key management, signing workflows, and secure APIs.
• Evaluate and enhance security of components related to digital asset management, identity systems, or transaction flows.
• Risk Management & Threat Modelling
• Conduct comprehensive threat modelling and risk assessments, especially around distributed or high-value transaction systems.
• Define controls for securing sensitive operations such as wallet integrations, off-chain/on-chain data flows, and internal tooling.
• Develop and manage internal threat intelligence processes to proactively identify and mitigate emerging risks.
• Security Operations & Incident Response
• Lead response to advanced threats and incidents, including analysis, containment, and remediation.
• Build and optimise detection mechanisms and playbooks for novel attack vectors, including abuse prevention and fraud detection.
• Governance, Compliance & Best Practices
• Help define internal standards for security development practices, secrets management, and infrastructure hardening.
• Maintain compliance with relevant frameworks (e.g., SOC 2, ISO 27001, GDPR), and support any industry-specific due diligence.

• Cross-Functional Collaboration

• Partner with engineering, product, and infrastructure teams to embed security best practices into all stages of development.
• Provide guidance on secure system design, especially in areas involving sensitive financial, identity, or cryptographic components.

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or related field.
• Proven experience as a Security Engineer or in a similar role.
• Strong understanding of security protocols, cryptography, authentication, and authorisation.
• Familiarity with securing systems that involve digital transactions, cryptographic operations, or high-privilege user actions.
• Knowledge of operating systems, network protocols, and software development security.
• Experience with AWS cloud security.
• Excellent analytical and problem-solving skills.

• Competitive salary and a stock options sign-on bonus

• Biannual bonus scheme
• Fully expensed tech to match your needs!
• Paid annual leave
• Breakfast and dinner for office based employees