Senior Security Engineer — Secure-by-Design Go/AWS

Asset Reality Limited; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Asset Reality Limited in London is seeking a senior software engineer who will embed security into every layer of the product. You will ship production Go services and React UI on AWS, working in a small team where security is an intrinsic discipline rather than an afterthought.

You will lead threat modelling, architect secure AWS patterns (IAM, segmentation, secrets management) and drive secure design decisions across features, with incident response and client security support as part of the

Qualifications

• Five+ years as a software engineer with substantial security work.
• Strong backend development experience; Go preferred; able to work in Go.
• Hands-on ownership of cloud security in a production AWS environment.
• Threat modelling as a practiced discipline.
• Practical experience with application security in web apps backed by relational databases.
• Comfort in a small team where you will provide security depth.

Responsibilities

• Contribute to day-to-day product development as a senior engineer: designing, writing, reviewing, and shipping production code in Go and React.
• Own the security dimension of engineering work: lead threat modelling on new features and architectural changes, drive secure design decisions, and review high-risk changes.
• Own and improve the security of our AWS estate: IAM design, network segmentation, secrets management, and data isolation in a multi-tenant system.
• Build security into the development lifecycle: dependency and vulnerability management, CI/CD security controls, static and dynamic analysis, and the tooling that makes the secure path the easy path.
• Design and build product security features where the domain demands them: audit integrity, tamper evidence, access controls, and data isolation.
• Lead the technical side of incident response: detection, investigation, and remediation, and the exercises that keep us ready.
• Support client-facing security work with technical depth: contribute to security questionnaires, due diligence responses, and client assessments where engineering answers are needed.
• Raise the security literacy of the wider team through design reviews, pairing, and pragmatic internal guidance — not policy documents.

Skills

Security engineering

Go backend

AWS security

Threat modelling

Application security

Cloud security

IAM design

Network segmentation

Secrets management

Data isolation

CI/CD security

Vulnerability management

Job description

Asset Reality Limited in London is seeking a senior software engineer who will embed security into every layer of the product. You will ship production Go services and React UI on AWS, working in a small team where security is an intrinsic discipline rather than an afterthought.

You will lead threat modelling, architect secure AWS patterns (IAM, segmentation, secrets management) and drive secure design decisions across features, with incident response and client security support as part of the