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Principal Software Engineer
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Principal Software Engineer
Staff Software Engineer - Security
£120,000 - £135,000 | UK / Ireland Based - Fully Remote
This role is unlike most security engineering positions—you won’t just be bolting on scanning tools; you’ll be building the trusted security layer the software industry depends on.
We’re hiring for a $100M-backed security startup that provides a fully managed, multi-tenant service trusted by multi-language, container, and OS ecosystems to secure and deploy software at Fortune 500 scale.
What You’ll Work On
You’ll construct and maintain the core security infrastructure that provides:
- Fast, reliable pipeline processing of industry-standard security feeds
- Real-time policy enforcement and visibility for global-scale shipping workflows
Specifically, your responsibilities include:
- Designing and shipping key security features for:
- The enterprise management platform
- Underlying high-performance APIs
- Integrating and maintaining security data feeds (vulnerability databases, vulnerability intelligence, and threat feed input)
- Collaborating with product, design, and customer success to tackle hard supply chain security challenges
- Ensuring end-to-end product quality with rigorous testing, monitoring, and sustainable engineering practices at scale
- Measuring impact on customer value, not just ticket velocity
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The team delivers multiple releases per day with focus on automation, observability, and incrementally eliminating systemic reliability friction.
You Bring
12+ years of production experience building and operating complex distributed systems, with hands-on expertise in:
- Primary skill stack: Python (Django) or Go; Rust is a strong plus
- DevOps & Cloud Infrastructure:
- Deep operational understanding of AWS (Lambda, ECS, Postgres, ClickHouse, S3, Kinesis/Kafka)
- Experience with infrastructure provisioning (Terraform)
- Familiarity with container runtimes (e.g., Kubernetes, containerd) and CI/CD pipelines
- Security & Compliance:
- Broad knowledge of supply chain security, SBOMs, policy-as-code, or vulnerability scanning
- Background in enforcing automated security checks
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You also embody these traits:
✔ A collaborative mindset with strong teamwork skills ✔ Low ego, high functionality—prefers shipping quickly and iterating constantly ✔ Commitment to reliability, traceability, and robust observability at scale
You’ll Enjoy
- Total Remuneration: £150,000 - £160,000 + sizable equity stake
- Benefits:
- Private healthcare
- Pension contributions (with 8% company match)
- Generous PTO and flexible, family-friendly policies
- Dedicated professional development budget (conferences, training, certifications)
- Culture & Growth:
- Opportunity to shape a hypergrowth startup from within
- Regular all-hands offsites and a collaborative team environment
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