Staff Software Engineer - Security
This listing is for a Staff Software Engineer - Security role at Flow Engineering, in London, United Kingdom. The listing describes it as a full-time, staff/principal-level position.
DGJ summary of this job
Our own short read of this listing, built only from the facts it gives. The employer’s original text follows further down.
This listing is for a Staff Software Engineer - Security role at Flow Engineering, in London, United Kingdom. The listing describes it as a full-time, staff/principal-level position.
The advert mentions Python, TypeScript, Node.js, AWS, Azure, GCP, LLM and observability among the skills and tools for this role.
The employer does not state a salary in this listing; DGJ Insight below shows an official pay benchmark for the place where one exists.
Visa sponsorship is not mentioned. Applicants from outside United Kingdom should check the official work permit route before applying.
Dev Global Jobs found this job on Arbeitnow on Nov 6, 2026.
- Employer
- Flow Engineering
- Location
- London, United Kingdom
- Job type
- Full-time
- Level (from the title)
- staff/principal-level
- Pay
- Not stated by the employer
- Found
- Nov 6, 2026 on Arbeitnow
- Employer text
- 438 words, about 2 min to read
- Apply only on the official page (arbeitnow.co.uk). Dev Global Jobs is not the employer and never asks for a fee.
- Mirror the skills the advert names (Python, TypeScript, Node.js and AWS) in your CV where you really have them; applicant tracking systems look for these words.
- Read the employer’s full text below (about 2 min) before you apply.
- Build or check your CV with the free DGJ CV Builder.
DGJ Insight
Our own data about this role and place, from official statistics and our live job index.
Source: OECD Average annual wages, 2025
UN living-cost index for United Kingdom (ICSC post adjustment 76.4), as of 1 Oct 2026.
Source: ICSC post adjustment classifications (icsc.un.org)
- Skilled Worker visa: Job offer from a licensed sponsor at the required skill and salary level; English requirement
- Health and Care Worker visa: Eligible health and social care roles with a licensed sponsor
- Global Talent visa: Endorsement as a leader or potential leader in a listed field
Official routes: UK Visas and Immigration (GOV.UK)
About the role
Full text from the employer, as published on Arbeitnow, arranged into sections. Nothing added or removed.
01About Flow
Flow Engineering is an AI-native requirements platform for modern engineering organizations, enabling hardware teams to collaborate with AI agents to design, validate, and evolve complex systems with speed and rigor.
02About the role
Our customers in defense, aerospace and more trust us with sensitive systems requirements. That means security is a first-order part of the product, so we’re looking for a Staff Software Engineer to own it.
This is our first dedicated security hire, so you'll define the security architecture, harden the platform, and build out the compliance posture. Since LLMs and agentic workflows sit at the center of what we do, you'll also lead how we secure them.
03What you'll do
Own security architecture across the platform: threat modeling, secure design reviews, and the standards we build against.
Harden the full stack, from application security to cloud infrastructure (identity, network, secrets), tenant isolation, and data protection.
Drive SOC 2 and get us ready for the certifications defense and aerospace customers ask about, including export control and ITAR.
Secure our AI and agentic systems: prompt injection, data leaking through models, what actions agents are allowed to take, and guardrails.
Build the security tooling we need across detection, monitoring, vulnerability management, and CI/CD.
Stand up incident response and run it, from detection through postmortems.
Work with sales and product to get through security reviews and win customer confidence.
04About you
8+ years building production software, including running secure services at scale in the cloud.
Deep experience in application and cloud security (AWS, GCP, or Azure): identity and access, secrets, network security, data protection.
You've owned security in a regulated or high-trust environment and have implemented SOC 2 yourself. Export control, ITAR, or FedRAMP experience is a big plus.
Solid on threat modeling, secure architecture, and incident response.
You've secured AI or LLM systems.
You're comfortable being the security lead at a startup and setting the agenda yourself.
05Our stack (AI-leaning)
TypeScript/Node.js and Python for AI and backend services.
Modern LLM APIs and orchestration libraries for building agentic workflows.
Postgres and other managed cloud services for data and state.
06How we work & values
Speed over everything: prototype AI workflows quickly, then harden what works.
Own, downscope, ship, iterate: one clear owner per feature, from prototype to production.
Fundamentals done well: evaluation, observability, and safety are part of the first version, not an afterthought.
Competitive salary and meaningful equity.
Health, dental, and vision coverage.
Flexible time off and support for experimentation, learning, and staying current with the AI ecosystem.
Compensation: £160K, £230K • Offers Equity
- • £160K, £230K • Offers Equity
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