Director, Senior Security Architect
Possible
Sponsorship likelihood
This employer issued few or no visas recently
Not disclosed
Salary
Not disclosed by employer
£48,500
Going rate
Skilled Worker going rate
This role likely qualifies for a Skilled Worker visa
SOC 2135 (85% match) is an eligible occupation, with a going rate of £48,500, and BULLISH UK SERVICES LTD is a licensed sponsor. That is our reading of the rules. Whether they issue a Certificate of Sponsorship is still their call.
This could also be SOC 1137 (Information technology directors, Director title and leadership could indicate IT director role). We read the code off the advert, so it is our best guess, not the employer's.
New graduate or PhD holder? Pick one of the lower rates.
What each route needs for this job
| Occupation code | New entrant 70% of going rate | STEM PhD 80% of going rate | Relevant PhD 90% of going rate | Standard rate 100% of going rate |
|---|---|---|---|---|
2135 Cyber security professionals Most likely code | £34,000 | £38,800 | £43,700 | £48,500 |
1137 Information technology directors Also possible | £60,200 | £68,800 | £77,400 | £86,000 |
We use the lowest threshold across the plausible codes. Likelihood is Possible at most when the pay clears only a lower rate, or only under a less likely code. How the Home Office picks the code
About the role
About Bullish
Bullish is an institutionally focused global digital asset platform that provides market infrastructure and information services. These include: Bullish Exchange – a regulated and institutionally focused digital assets spot and derivatives exchange, integrating a high-performance central limit order book matching engine with automated market making to provide deep and predictable liquidity. Bullish Exchange is regulated in Germany, Hong Kong, and Gibraltar. CoinDesk Indices – a collection of tradable proprietary and single-asset benchmarks and indices that track the performance of digital assets for global institutions in the digital assets and traditional finance industries. CoinDesk Data - a broad suite of digital assets market data and analytics, providing real-time insights into prices, trends, and market dynamics. CoinDesk Insights – a digital asset media and events provider and operator of Coindesk.com, a digital media platform that covers news and insights about digital assets, the underlying markets, policy, and blockchain technology.
Reports to:
CISO AmericasPosition Overview
At Bullish, security is not a checkpoint, it is the foundation of trust that lets people move billions across our markets with confidence. The Bullish Security Architecture team secures Bullish Global, including the Bullish Exchange, Bullish Liquidity Services, CoinDesk Indices, CoinDesk Data, CoinDesk Media, and CoinDesk Events, designing the defenses that keep our mission-critical trading systems and other business lines resilient against the most capable adversaries in the world.
As a senior member on this team, you will sit at the intersection of cutting-edge engineering and high-stakes finance, shaping how secure software is built across web, API, mobile, and FIX platforms, and pushing our security bar beyond industry-leading. This is a senior technical leadership role, a hands-on application and cloud security architect who leads through influence, deep expertise, and mentorship.
If you thrive on solving complex technical challenges in a fast-moving crypto landscape and building first-of-their-kind systems, this is where you will do the most impactful work of your career.
This position is based in SoHo London and will be required to work full-time onsite.
Responsibilities:
Build complex threat models for critical systems and establish industry-leading cybersecurity requirements to turn ambiguity into clear, prioritized defenses.
Partner closely with Product, Engineering, and Infrastructure teams to design and ship secure software across web, API, mobile, FIX, and trading platforms.
Lead complex global security initiatives, build custom AI-powered tooling to maximize efficiency and scale the cybersecurity program.
Assess vulnerability risks, deliver actionable recommendations across all technical levels, and track health metrics and KPIs for executive reporting.
Drive high-impact projects and adapt to evolving business needs within a dynamic, fast-paced environment.
Provide technical leadership and mentorship to the cybersecurity and engineering teams.
Experience & Qualifications:
10+ years in cybersecurity, including 5+ years of hands-on coding, alongside deep expertise in threat modeling, pen testing, code reviews, and offensive security methodologies.
Strong foundation in network protocols (IP, DNS, HTTP, SSL/TLS), cryptography (PKI, encryption at rest/in motion), Linux environments, and public cloud platforms (AWS, Azure, or GCP).
Proficient in programming languages like C/C++, Java, JS, Python, Go, or Rust
Possess a deep understanding of common vulnerability frameworks (OWASP Top 10, SANS CWE Top 25).
Solid grasp of enterprise software development, Agile, CI/CD pipelines, and security tooling (SAST, DAST, OSA, Vulnerability Management, API traceability).
Excellent ability to convey complex technical risks to non-technical executives and engineers and build strong cross-functional partnerships.
A strong individual contributor with ability to drive projects independently from conception to complete with minimal oversight.
Nice to Have:
A restless drive to secure systems and continuously learn new technologies.
Experience securing trading, financial-market, or other regulated, high-stakes systems.
Relevant certifications, such as security architecture certifications (e.g. SABSA, TOGAF), offensive security (e.g. OSCP, OSCE, SANS, CREST) and cloud security specialty certifications (AWS, Azure, or GCP).
Bullish is proud to be an equal opportunity employer. We are fast evolving and striving towards being a globally-diverse community. With integrity at our core, our success is driven by a talented team of individuals and the different perspectives they are encouraged to bring to work every day.
This description is the source posting as it read when we added it. We are not affiliated with BULLISH UK SERVICES LTD, so check their own site for the current details.
Where this offer sits in the market
Cyber security professionals (SOC 2135) · UK · ONS ASHE 2025 · basic pay · ~30k in sample- Middle half £43,680–69,316
- Median £51,376
- Going rate £48,500
- Threshold £41,700
- New entrant £34,000–43,700
Similar sponsored roles
See all UK visa jobsNo close matches live right now.
Browse more sponsored jobs at BULLISH UK SERVICES LTDAbout sponsorship for this role
Does this job guarantee visa sponsorship?
Not necessarily. BULLISH UK SERVICES LTD holds a sponsor licence, but sponsorship for a specific hire is always the employer's decision. Be upfront in your application that you'll require it.
What salary is needed for this role to be eligible?
The offer must clear both the general threshold and the SOC 2135 going rate of £48,500. New-entrant and shortage discounts can lower it.