Security Engineer, Institutional Trading

Blockchain.com; Greater London; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Unlimited vacation policy

Equity in Blockchain.com

ClassPass

Remote work for up to 20 days per year

Job summary

Blockchain.com is seeking a Security Engineer for the Institutional Trading and Financial Operations team. This role requires 5+ years in security engineering, focusing on the secure operation of trading processes. Responsibilities include assessing vulnerabilities, managing security signals, and providing insights for C-suite stakeholders. The position is based in London with a mandatory in-office presence four days a week and includes remote work options, unlimited vacation, and meaningful equity.

Qualifications

• 5+ years in security engineering, platform security, or application security experience.
• Proven expertise in Threat Modeling.
• Experience with observability and detection tooling.

Responsibilities

• Partner with teams to map trading systems and workflows.
• Conduct assessments to identify structural vulnerabilities.
• Act as a primary security liaison for management and vendors.
• Implement monitoring for security signals.
• Support secrets and key-management hygiene.
• Assist product security in triaging findings.
• Document controls and risk summaries.

Skills

Threat Modeling

Security Engineering

Observability tools

Secrets management

Pull Request auditing

Tools

SIEM

KMS

HSM

Vault

Job description

Blockchain is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011, Blockchain has earned the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.

You’ll be the hands-on security engineer embedded with the Institutional Trading and Financial Operations (FinOps) team. Your focus is the secure operation of off-chain trading processes and infrastructure that empowers our institutional business: integrations, signing flows, key custody interfaces, middle-office workflows, order routing and settle pipelines that handle significant capital. You will support risk assessments, operating controls, automation to detect operational anomalies and remediation coordination. This is a high-visibility role where you will focus on operational security engineering - ensuring that the tools and processes our traders use are resilient against both external threats and internal errors. This role does not require smart-contract auditing.

WHAT YOU WILL DO

• Partner with Trading, Middle Office and Quant (Institutional FinOps) teams to map out inventory trading systems, data flows, third-party integrations and custody/settlement touchpoints.
• Conduct deep-dive assessments mapping critical assets and workflows to identify structural vulnerabilities. You will be responsible for defining the Target State and drafting the strategic Risk Treatment Plans (RTP) required to meet institutional-grade standards (e.g., CCSS, NIST, DORA).
• Act as the primary security liaison for Senior Management and third-party vendors. You will translate complex technical gaps into actionable business risk summaries, drive vendor evaluations for core security infrastructure, and manage the project lifecycle for high-impact posture uplifts.
• Implement and maintain monitoring for FinOps-specific security signals such as abnormal order patterns, signature misuse, unusual settlements. You will integrate these signals into our SIEM/SOAR for real-time response.
• Support secrets and key‑management hygiene. You will ensure app/service keys are stored in KMS/Vault, scoped to least privilege and rotated automatically to prevent credential leakage.
• Assist product security in triage of SAST/SCA findings for FinOps-related repositories. You will help implement CI checks and remediation playbooks.
• Participate in incident exercises, post‑incident reviews and remediation tracking for trading incidents.
• Document controls and produce concise risk summaries for FinOps leads and the Security.

WHAT YOU WILL NEED

• 5+ years in security engineering, platform security, or application security experience.
• Proven expertise in Threat Modeling. Ability to perform structured reviews (e.g., STRIDE) of complex data flows and operational processes.
• Experience with observability and detection tooling (SIEM, logs, metrics) and ability to write basic detection rules.
• Practical experience with KMS/HSM, secrets management platforms (Vault, 1Password, AWS/GCP KMS), IAM patterns and least‑privilege.
• Exceptional ability to translate "Technical Debt" into Business Risk for C‑suite stakeholders (CFO, CTO, Head of Trading).
• Ability to raise, read and audit Pull Requests in at least one language used in our stack (TypeScript, Java/Kotlin, Python).
• Experience conducting technical due diligence and scoping for third‑party security integrations.

NICE TO HAVE

• Familiarity with trading systems or financial operations (market‑making, execution, settlement) or close collaboration background with trading/quant teams.
• Exposure to blockchain on‑chain concepts (wallets, addresses, transactions) but no requirement to audit contracts.
• Familiarity with SOC operations, and post‑incident forensic analysis.
• Familiarity with SOC2, ISO 27001, or financial audit requirements.
• Any relevant industry certification.

COMPENSATION & PERKS

• Full‑time salary based on experience and meaningful equity in an industry‑leading company.
• This is a role based in our London office, with a mandatory in‑office presence four days per week.
• Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year.
• ClassPass.
• Unlimited vacation policy; work hard and take time when you need it.
• The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field.

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time.