Principal Security Engineer

Block
San Francisco
Workplace: RemoteFull timeUSD 319,000 - 478,600 annuallyFunction: CybersecurityExperience: 10+ yearsSkills: ["Technical leadership","Decision-making","Collaboration","Communication","Mentorship"]

Lead security excellence for Block’s software products by setting a multi-year software security strategy and shaping architecture decisions. Partner with Engineering and InfoSec to drive a “Secure by Design” culture, deliver high-leverage security solutions, and improve resilience of security services through SecRelEng practices. Provide threat modeling and security architecture review, mentor engineers, and guide execution for critical systems including tokenization platforms and mobile platforms.

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Block
Block
2 months ago

Principal Security Engineer

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Source: Company careers pageValidated by: Fursa AI
Last checked: 22 hours agoStatus: Live

Job Summary

Lead security excellence for Block’s software products by setting a multi-year software security strategy and shaping architecture decisions. Partner with Engineering and InfoSec to drive a “Secure by Design” culture, deliver high-leverage security solutions, and improve resilience of security services through SecRelEng practices. Provide threat modeling and security architecture review, mentor engineers, and guide execution for critical systems including tokenization platforms and mobile platforms.
Location: San Francisco
Workplace: Remote
Employment Type: Full time
Job Function: Cybersecurity
Seniority: Sr. Manager level

Key Responsibilities

  • •Set the multi-year technical strategy for software security and guide architectural decisions aligned with engineering best practices.
  • •Deliver and scale innovative software security solutions addressing key risks like technology fragmentation and security after-the-fact.
  • •Lead cross-cutting security solution development and implementation across business units to reduce data sprawl and overpermissioning.
  • •Drive security engineering excellence for critical systems (e.g., tokenization platforms) and mobile platforms across the product ecosystem.
  • •Integrate security early via Secure SDLC, perform security architecture reviews and threat modeling, and mentor InfoSec engineers.

Pay and Benefits

Salary: USD 319,000 - 478,600 annually
Perks:Health InsuranceRemote WorkFlexible TimeRetirement SavingsFamily Planning

Key Requirements

  • •10+ years developing and shipping production software and critical services, including at least 5 years establishing and scaling security practices in a large, modern environment.
  • •Track record of exemplary technical leadership and decision-making at a Principal or equivalent level (L8+ capabilities preferred).
  • •Mastery of system design and architecture, with experience structuring ambiguous, domain-heavy problems to drive clarity among stakeholders.
  • •Deep understanding of security vulnerabilities, risks, countermeasures, and compensating controls for high-volume, real-time transaction processing environments.
  • •Ability to write production-quality code/scripts for security automation and tooling.
Experience:10+ yearsSoftware securityFintechPaymentsCryptocurrencyBitcoinSecurity automationReal-time transaction processing
Skills:Technical leadershipDecision-makingCollaborationCommunicationMentorship
Languages:English

Company Brief

Block
Builds financial services and commerce tools to empower businesses and individuals, operating products such as Square, Cash App, Spiral (Bitcoin initiatives), TIDAL, and developer-focused payment and banking solutions.
Industry: Fintech Infrastructure
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Francisco, United States
Founded: 2009
WebsiteLinkedIn