All roles

Open role

[Remote] Principal Security Engineer

Remote · South Africa Full-time

Note: The job is a remote job and is open to candidates in USA. Block is a company focused on economic empowerment, and they are seeking a Principal Security Engineer to lead software security initiatives. The role involves setting technical strategies, driving security innovation, and collaborating with engineering teams to ensure security is integrated into product development.

Responsibilities

  • Deliver world-class and innovative software solutions to security problems, tackling Block's top risks such as technology fragmentation and security after-the-fact
  • Define the multi-year technical strategy for software security at Block, guiding architectural decisions and ensuring alignment with engineering best practices
  • Identify and lead the development and implementation of common, high-leverage security solutions and infrastructure across Block's business units (Square, Cash App, TBD, etc.) to combat data sprawl and overpermissioning
  • Drive engineering excellence, specifically around security, for critical systems like tokenization platforms, ensuring integrity, performance, and scalability
  • Spearhead the security strategy and engineering excellence for mobile software and platforms across Block's product ecosystem
  • Champion security reliability engineering (SecRelEng) practices to improve the overall resilience and availability of security services and infrastructure
  • Lead technical planning and implementation for high-priority security initiatives, acting as a technical decision maker/tie-breaker and upholding high technical standards
  • Partner with engineering leaders to integrate security practices early into the development lifecycle (Secure SDLC) and provide security architecture review and threat modeling for critical systems
  • Foster technical excellence within InfoSec and mentor engineers on technical execution, system design, and technology choices, driving knowledge sharing and documentation

Skills

  • Track record of exemplary technical leadership and decision-making at a Principal or equivalent level (L8+ technical capabilities preferred)
  • 10+ years of experience developing and shipping production software and critical services, with a minimum of 5 years focused on establishing and scaling security practices in a large, modern technology environment
  • Mastery of system design and architecture, with demonstrable experience solving ambiguous, domain-heavy problems by structuring the approach, clarifying scope, and driving clarity among stakeholders
  • Deep technical understanding of security vulnerabilities, risks, countermeasures, and compensating controls, particularly in high-volume, real-time transaction processing environments
  • Exceptional collaboration and communication skills, with proven ability to influence executive leadership and direct engineering teams in prioritizing security roadmap items to balance security and business risks
  • Demonstrable ability to write production-quality code/script for security automation and tooling
  • Experience leading and driving significant technical initiatives across multiple team, organizational and product boundaries
  • Experience in the financial technology, payments, or cryptocurrency/bitcoin domain, reflecting Block's unique security characteristics
  • Experience improving engineering standards and practices for security, and building systems to achieve sub-linear growth of security resources relative to the business (Design for Leverage, Not Coverage)

Benefits

  • Remote work
  • Medical insurance
  • Flexible time off
  • Retirement savings plans
  • Modern family planning

Company Overview

  • Block is a technology company with a focus on financial services. It was founded in 2009, and is headquartered in San Francisco, California, USA, with a workforce of 10001+ employees. Its website is https://block.xyz.
  • Company H1B Sponsorship

  • Block has a track record of offering H1B sponsorships, with 51 in 2026, 257 in 2025, 253 in 2024, 260 in 2023, 297 in 2022. Please note that this does not guarantee sponsorship for this specific role.
  • More open positions

    [Remote] Senior Financial Advisor

    Work from home Full-time role

    [Remote] TikTok Shop Growth Manager

    Work from home Full-time role

    [Remote] Social Media Content Coordinator

    Work from home Full-time role

    [Remote] Manager - Strategy & Technology Management Consultant

    Work from home Full-time role

    [Remote] Sales Compensation Analytics & Systems Specialist

    Work from home Full-time role

    Shoreline mapping scientist (Natural Resource Scientist 2)

    Work from home Full-time role

    Security Systems Designer - 100% Remote

    Work from home Full-time role

    Diagnostic Sales Specialist - Houston North

    Work from home Full-time role

    [Remote] Energy Efficiency Lighting Trade Ally Account Manager (Remote - CT)

    Work from home Full-time role

    Deployed Software Engineer (Senior or Staff)

    Work from home Full-time role

    Freelance Music Producer / Composer Needed for Corporate Jingle

    Work from home Full-time role

    Entry Level Freight Dispatcher – Work from Home – $1,200 to $3,000+/Week (1099)

    Work from home Full-time role

    Patient Safety Program Specialist CO OR

    Work from home Full-time role

    [Remote] Territory Sales Manager

    Work from home Full-time role

    [Remote] Senior Account Executive

    Work from home Full-time role

    Grant Writing Subject Matter Expert (6 Month Contract Role, EST Hours)

    Work from home Full-time role

    Epic Certified Willow Pharmacy Applications Manager 6355647

    Work from home Full-time role

    Customer Support Representative

    Work from home Full-time role

    Remote Customer Service Representative / Answering Service Agent – Earn Up to $17/hr

    Work from home Full-time role

    Licensed Psychologist- Remote

    Work from home Full-time role

    PEP - Jr. Designer, Social Media

    Work from home Full-time role