Staff Engineer - Trust & Vault

Accountabilities • Own the technical architecture and long-term direction of the Trust & Vault domain, covering card vaulting, tokenization, authentication, payment optimization, account updater capabilities, and portfolio migration.

• Design and evolve secure systems for tokenizing, storing, and retrieving sensitive card data within PCI-compliant boundaries.

• Architect and develop authentication capabilities such as 3DS/SCA and network tokenization to strengthen transaction security while minimizing customer friction.

• Build payment optimization capabilities designed to improve authorization and acceptance rates through network tokens, account updater services, and intelligent use of vaulted payment credentials.

• Design and maintain resilient, highly available, low-latency systems suitable for a zero-tolerance-for-failure production environment.

• Establish clear, versioned APIs and event-driven architectures that support scalable and maintainable platform services.

• Champion a full-service ownership culture in which engineering teams design, deploy, monitor, and operate their own microservices in production.

• Ensure systems are designed for multi-tenancy, elastic scaling, automated observability, and strong operational resilience.

• Apply AI-assisted engineering tools across architecture, implementation, testing, and code review while helping establish effective practices for their adoption.

• Partner with Product, senior engineering leaders, and cross-functional technical teams to solve complex problems and remove organizational or technical silos.

• Mentor engineers, influence engineering standards, and raise the technical quality of the wider engineering organization.

• Drive technical initiatives from architecture through production, balancing feature velocity with security, reliability, compliance, and maintainability.

Requirements

• Extensive software engineering experience with deep expertise in Go and/or Kotlin, supported by strong understanding of broader software engineering and full-stack principles.

• Proven track record architecting robust, scalable, and maintainable distributed systems, including event-driven platforms, APIs, and cloud-native or serverless architectures.

• Strong knowledge of software architecture patterns, engineering best practices, and designing systems for high availability and operational resilience.

• Experience building foundational platform capabilities or complex distributed systems, ideally involving payment tokenization, card vaulting, authentication, or PCI-scoped infrastructure.

• Strong hands-on experience with AWS and cloud-native services such as RDS, ECS, EKS, S3, or comparable technologies.

• Excellent automated testing practices across unit, integration, and end-to-end testing within Agile, DevSecOps, and CI/CD environments.

• Proven technical leadership experience, including mentoring engineers, defining technical vision, delivering complex cross-team initiatives, and helping teams improve delivery performance.

• Strong understanding of DORA metrics and experience identifying and removing technical or organizational blockers.

• Demonstrated preference for clean, modular, maintainable architecture and the judgment to balance compliance and reliability requirements against delivery speed.

• Advanced written and spoken English proficiency.

• Expertise in PCI DSS, card vaulting, tokenization, network tokenization, 3DS/SCA, or account updater services is highly advantageous.

• Experience improving payment authorization and acceptance rates through authentication, tokenization, or payment credential lifecycle management is a strong plus.

• Previous experience in payments or fintech, particularly at global scale, is preferred.

• Knowledge of performance optimization and efficient algorithms for high-throughput, low-latency systems is beneficial.

• Familiarity with static analysis and code-quality tools such as SonarQube and mature CI/CD pipelines is advantageous.

• Experience introducing engineering practices, standards, or technical improvements across multiple teams is a plus.

• Open-source contributions or technical writing demonstrating technical leadership are beneficial.

• Spanish proficiency is considered an additional advantage.

• Strong ownership, analytical thinking, communication skills, and the ability to operate effectively in a high-responsibility environment.

Benefits

• Competitive compensation.

• Fully remote working environment with the flexibility to work from anywhere.

• One-time home office allowance.

• Work equipment provided.

• Stock options.

• Health plan available wherever you are.

• Flexible days off.

• Language, professional, and personal development courses.

• Opportunity to work on critical payment infrastructure operating at global scale.

• Exposure to complex challenges across payment security, tokenization, authentication, distributed systems, and cloud infrastructure.

• International, remote-first working environment with experienced technical teams.

• Significant technical ownership and influence over foundational engineering systems.

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