We’re looking for a Lead Software Engineer with deep expertise in Node.js, MongoDB, and distributed systems, combined with a strong focus on platform stability, scalability, reliability, and long-term technical excellence. You’ll be joining our WhatsApp Platform team, which builds and maintains core capabilities such as WhatsApp messaging (BSP), WhatsApp calling, WhatsApp flows, number provisioning, meta compliance workflows, and platform integrations that power communication for thousands of businesses.

Responsibilities

Stabilize & Scale the Platform: Tackle systemic bottlenecks, improve fault tolerance, and ensure high availability for mission-critical phone services.

Efficiency & Performance: Optimize resource usage (CPU, memory, network) to handle millions of operations while reducing cloud costs.

Tech Debt & Modernization: Lead long-term refactoring efforts, deprecate legacy systems, and introduce scalable patterns.

Security & Compliance: Strengthen data protection, access controls, and auditability across the platform.

Developer Velocity: Improve tooling, observability, and automation to accelerate engineering workflows.

Cross-Team Collaboration: Work with product, infrastructure, and other engineering teams to align on platform priorities.

Mentorship & Leadership: Guide engineers, set architectural standards, and drive the platform roadmap.

Requirements

6+ years of backend engineering experience, including designing fault-tolerant systems and working on high-scale platforms.
Deep expertise in distributed systems, event-driven architectures, and asynchronous job processing
Strong experience with relational and NoSQL data models (especially with complex temporal data)
Proven track record of architecting complex systems and delivering scalable, high-performance web apps in production.
Strong understanding of software design patterns, API design, and microservices architecture in a multi-tenant environment.
Skilled in guiding technical architecture, making high-impact engineering decisions, and mentoring fellow engineers.
Experience with code quality practices, automated testing, CI/CD pipelines, and dev tooling optimization.
Excellent problem-solving skills, with clear and collaborative communication across team.

Preferred Experience

Experience with AI Tools and contributions to open-source tools, internal platforms or engineering blogs
Experience with modern front-end frameworks (e.g., React, Vue, Angular) and building full-stack web applications.

EEO Statement

The company is an Equal Opportunity Employer. As an employer subject to affirmative action regulations, we invite you to voluntarily provide the following demographic information. This information is used solely for compliance with government record keeping, reporting, and other legal requirements. Providing this information is voluntary and refusal to do so will not affect your application status. This data will be kept separate from your application and will not be used in the hiring decision.