Job Description

About the Role:

Responsibilities

• Architect for massive scale Own the high-level architecture and scaling decisions for core Phone platform components, including CPaaS abstractions, provider adapters, and shared messaging/voice APIs that support billions of monthly events.

• Own Phone Billing end to end usage metering, rating, reserve/commit lifecycle, idempotency, reconciliation, and audit trails for the Phone and WhatsApp channels - with zero tolerance for double-charging or lost usage

• Lead the evolution of Trust & Compliance systems into a configuration-driven, rules-based platform that adapts to new regulatory and carrier requirements without invasive engineering change

• Work hands-on with technologies like NestJS, Firestore, MongoDB, PostgreSQL, Redis, Queuing Systems, Data Warehousing Systems and Service Mesh-based microservices

• Drive high-concurrency innovation Lead the design and execution of cross-cutting initiatives to improve reliability, latency, and throughput across time-sensitive APIs and workflows serving millions of businesses.

• Drive observability and resilience by evolving our monitoring, alerting (Prometheus/Grafana), and incident response strategies - including the financial invariants that must be alerted on, not just the technical ones

• Leverage LLMs and AI tools to write, refactor, test, and debug code efficiently - while implementing guardrails to reduce hallucination and boost reliability

• Partner with product, infra, security, finance and legal teams to ensure data integrity, access control, and compliance across phone services

• Develop EM I leaders and senior engineers, build leadership pipeline, succession planning and raise the hiring bar

• Participate in design reviews, deep dives, and on-call rotations to support a high-bar culture of accountability and operational excellence

• Develop leaders and senior engineers, build leadership pipeline, succession planning and raise the hiring bar

• Own multiple teams/products , establish the engineering system , set technical direction, develop leaders

Requirements

• 9+ years of backend engineering experience with 2+ years of leadership, with a proven track record of designing fault-tolerant systems that operate at a scale of billions of hits or events.
• Deep expertise in distributed systems, event-driven architectures, and asynchronous job processing
• Demonstrated experience building systems where correctness is non-negotiable - metering, ledgers, billing, payments, or comparable transactional domains - with a working grasp of idempotency, exactly-once semantics, and reconciliation
• Proven experience optimizing availability, performance, and reliability in real-world systems under load
• Strong experience with relational and NoSQL data models (especially with complex transactional data)
• Experience designing policy- or rules-driven systems that evolve with external requirements rather than hard-coding them
• Familiarity with monitoring, SLOs, and root-cause analysis in production environments
• Familiarity with hallucination mitigation strategies (e.g., code constraints, test scaffolding, embeddings, context injection)
• Excellent communication and cross-functional collaboration skills, including with Finance, Legal and external partners
• A pragmatic, hands-on leader who balances long-term vision with iterative execution

Preferred Experience

Experience with usage-based billing or metering engines in a high-volume product, specifically managing millions of transactional events per hour.

Exposure to telecom trust and compliance regimes - 10DLC, toll-free verification, TCPA/TSR, DLT, carrier filtering or number portability

Experience building provider-agnostic integration layers across multiple third-party vendors

Experience working with AI Tools, Communication APIs (Twilio, Plivo etc)

Contributions to open-source tools, internal platforms, or engineering blogs