Arbaz Balouch

Backend and Agentic AI Engineer with 3+ years building production Django/DRF systems and agentic AI at scale. Shipped 106+ REST APIs and real-time voice agents using LangGraph tool/function calling with Twilio and Deepgram, backed by multi-tenant PostgreSQL, Redis, and Celery. Strong focus on high-concurrency, reliable backends with Docker/Kubernetes CI/CD and Grafana/Sentry observability.

Backend Engineer - Quadroots Technology / Letshab

(2026-02 - 2026-05)

• Shipped 106+ REST APIs (DRF, OpenAPI 3.0) in 45 days for a multi-tenant tradesman platform with isolated tenant data, JWT authentication, and a team management module; deployed on Railway.
• Built the inbound AI voice agent (Twilio, Deepgram, LangGraph) with prompt-engineered LLM tool-calling and a CRUD-managed knowledge base populated via Scraper API sitemap crawling, handling calls, qualifying jobs, and booking appointments at scale.
• Designed high-concurrency architecture with PostgreSQL sharding by tenant_id and Redis connection pooling, supporting 1000s of concurrent users at <100ms latency; Grafana dashboards and Sentry for error tracking and analytics.
• Integrated bi-directional CRM sync across 6 platforms with webhook idempotency keys, OAuth 2.0/SSO + RBAC auth, and tiered Stripe billing with self-serve upgrade/downgrade and reconciliation.

Backend Developer - Quantix Labs

(2023-11 - 2025-12)

• Built REST APIs aggregating 30+ real estate and e-commerce data sources with normalization, deduplication, and incremental updates.
• Optimized PostgreSQL schemas with indexing, partitioning, and query tuning, cutting p95 latency by 60%; added a Redis caching layer improving API response times by 40%.
• Implemented optimistic locking for concurrent inventory updates, preventing race conditions and overselling in high-traffic scenarios.

Project Manager - Danhamz.co.uk

(2022-09 - 2023-08)

• Managed cloud infrastructure on Azure, including the CMS management system and OpenVPN servers on AD infrastructure for secure, controlled remote access to internal systems.
• Designed and maintained CI/CD pipelines with GitHub Actions for automated testing, container builds, and zero-downtime deployments.
• Containerized applications with Docker and orchestrated production workloads on Kubernetes; managed sprint planning via Azure Boards with Grafana dashboards for real-time monitoring.

BSc - Computer Science - Lahore Leads University (2023)