Malik

Senior Backend Engineer with 4+ years building high-throughput fintech platforms handling 5M+ daily transactions at 99.99% uptime. Expertise in distributed systems, microservices architectures, system design, AWS, Kafka, and payment infrastructure. Led architectural transitions from monolithic to distributed services, designed Apple Pay provisioning integration, and implemented production observability pipelines.

Senior Backend Software Engineer - AKSA Business Technologies (JazzCash)

(2025-04)

• Architected microservices platform serving 5M+ daily financial transactions at 99.99% availability with API Gateway routing, service discovery, and circuit-breaker patterns
• Led end-to-end R&D and backend integration of Apple in-app provisioning, implementing cryptographic protocols for secure card tokenization integrated with Apple Pay infrastructure
• Increased system throughput 3x by decoupling Kafka streams and Redis caching, reducing API latency 60% and eliminating connection pool bottlenecks
• Integrated payment gateway for 5M+ daily payments with retry logic and idempotency guarantees ensuring zero payment loss, enforced OAuth2/AES-256 encryption
• Optimized MongoDB aggregation pipelines for financial analytics dashboards, reduced query latency 40% with compound indexes and pipeline stages
• Designed Prometheus and Grafana observability platform capturing request tracing and error clustering, reduced MTTF 30% and eliminated production blind spots
• On-call incident response maintaining 99.99% SLA, investigated P1 incidents in payment flows and infrastructure

Full Stack Engineer - Vizz Web Solutions Pvt. Ltd

(2023-07 - 2025-03)

• Migrated monolithic system to microservices architecture, reduced deployment time 70%, improved fault isolation, enabled independent team deployments
• Decoupled invoice generation and email delivery from checkout flow, removed 2-3s blocking bottleneck, improved checkout success rate and reduced customer friction
• Achieved 100% checkout reliability under high traffic through load balancing, connection pooling, and query optimization with centralized logging
• Built modular microservices for user management, analytics, and templates tracking invoice trends, peak hours, and revenue metrics
• Implemented Redis caching across product data and analytics, reduced dashboard latency 70% and checkout performance improved 40%
• Integrated Stripe APIs for subscriptions and billing, containerized services with Docker, orchestrated deployments on AWS with zero-downtime CI/CD

Node.js Developer - Digital Sensei Technology

(2022-07 - 2023-06)

• Scaled REST API from hundreds to thousands of DAU with token-bucket rate-limiting using Redis, prevented API abuse and connection exhaustion, maintained <200ms p99 latency
• Maintained sub-200ms p99 latency during 10x traffic spikes through event loop profiling, SQL optimization, read replicas, and Redis connection pooling
• Built MongoDB transaction workflows ensuring data consistency across financial and user operations with atomic operations for payments
• Automated backend processes with cron jobs, integrated Twilio and email systems for real-time transactional alerts affecting millions monthly

Bachelor of Science - Software Engineering - Bahria University, Islamabad (2022-06)