Open to opportunities

sanchit aggarwal

@sanchitaggarwal

Message

Senior Python backend engineer building PCI-compliant, high-throughput platforms with microservices and data pipelines.

India

Message

What I'm looking for

I want a backend role where I can own high-throughput, PCI-grade systems or real-time Spark pipelines, reduce latency and incidents, and build microservices with strong CI/CD while collaborating with distributed product and security teams.

I’m a Senior Python Backend Engineer with 10+ years of experience building scalable, highly available systems across fintech, healthcare, e-commerce, SaaS, and blockchain. I specialize in Python, Django, FastAPI, and AWS, with deep mastery of microservices architecture, REST API design, and high throughput data engineering with Apache Spark.

I spearheaded PCI-compliant payment platforms processing 500K+ daily transactions at 99.99% uptime, delivering a 45% latency reduction and 60% pipeline improvement. I drive engineering excellence through TDD, CI/CD automation, automated alerting, and cross-functional collaboration, including mentoring junior engineers and leading monolith to microservices transformations.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Developer

Current

Aditi Tech Consulting

Jun 2025 - Present (1 year)

Designed and owned production backend services powering 500K+ daily financial transactions with a 99.99% SLA using circuit breakers, retry policies, and self-healing failover. Owned PCI-DSS compliance for payment workflows and mentored junior engineers through architectural reviews before releases.

Python fastAPI Django Apache Spark Redis PostgreSQL AWS Docker DynamoDB PCI DSS

Senior Software Engineer

Logistic Infotech

Jun 2024 - Jun 2025 (1 year)

Led backend architecture for e-commerce and healthcare SaaS scaling to 100K+ active users with sub-200ms API response targets. Increased deployment frequency by 30% via CI/CD improvements, led a monolith-to-microservices transformation, and reduced reporting latency from 7 days to real time using Spark analytics.

Python fastAPI Django Apache Spark Microservices PostgreSQL Docker GitHub Actions

Senior Software Developer

Aditi Tech Consulting

Nov 2022 - Jun 2024 (1 year 7 months)

Built and maintained global merchant onboarding and payment management systems using FastAPI and Django, reducing production incidents by 25% through pre-merge code reviews and fully automated regression suites. Developed idempotent financial APIs with structured logging and replay protection, cutting MTTR by 35% while integrating with fraud detection and compliance services.

Python Django fastAPI MongoDB Redis AWS

Senior Software Developer

DH Healthcare Software Services

Nov 2021 - Oct 2022 (11 months)

Architected HIPAA-compliant backend systems in Python and Django, building role-based secure data access with field-level encryption and delivering 20+ REST APIs for clinical dashboards across 5+ hospital facilities. Optimized AWS infrastructure (auto-scaling, load balancing, RDS read replicas), reducing infrastructure costs by 18% while improving availability.

Python Django REST APIs PostgreSQL HIPAA compliance Role Based Access Control

Senior Backend Developer

Apar Peopleworld

Jun 2021 - Nov 2021 (5 months)

Developed REST and GraphQL APIs for blockchain-based healthcare platforms, improving API response time by 20% through query optimization and N+1 resolution. Implemented JWT authentication and RBAC across services, and integrated backend services with React.js to improve operations reporting efficiency by 40%.

Laravel Django fastAPI GraphQL MySQL MongoDB AWS JWT RBAC Query Optimization

Software Developer

Multiple Organizations

Oct 2014 - Jul 2021 (6 years 9 months)

Engineered resilient backend systems for retail e-commerce platforms sustaining a 40% seasonal traffic surge with zero downtime. Delivered 20+ client web applications across retail, education, and services while maintaining high uptime across concurrent engagements.

PHP Laravel MySQL PostgreSQL JavaScript backend architecture