Sai Charan

About Sai Charan

I am a Senior Backend & Full Stack Engineer with over 8 years of experience building…

Experience

1. Senior Backend Engineer Python & Cloud Infrastructure

   Wells Fargo

   Jun 2024 — Present · AZ, US

   Designed, developed, and deployed Flask-based microservices on GCP (GKE, Cloud Run, BigQuery, Secret Manager), managing millions of customer survey records with secure, scalable pipelines.• Built and optimized RESTful APIs and gRPC services with OAuth2/Google Identity & JWT validation, enabling seamless integration with enterprise workflows.• Led end-to-end API development lifecycle – from design documents to unit testing, functional testing, and deployment – ensuring high-quality, production-ready releases.• Architected data ingestion and ETL pipelines using Python multiprocessing, asyncio, pandas, and SQLAlchemy, boosting processing efficiency by 60%.• Integrated BigQuery and Oracle/PostgreSQL for large-scale analytical and transactional workloads, improving query performance and reducing latency.• Applied cloud-native design principles with Pub/Sub and Cloud Tasks, enabling event-driven architectures with retries, resilience, and reduced reliance on monolithic schedulers.• Built and enforced CI/CD pipelines in GitLab CI and Cloud Build, automating linting, unit testing, container builds, security scans, and deployments.• Ensured code quality and maintainability by implementing TDD/BDD methodologies (pytest, behave) and achieving 95%+ test coverage.• Strengthened system reliability by deploying TLS/HTTPS load balancers, KMS encryption, and schema validation (Marshmallow) for backend services.• Enhanced observability by integrating Prometheus, Grafana, and PagerDuty alerts to proactively monitor application health and SLA performance.• Applied DevSecOps-first practices, embedding IAM policy automation, secret rotation (GCP Secret Manager), and security enforcement in every pipeline.• Collaborated with cross-functional Agile teams (architects, analysts, QA engineers) to translate business requirements into scalable technical solutions.

Education

• University of Dayton

  Master of Science - MS

• Guru Nanak Institutions(GNI)

  Bachelor's degree