Sathish S.

• • Led development of a shift-bidding platform serving large user-base workers, designing 5 .NET Core microservices using DDD (bounded contexts, domain events) to reduce coupling and enable independent scaling.

• • Improved system performance through EF Core query optimisation and Redis caching, reducing dashboard response times from 2.5s to 800ms (68%).

• • Built and maintained CI/CD pipelines with automated unit and integration tests, reducing release cycles from 2 weeks to 3 days, and eliminating manual deployment errors.

• • Refactored legacy logic, decomposing 3,000+ line stored procedures into clean, testable C# services, accelerating feature delivery by 40%.

• • Mentored 4 engineers in code reviews, design discussions, and TDD practices, achieving a 40% reduction in production defects and earning town hall awards for contributions.

• • Improved Agile delivery effectiveness, strengthening sprint planning, estimation accuracy, and execution consistency across the team.

• • Architected an AWS-native, domain-driven security platform for regulated enterprise clients, defining 8 bounded contexts for threat detection, vulnerability management, and compliance.

• • Built scalable backend services using AWS Lambda, S3, SNS/SQS, and RabbitMQ, processing 5M+ events daily with 99.95% uptime.

• • Designed and maintained RESTful APIs integrating third-party threat intelligence (VirusTotal, MISP), applying fault tolerance patterns for resilience.

• • Developed real-time dashboards enabling SOC analysts to respond to incidents 25% faster.

• • Implemented audit logging and data retention controls, supporting SOC 2 and ISO 27001 compliance requirements.

• • Designed and built secure .NET Core APIs for a multi-tenant e-commerce platform, integrating Stripe and PayPal with PCI-DSS–compliant transaction handling.

• • Implemented OAuth 2.0 and JWT-based authentication, securing APIs handling sensitive financial data.