Java backend development
Spring Boot services, REST/OpenAPI contracts, domain logic, persistence, testing and maintainable integration code.
Senior Java & Cloud Engineer · 7+ years
Senior Java engineer for complex backend and cloud systems.
I build and modernize production applications using Java, Spring Boot and AWS. Across identity, payments, enterprise SaaS and multi-system product platforms, I take ownership from technical diagnosis and design through implementation, validation and production readiness.
- Primary stack
- Java · Spring Boot · AWS
- Best fit
- Senior backend / platform engineering
- Based in
- Bengaluru · Remote worldwide
Open to senior engineering roles and selected contract work
7+ yearsEnterprise product engineering
Java 8–21Modern and legacy JVM systems
Sony + consultingProduct and client delivery
Backend to UIEnd-to-end technical ownership
Engineering profile
Backend depth with product-level ownership.
I contribute where implementation depth and system understanding matter: designing APIs, untangling legacy behavior, integrating external systems and taking production defects from symptom to verified fix.
AWS application engineering
Lambda, API Gateway, S3, RDS, CloudWatch, CloudFront, Secrets Manager, deployment flows and serverless integrations.
Production engineering
Cross-service debugging, log and payload analysis, root-cause isolation, performance work and incident-focused fixes.
Modernization & refactoring
Incremental upgrades, decomposition of large services, safer state transitions, regression protection and CI/CD readiness.
Identity & secure integrations
OAuth2, OIDC, JWT, SAML, RBAC, payment APIs, partner systems, retries, idempotency and auditability.
Full-stack delivery
React/TypeScript and Vue/Nuxt experience for features and defects that cross API, state-management and UI boundaries.
Selected engineering work
Development work across production systems.
Employer and client identities are anonymized except Sony. Each case focuses on the engineering problem, my contribution and the technical decisions involved.
01
Backend platform engineering
Progressive model builder for large enterprise data platforms
Refactored a 2,000-line Java workflow into focused components and added safe progressive updates that preserve user-defined structure.
02
Backend & full-stack product platform
Production fixes across Java APIs, AWS, OpenSearch and Vue/Nuxt
Delivered backend-heavy fixes for authorization, inventory, product specifications and service content across a multi-system customer platform.
03
Sony · Cloud identity platform
Secure identity and resilient large-file workflows on AWS
Built and improved authenticated cloud workflows spanning Java services, AWS serverless components, large-file uploads and React interfaces.
04
Enterprise SaaS platform
Multi-user draft, publish and event-recording workflows
Implemented backend lifecycle behavior for shared drafts, publishing, cancellation, role-based visibility and service event recording.
05
Sony & telecom payment systems
Payment APIs and resilient partner integrations
Developed Java/Spring transaction flows for cloud payments and direct carrier billing with idempotency, retries and reconciliation.
How I contribute
Technical ownership without losing implementation depth.
Build
Production Java services, API contracts, data workflows, integrations and end-to-end application features.
Diagnose
Incorrect state, API mismatches, authorization failures, data mapping defects and cross-system production issues.
Improve
Legacy structure, testing, resilience, observability, performance, deployment confidence and maintainability.
Experience
Enterprise engineering since 2019.
Assistant Manager / Senior Java Engineer
Global consulting firm
Java backend platforms, AWS integrations, metadata automation, enterprise workflows and production delivery.
Senior Software Engineer
Sony India Software Centre
Cloud identity platform, resumable file workflows, serverless APIs and payment integrations.
Software Engineer
Product engineering company
Direct carrier billing, partner APIs, resilient transaction flows and operational tooling.
Associate Software Engineer
Technology services company
Java/Spring case-management services, React applications, search, pagination and production monitoring.
About
A senior engineer who stays close to the implementation.
I’m Sangamesh Gadag, a Java-focused software engineer based in Bengaluru. I have delivered production systems in both product and consulting environments, including Sony, while working directly with engineering, product and business stakeholders.
I am most effective on backend-heavy work that requires more than closing a ticket: understanding the system, challenging unsafe assumptions, choosing practical trade-offs, implementing the change and validating it across service boundaries.
Strong Java, Spring and API design fundamentals
Hands-on AWS delivery
Production debugging across distributed systems
Secure identity, payments and partner integrations
Technical ownership with clear communication
Contact