[ 09 / Services ]Backend

JAVA &
KOTLIN
ENGINEERING.

Enterprise-grade backend systems and native Android apps - built by engineers who have shipped to production in regulated industries.

[ What you receive ]

Backend that
never blinks.

Sahil brings 5+ years of enterprise banking software experience to every Java and Kotlin project - systems that are bulletproof, auditable, and built to last.

  • Spring Boot REST & GraphQL APIs
  • Microservices architecture
  • Enterprise backend systems
  • Native Android apps (Kotlin / Java)
  • Database design (PostgreSQL, MySQL, MongoDB)
  • JWT / OAuth2 authentication
  • CI/CD pipeline setup
  • Code review & architecture audits
Java development
[ Tech stack ]
Java 17+
Core language
Kotlin
Android & backend
Spring Boot
REST / microservices
Spring Security
Auth & RBAC
JPA / Hibernate
ORM layer
PostgreSQL
Primary database
Docker
Containerisation
Kafka
Event streaming
[ Capabilities ]

Senior only.
Shipped to prod.

Spring Boot APIs

Production-grade REST and GraphQL services built with Spring Boot - layered architecture, exception handling, and OpenAPI docs included.

Microservices

Service decomposition, inter-service communication (REST / Kafka / RabbitMQ), Docker + Kubernetes deployment.

Native Android (Kotlin)

Modern Android apps in Kotlin with Jetpack Compose UI, Room DB, Retrofit, Hilt DI, and Play Store release pipelines.

Enterprise Backend

Multi-tenant systems, role-based access control, audit logging, and compliance-ready data layers for regulated industries.

Database Engineering

Schema design, query optimisation, migration strategies, and connection pooling for PostgreSQL, MySQL, and MongoDB.

Banking-Grade Security

Sahil's enterprise banking background: JWT, OAuth2, HTTPS enforcement, input sanitisation, and penetration-test-ready codebases.

Architecture
[ Outcomes ]
Built right.
Runs forever.
Production Stability
Systems engineered to handle real traffic - not just hello-world examples.
Clean Architecture
Layered code, meaningful naming, and a codebase your in-house team can maintain.
Fast Iterations
Spring Boot's convention-over-configuration means faster delivery without shortcuts.
Full Ownership
You get the full source code, CI/CD pipeline, and deployment documentation.
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