SYSTEM.STATUS(ONLINE)
SWARUP_DAS // 8+ YEARS // LTIMINDTREE
LATENCY 41ms
SYSTEM.ARCHITECTURE // HEXAGONAL + AWS SERVICES: 24 // REGION: AP-SOUTH-1
DOMAIN LOGIC Primary Ports Secondary Ports CLIENT / APP Web · Flutter API GATEWAY routing · auth GraphQL / REST EVENT TRIGGERS Cron Jobs · Webhooks ASYNC QUEUES AWS SQS · Workers DMT · retries DATA PERSISTENCE MySQL · MongoDB Knex.js ORM EXTERNAL APIs Payment Gateways DRIVING: Primary Adapters initiating use cases INVERSION OF CONTROL: Core defines interfaces, adapters implement DRIVEN (INFRASTRUCTURE) Secondary Adapters implementing ports
CORE_HEALTH
Downtime: 0%
lambdaREADY
sqs_dmtHEALTHY
DELIVERY
architectureHEXAGONAL
focusISOLATION
PROFILE: SWARUP_R_DAS // SENIOR SOFTWARE SPECIALIST v2.0.0 · NODEJS_ECOSYSTEM · PUBLIC
SENIOR BACKEND ENGINEER · NODE.JS EXPERT

ARCHITECT THE BACKEND.
ENGINEER FOR SCALE.

With over 8+ years of experience, I craft high-performance, scalable Node.js backend solutions. I specialize in Hexagonal & Onion architectures, AWS Serverless orchestration (Lambda/SQS), and building resilient GraphQL/REST integrations that safely encapsulate unreliable third-party APIs.

loading engineering profile
>_ EXPLORE_SYSTEMS ESTABLISH_CONNECTION
ROLESoftware Specialist @ LTIMindtree
DOMAINFintech · Aviation · Retail
SPECIALTYAPI Architecture · Distributed Systems
IMPACT30% ↓ API Failures // 25% ↓ Dev Effort
01ENGINEERING.STACK
CORE BACKEND
Node.js / Express
high-throughput backend services
LANGUAGES
TypeScript / JS
type-safe APIs · orchestration
CLOUD
AWS Ecosystem
Lambda · SQS · CloudWatch
API PROTOCOLS
GraphQL / REST
frontend contracts · aggregation
ARCHITECTURE
Hexagonal / Onion
ports & adapters · boundaries
DATABASES
MySQL / MongoDB
relational & unstructured persistence
FRONTEND
ReactJS
UI components · React Hooks
MOBILE
Flutter / Dart
hybrid mobile app delivery
LANGUAGES
PHP / Python
legacy systems · scripting
ORM
Knex.js
query building · schema management
PROCESS
Agile / Scrum
project management · sprint delivery
TOOLING
Git / NPM / Composer
version control · dependency mgmt
02SELECTED.SYSTEMS
SYSTEM_01 // AVIATION_ARCHITECTURE

Delta Airlines — Backend Modernization

● HEXAGONAL_ARCH
Led the migration of legacy serverless APIs to a Hexagonal (Ports & Adapters) Architecture for a global aviation giant. This established the V2 backend platform, serving as the standard foundation for all new services while enabling the phased, low-risk modernization of existing APIs. By standardizing adapters and domain services, we significantly improved maintainability.
architectureHexagonal (Ports & Adapters)
computeAWS Lambda + Serverless
impact25% reduction in dev effort
observabilityCloudWatch Logs + Metrics
TypeScriptNode.jsAWS LambdaAWS SQSREST API
SYSTEM_02 // FINTECH_PAYMENTS

Airpay Vyaapaar — DMT Workflow

● ONION_ARCH
Architected domestic and international money transfer modules in a high-stakes fintech environment. Implemented Onion Architecture to streamline the integration of historically unreliable third-party APIs. Introduced AWS SQS to decouple transaction processing, fundamentally altering the system's failure profile and boosting overall success rates.
async processingAWS SQS integration
system resilience20% reduction in API downtime
transaction health30% fewer API failures
client contractGraphQL API implementation
Node.jsGraphQLAWS SQSMongoDBMySQL
SYSTEM_03 // RETAIL_OPTIMIZATION

E-Commerce Backend & Automation

● MIDDLEWARE_&_CRON
Developed and optimized critical backend processes for retail applications. Engineered custom Middleware interceptors to increase security and reduce overhead when communicating with external APIs. Built robust cron jobs to automate product updates, drastically cutting processing times and ensuring near-real-time data accuracy across the platform.
automationCron job optimization (1hr to <10min)< /b>
logistics30% faster order fulfillment
securityMiddleware interceptor routing
searchElasticsearch integration
Express.jsKnex.jsCron JobsElasticsearchJWT
03ENGINEERING.SIGNATURE
[ARCHITECTURE]
Isolate the Domain (Hexagonal/Onion). Relying on unreliable 3rd-party APIs is a reality. By using Ports & Adapters, I protect core business logic from external failures, reducing API downtime by 20%.
[ASYNC_FLOWS]
Decouple with Queues. Moving Domestic Money Transfer (DMT) workflows to AWS SQS reduced API failures by 30% and increased successful transactions by 20%.
[OBSERVABILITY]
Distributed Tracing is Mandatory. Implementing structured logging and tracing via CloudWatch Logs & Alarms drastically reduces mean time to resolution (MTTR) for complex serverless chains.
[CLIENT_CONTRACTS]
Optimize Frontend Communication. Designing efficient GraphQL APIs reduces development time for mobile/web teams by 20% while providing unmatched flexibility.
[AUTOMATION]
Ruthless Optimization. Whether it's migrating tracking systems to cut page load times or optimizing cron jobs to run in <10 minutes instead of an hour, performance matters.
04CERTIFICATION.RECORD
AWS
AWS Certified Cloud Practitioner
Amazon Web Services · 2024
VERIFIED
05SYSTEM.TERMINAL
SWARUP@BACKENDzsh · production-minded
swarup@backend:~$ whoami
Swarup Rohitosh Das — Senior Backend Engineer / Software Specialist
swarup@backend:~$ cat /location
Mumbai, Maharashtra, India
swarup@backend:~$ cat /focus
NodeJS · TypeScript · AWS Lambda/SQS · Hexagonal Arch · GraphQL · DB Optimization
swarup@backend:~$ status
● delivering high-performance, scalable solutions
06ESTABLISH.CONNECTION
contact --init
EMAIL
[email protected]
→
STACKOVERFLOW
stackoverflow.com/swarup260
→
LINKEDIN
linkedin.com/swarup-das
→
GITHUB
github.com/swarupdas
→