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Rajat Kumar Rout

Backend Engineer · Founding Product Engineer

● available for hire3+ yrs productionBengaluru, INNode · AWS · Kafka
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01 — about

Who I Am

bash — rajat@dev
❯curl -s https://rajat.dev/api/v1/whoami
"name":"Rajat Kumar Rout"
"role":"Backend Eng / Founding Product Eng"
"experience":"3+ years"
"superpower":"Ambiguous problems → scalable systems"
"location":"Bengaluru, India"
"status":"AVAILABLE_FOR_HIRE"
"stack":["NestJS","Node.js","AWS","Kafka","ElasticSearch"]
❯

Current Mission

Building resilient backend systems at FlyWl — from search engines to credit ledgers to notification pipelines. Owning the full lifecycle from design to production.

Core Philosophy

Systems should be observable, reversible, and boring in production. Great engineering is mostly invisible — it handles the edge cases you hadn't thought of yet.

How I Work

I use Cursor AI and ChatGPT as force multipliers, not crutches. Prototype fast, measure with data, iterate. Cut feature delivery time by ~40% this way.

Beyond Code

Deeply interested in product strategy, fintech infra, and AI-native tooling. I work best where backend engineers have a real voice in product decisions.

// summary

I'm a backend engineer with 3+ years building microservices, event-driven systems, and fintech infrastructure at scale. Currently a Founding Product Engineer at FlyWl — not just writing code, but helping define what gets built and why. I do my best work in small, high-ownership teams where engineering and product thinking are inseparable.

02 — skills

Tech Stack

Languages & Frameworks

TypeScriptJavaScriptNode.jsNestJSExpress.jsGraphQL

Databases

PostgreSQLMongoDBRedisElasticSearchVector DB

Cloud & Infra

AWS LambdaSQSSNSCloudWatchS3CognitoServerlessAWS MarketplaceEDP

Messaging & Events

Apache KafkaEvent-Driven ArchitectureBPMNCamunda

Auth & Security

JWTPBACORY OathkeeperORY KratosOAuthAWS Cognito

AI & Productivity

Cursor AIChatGPTClaude CodeLLM APIsVector EmbeddingsAI prototypingCode generation

Analytics & Observability

MixpanelSuprSendCloudWatchAsyncLocalStorageStructured Logging

Product & Business

Feature scopingRoadmap planningUser feedback loopsGo-to-market

03 — experience

Where I've Worked

FlyWl

Founding Product Engineer

Nov 2024 – Present

active
  • —Shaped product vision, feature scoping, and roadmap alongside founders
  • —Built Seller Profile & Claim Module end-to-end (largest feature) — CRUD with pagination/search, FUID generation via nanoid, seller claim flow, PBAC guards, login refactor, company attribute updates, and vendor search by website
  • —Engineered Notification & Analytics Event Engine from scratch — event builder, SNS publisher interface, event store consumer; integrated SuprSend (Email/Push) and Mixpanel analytics; session ID propagation via AsyncLocalStorage into structured logger
  • —Implemented PBAC permission system — guards on role/permission controllers, permission management APIs (view, add, update), FinOps and procurement roles, internal user migration permissions
  • —Built AWS Spend Modelling & EDP — spend comparison, EDP commitment costs, marketplace summary, drawdown overage and dead weight loss calculations; AWS Marketplace users migration
  • —Designed AI-powered vendor matching: LLM API enriches vendor details from the product catalog, creates embeddings stored in a vector DB — enabling semantic similarity search at match time
  • —Built Wallet/Credit Module — wallet creation API, global ledger, cron job for credit expiry, expired credit balance calculations
  • —Built Product Catalog search engine (ElasticSearch), User Invitations flow (role-based access, invitedBy tracking), and AWS Cognito auth
  • —Used Cursor AI, ChatGPT, and Claude Code as force multipliers — cut feature delivery time by ~40%
NestJSElasticSearchAWSSNSMixpanelPBACSuprSendLLM APIsVector DBClaude CodeAsyncLocalStorage

Klub

SDE1 — Backend Engineer

Nov 2022 – Sept 2024

  • —Automated 98% of loan applications — 90% reduction in manual ops workload
  • —Built product config system with PostgreSQL indexing — 10× faster queries
  • —Document storage with polymorphic associations — 80% faster search
  • —Kafka event-driven data platform for NBFC partners — 70% faster delivery SLA
  • —Managed 20+ BPMN workflows in Camunda — 50% fewer manual interventions
  • —Upgraded 7+ microservices from Node.js v12 to v18 with zero downtime
Node.jsPostgreSQLKafkaCamundaServerlessORY Auth

04 — projects

What I've Built

Credit Engine

Powers real money transactions in production

Full ledger + wallet management with complete transaction lifecycle. Handles earn, redeem, expire, and rollback with ACID guarantees.

NestJSPostgreSQLAWS

Catalog Search Engine

High-cardinality product catalog at scale

ElasticSearch-powered relevance scoring with fuzzy matching and custom analysers for domain-specific search.

ElasticSearchNode.jsNestJS

Notification Engine

Email · SMS · Push — zero message loss

Multi-channel, fully async, deduplication-safe notification system with retry semantics and delivery receipts.

AWS SQSSNSSuprSend

Loan Automation Platform

90% manual workload eliminated

98% automated loan application processing via serverless API orchestration, replacing a heavily manual ops workflow.

Node.jsServerlessPostgreSQL

Kafka Event Platform

70% faster data delivery to partners

Real-time data sharing pipeline for NBFC partners. Schema-validated, idempotent consumers, dead-letter handling.

KafkaNode.jsAWS

BPMN Workflow Engine

50% fewer manual interventions

Camunda-based orchestration for complex loan lifecycle management. 20+ process definitions with human task management.

CamundaNode.jsBPMN

05 — metrics

Impact by the Numbers

0%

Loan Automation

Applications fully automated

0%

Faster with AI

Feature delivery time cut

0×

Query Speed

PostgreSQL optimisation

0%

Search Speed

Document search improvement

0%

Data Delivery

Kafka pipeline SLA gain

0+

BPMN Workflows

Camunda processes managed

system.audit
$system.audit --since=2022
→ microservices upgraded:7
→ manual workload reduced:90%
→ AI tooling:Cursor AI, ChatGPT
→ systems shipped:Credit Engine, Search, Notifications, Loans
→ status:HEALTHY ✓
❯

06 — contact

Let's Talk

Open to founding eng roles, backend-heavy SDE2+, and infra-heavy products in fintech or AI-native spaces.

✉

email

rajatrout470@gmail.com

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☎

phone

+91 9408142406

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in

linkedin

linkedin.com/in/rajatrout

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<>

github

github.com/rajatrout

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⊕

location

Bengaluru, India

Open to

  • +Founding / early-stage engineering roles
  • +Backend-heavy SDE2+ positions
  • +Infra-heavy product companies
  • +Fintech & financial infrastructure
  • +AI-native startups
  • +Remote or Bengaluru-based

Building something in fintech, AI, or infra? I'd love to hear about it.

✉Send a message
↓Resume