~/portfolio/overview.tsx

$ whoami → full-stack / fintech / api engineer

I build software that actually ships.

Product-focused Full Stack Developer with 2.5+ years of experience designing and building secure, scalable fintech, payment, banking, B2B and travel technology platforms using Laravel, APIs and modern backend systems.

Explore my work

2.5+ yrsHANDS-ON EXPERIENCE

REST / APIINTEGRATIONS

FintechPAYMENTS / BANKING

ProductionDEPLOYMENT / SUPPORT

sarvesh@devbox:~

sarvesh@devbox:~$ profile --summary

→ role: Full Stack Laravel / Fintech Developer

→ exp: 2.5+ years hands-on

→ location: Noida, Uttar Pradesh, India

sarvesh@devbox:~$ cat stack.json

{

"backend": ["PHP","Laravel","Python","FastAPI"],

"frontend": ["React.js","JavaScript","Blade","HTML/CSS"],

"api": ["REST","JSON","XML","JWT","Webhooks"],

"data": ["MySQL","Ledgers","Transactions","Row Locks"],

"ops": ["Ubuntu","Nginx","PHP-FPM","SSL","DNS","Git"]

}

sarvesh@devbox:~$

~/portfolio/about.md

02

About / profile

Developer first. Product thinker too.

I care about the complete flow: database, backend, external APIs, interface, deployment and what happens when real users hit the system.

I build and maintain backend-heavy web products where integrations, transaction safety, business rules and maintainability matter. My core work spans Laravel/PHP, API-driven systems, fintech workflows, MySQL transaction logic, production deployment, and third-party provider integrations. I also work with Python/FastAPI and React.js for modern API and frontend use cases.

I have hands-on experience taking provider documentation from integration and testing through production deployment and support. My work includes wallets, financial ledgers, commissions, settlement flows, callbacks/webhooks, KYC/biometric flows, travel booking logic, API wrappers and production troubleshooting.

Experience2.5+ Years

LocationNoida, Uttar Pradesh

EducationBCA · 2023

Core domainFintech + Travel

~/portfolio/stack.lock

03

Toolbox / technologies

My day-to-day stack.

Technologies I use to build, integrate, debug and deploy production web systems.

LaravelMVC / ELOQUENT / SERVICES

PHPBACKEND

PythonBACKEND

FastAPIAPI BACKEND

React.jsFRONTEND

JavaScriptFRONTEND

MySQLTRANSACTIONS / LOCKING

REST APIsJSON / XML / CURL

JWT & API AuthSECURITY

WebhooksCALLBACKS / LOGGING

Linux / UbuntuSERVER

Nginx / PHP-FPMPRODUCTION

SSL / CertbotHTTPS / DNS

Git / GitHubVERSION CONTROL

ComposerDEPENDENCIES

PostmanAPI TESTING

~/portfolio/projects/selected

04

Selected / work

Systems I like building.

Representative product areas from my development work — focused on architecture and problem-solving, not just screenshots.

DOMAIN // 01

Fintech B2B & API Platform

Multi-service fintech systems covering AEPS, Aadhaar Pay, BBPS, DMT, PayIn/payment gateway, payout, UPI cashout, account verification, merchant onboarding, wallets, commissions, settlements, reports and admin/user ledgers.

LaravelFintechWalletLedgerAPI

DOMAIN // 02

AEPS & Aadhaar Pay

Merchant onboarding/activation, biometric authentication, cash withdrawal, balance enquiry, mini statement, Aadhaar Pay, OTP flows, transaction status/query, commission calculation and provider logging.

BiometricKYCOTPMantra/Morpho

DOMAIN // 03

BBPS Bill Payment

Biller/category discovery, dynamic customer parameters, bill enquiry, validation, bill payment, callbacks, transaction status and settlement tracking for utilities, recharge, FASTag and credit-card bill payments.

BBPSBillingCallbacksSettlement

DOMAIN // 04

DMT / Money Transfer

Sender registration, OTP and biometric verification, beneficiary workflows, IMPS/NEFT transfers, validations, wallet debit, commissions, status handling and provider-response logging.

DMTIMPSNEFTBeneficiary

DOMAIN // 05

Payment Gateway / PayIn & Payout

Payment initiation, checkout/redirect, card/UPI flows, webhook processing, UTR/status verification, charges, settlements, reversals, reconciliation and secure wallet integration.

PayInPayoutUPIWebhookReconciliation

DOMAIN // 06

Travel Booking Systems

Flight/hotel API flows including search, fare quote/upsell, SSR, booking, ticketing, PNR, booking details, cancellation, agent markup, wallet deductions and booking ledgers.

FlightsHotelsSSRPNRMarkup

~/portfolio/history.log

05

Experience / timeline

What I’ve been working around.

A concise view of the engineering areas that shaped my current skill set.

2024 — PRESENT
NOIDA, INDIA

CODEGRAPHI TECHNOLOGY PVT. LTD.

Full Stack Laravel / Fintech Developer

Develop and maintain Laravel-based fintech platforms across Admin, API, B2B, merchant, retailer, distributor and agent workflows.

API
ENGINEERING

INTEGRATIONS + WRAPPER LAYERS

Financial Service API Integration

AEPS, Aadhaar Pay, BBPS, DMT, IMPS/NEFT, payout, PayIn/payment gateway, UPI cashout, account verification and merchant onboarding. Build reusable wrapper layers to standardize third-party provider requests and responses.

TRANSACTION
SAFETY

WALLETS + LEDGERS + COMMISSIONS

Financial Transaction Logic

Balance validation, debit/credit, charges, commissions, settlements, reversals and reconciliation. MySQL transactions and row-level locking help reduce race conditions and duplicate wallet debits.

PROVIDER
EVENTS

CALLBACKS + WEBHOOKS + AUDIT LOGS

Production-grade API Observability

Status-query, callback and webhook flows that capture request IDs, payloads, provider responses, HTTP status and execution details for troubleshooting and reconciliation.

KYC / RD
SERVICES

BIOMETRIC + AUTHENTICATION

AEPS / DMT Verification Workflows

Mantra/Morpho RD service handling, OTP verification, Aadhaar-based authentication, biometric/KYC flows and device-response processing.

DEVOPS
PRODUCTION

UBUNTU VPS + NGINX + PHP-FPM

Deployment, Debugging & Release Support

Git/GitHub deployments, Composer, SSL certificates, DNS/subdomains, Laravel permissions/cache optimization, environment configuration and troubleshooting HTTP 500, provider API and server issues.

~/portfolio/services.json

06

Can help with

From idea to production.

Custom Web Applications

Laravel, FastAPI and React.js based business applications, portals, dashboards and workflow systems.

API Integration

Third-party API integration, wrappers, callbacks, logs, authentication and error handling.

Deployment & Production Fixes

Linux server setup, Laravel deployment, SSL, DNS, Apache/Nginx and debugging.

~/portfolio/profile/data.json

07

Profile / credentials

Education, strengths & languages.

The non-code details that complete my professional profile.

Bachelor of Computer Applications (BCA)
Gorakhpur, Uttar Pradesh · Completed 2023

Senior Secondary (12th) · 2020
Secondary School (10th) · 2018

Languages
Hindi — Native · English — Professional Working Proficiency

CORE STRENGTHS

Fintech API IntegrationLaravel Backend Financial Transaction LogicWallet & Ledger Architecture Payment Gateway IntegrationAPI Wrapping Production DeploymentServer Management Debugging & ReconciliationTeam Collaboration

~/portfolio/life/outside-terminal

07

Beyond code / moments