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Open to senior engineering opportunities · Remote or relocation

SreejitParakkalam

Senior Full-Stack Engineer. I design and ship production systems that stay fast under real traffic.

Ahmedabad, India

Let's talk
See my work
Years shipping production software
0+
API requests handled per day
0k+
Faster queries after schema redesign
0%
Engineers mentored
0

01About

Built for production, ready for what's next.

Senior full-stack engineer with 8+ years designing and shipping scalable web and mobile systems on the MERN and MEAN stacks.

I lead end-to-end delivery: Node.js backends, React, Angular and Next.js frontends, working with product and business teams under real performance and security constraints.

Actively seeking full-stack and backend roles. Ready to relocate anywhere for the right team.

  • FrontendReact.js · Angular · Next.js
  • BackendNode.js · Express.js · REST APIs
  • DataMongoDB · MySQL · SQL
  • OpsDocker · Linux · Nginx/Apache

02Experience

Eight years of shipping.

  1. Jan 2020 – Present

    6 yrs+

    Sculp Tech

    Technology partner for Magnum Trading

    • Senior Software DeveloperJan 2020 – Present
    • Senior Software Developer · Magnum Trading engagementApr 2023 – Present

    Technology management and development partner for Magnum Trading. Leading end-to-end full-stack delivery of product and operations systems under a long-term engagement.

    • Architected and maintained Node.js + Express REST APIs handling 10k–50k+ requests/day
    • Designed MongoDB and MySQL schemas, improving query performance by ~30–40%
    • Built APIs and frontend modules used daily by operations and management
    • Contributed to React, Angular and Next.js frontend architecture and load times
    • Mentored 3–5 junior developers and enforced code-review standards
    Node.jsExpressReactAngularNext.jsMongoDBMySQLLinux

  2. Dec 2017 – Dec 2019

    2 yrs

    Sculp Tech

    • Software DeveloperDec 2017 – Dec 2019

    Full-stack development of production web applications with JavaScript, Angular and Node.js.

    • Built and maintained REST APIs and backend services
    • Implemented MongoDB/SQL schemas and query optimizations
    • Shipped reusable Angular and TypeScript UI components
    JavaScriptTypeScriptAngularNode.jsMongoDBSQL

  3. Jul 2014 – May 2015

    11 mo

    Sahana Defence Limited

    Formerly Softvan Limited

    • Project InternJul 2014 – May 2015

    Hands-on software development and project delivery foundations.

    • Contributed to team development projects
    • Learned industry practices for shipping software

03Selected work

Systems I've built and scaled.

Turtur logo

Android · Offline messaging + SOS

Turtur

Festival crews, trekkers and hikers lose contact the moment there is no cell tower, and every mainstream messenger and safety app depends on a server.

Role
Designed and built the app end to end: Bluetooth LE sync protocol, store-and-forward engine, sealed-box crypto, SOS beacon with finder and Compose UI.
Outcome
Serverless, end-to-end sealed messaging where nearby trip members carry letters they cannot read, plus a Bluetooth SOS beacon that alerts nearby Turtur phones with a signed GPS fix.
  • No servers, no accounts
  • X25519 + ChaCha20-Poly1305
  • Bluetooth SOS beacon + finder
KotlinJetpack ComposeBluetooth LEAndroid
View source
edgar-rag logo

AI · Local RAG

edgar-rag

10-K annual reports are huge, messy HTML filings, and AI chat answers about them often invent figures with no way to check the source.

Role
Built the pipeline solo without LangChain: SEC EDGAR ingestion, Item-aware parsing and chunking, Chroma retrieval with company filters, grounded prompting and a labeled eval set.
Outcome
A fully local assistant that answers questions about Apple, Microsoft and NVIDIA 10-Ks with citations to the exact filing section and automatic checks that flag made-up numbers.
  • 100% evidence hit rate on 24-question eval
  • Grounding + citation checks
  • Runs locally, no API keys
PythonOllamaChromaStreamlitRAG
View source
Zikkaron logo

Full-stack · Web3 civic tech

Zikkaron

Property owners and authorities lack a shared, tamper-evident record to deter squatters and property fraud.

Role
Built the monorepo: upgradeable Solidity contracts, Express + PostgreSQL authority APIs with SIWE auth, and a Next.js frontend.
Outcome
A memorial layer with timestamped on-chain property records, evidence packs and an Authority Console for case handoff to agencies.
  • UUPS upgradeable contracts
  • SIWE sessions + role approval
  • CI for contracts, API and web
SolidityNext.jsExpressPostgreSQLPolygonIPFS
View source
Snapcase logo

Chrome extension · Developer tools

Snapcase

Bug reports like "it's broken" leave developers chasing screenshots, network logs and repro steps across several back-and-forths.

Role
Built the Manifest V3 extension: page-world fetch/XHR and console capture, rrweb replay, redaction engine, annotation editor and offline report viewer.
Outcome
One click produces a zip with a marked-up screenshot, auto-written steps, every API call, console errors and a session replay, with Simple and Advanced modes.
  • Redaction before storage
  • HAR export + offline report.html
  • No servers, no build step
JavaScriptChrome ExtensionsrrwebJSZip
View source

Full-stack · Internal product

Trading Operations Platform

Operations and management teams ran daily workflows across spreadsheets and disconnected tools, with no single source of truth.

Role
Led architecture and delivery across API, data model and frontend modules.
Outcome
A unified web platform used daily by operations and leadership, shipped under continuous feature delivery without downtime.
  • Daily active use across teams
  • Continuous delivery since 2023
Node.jsExpressReactMongoDB

Backend · Performance

High-Traffic API Layer

Growing request volume was pushing response times up and exposing slow queries in the data layer.

Role
Designed the REST API surface, reworked MongoDB and MySQL schemas, and set review standards.
Outcome
Stable APIs serving tens of thousands of requests a day with noticeably faster reads after schema and index work.
  • 10k–50k+ requests/day
  • ~30–40% faster queries
Node.jsExpressMongoDBMySQLNginxLinux
Purrsistent logo

macOS app · Desktop pet

Purrsistent

Long hours alone at the screen, whether working or just chilling, can feel isolating and lonely.

Role
Built the native app solo: a live-rigged anime kitten with keyframed poses and springy ears and tail, a behavior state machine, mood and treats, break reminders and a transparent click-through window.
Outcome
A tiny cat companion that walks along the Dock, watches your cursor, purrs when stroked, greets you when you come back and reminds you to take breaks, all without covering windows or getting in the way of real work.
  • 20+ animated behaviors
  • 5 coats, 4 art styles, 3 voices
  • Pixel-level click-through
SwiftAppKitmacOS
View source
Winter Arc logo

Web app · Fitness PWA

Winter Arc

Lifters juggle notes apps and timers to plan routines, log sets and see whether they are actually progressing.

Role
Built the app solo: routine builder, workout logging with rest timer, progress analytics and reminders.
Outcome
An installable PWA to build multi-day splits, log every set and track streaks and volume over the season.
  • Installable PWA
  • Streaks + 30-day volume tracking
Next.jsReactTypeScriptTailwind CSSSupabase
View source
TweetWipeScrubX logo

Chrome extension · Privacy

TweetWipeScrubX

X offers no way to bulk delete old posts or find embarrassing ones, and its API is expensive to use.

Role
Built the Manifest V3 extension: in-page automation, a word-list content filter and pluggable AI moderation.
Outcome
Bulk deletes posts, reposts and likes with filters, and flags inappropriate posts for review using on-device or API-based AI.
  • No X API needed
  • On-device Chrome AI option
JavaScriptChrome ExtensionsOpenAIGemini
View source

Mobile · Cross-platform

Hybrid Mobile Companion App

Field users needed the core web workflows on their phones without a separate native codebase to maintain.

Role
Built the hybrid app shell and shared the TypeScript domain logic with the web frontend.
Outcome
One codebase shipping to Android and iOS, reusing existing APIs and UI components.
  • Android + iOS from one codebase
  • Shared API and UI layer
IonicCapacitorAngularTypeScript

04Toolkit

The stack I reach for.

  • Node.js
  • React
  • TypeScript
  • Next.js
  • Express
  • MongoDB
  • MySQL
  • Angular
  • Docker
  • Linux
  • System design
  • REST APIs

Frontend

05
  • React.js
  • Angular
  • Next.js
  • TypeScript
  • JavaScript

Backend

04
  • Node.js
  • Express.js
  • REST APIs
  • Microservices

Data

03
  • MongoDB
  • MySQL
  • SQL

Ops

05
  • Docker
  • Linux
  • Nginx/Apache
  • CI/CD
  • Git

Mobile

03
  • Ionic
  • Capacitor
  • Hybrid apps

Practice

03
  • System design
  • Performance
  • Code review

05Proof

Credentials & learning.

Certifications

Education

  • MTech, Computer Science Engineering

    Nehru College of Engineering and Research Centre, Pambady

    2015 – 2017

  • Bachelor of Computer Engineering

    SAL Institute of Technology & Engineering Research

    2011 – 2015

Publications

Languages

  • EnglishNative / bilingual
  • GujaratiNative / bilingual
  • HindiNative / bilingual
  • MalayalamFull professional
  • KannadaElementary
  • MarathiElementary

06Contact

Let's build
something.

Hiring for a full-stack or backend role? I'm available immediately and ready to relocate. The fastest way to reach me is email.

sreejitsundaran@gmail.com
Request resume