Anuj Dwivedi
Senior Backend Engineer · Payments & LLM Integrations
5+ years building production backends in Laravel/PHP and Node.js (NestJS, Express): a payment middleware processing 25K+ transactions a day, the backend of a 10M+ install app, and multi-provider LLM integrations. Contributor to Laravel's official AI SDK.
Years Commercial Exp
API Response Speedup
Payment Transactions / Day
App Installs Served
Live Interactive Cloud & Gateway Playground
Experience the actual pipeline orchestration and transactional webhook flows I design. Interact with both modules to test performance logic.
// Executing as deploy user: anuj@ci-runner
Payment Webhook Verification Sandbox
I orchestrate highly secure webhook event validation logic using cryptographic signature checks. Choose a payment rail below to test.
Enterprise Tech Stack & Expertise
A robust collection of tools, platforms, and methodologies developed through years of active production-grade coding. Select any competency tag to directly build your spec requirements.
Robust Backend
Interactive UI
Cloud & DevOps
Database & Caching
Fintech Integration
Security & Quality
Professional Work History
Designing system components, tuning database speeds, and structuring enterprise cloud routes.
Senior Software Engineer
Code Clowns Tech Solution — Kanpur- Built and maintained backend REST APIs for Ebba Tube, a platform for a Canada-based client with 10K+ users, serving web and mobile clients.
- Removed N+1 query patterns and added Redis caching on hot read paths, improving API response times by ~30%.
- Developed the backend APIs for Alifa, a dating application, from schema design to a release-ready build.
Senior Software Engineer (Contract)
Oak Tree Software Pvt Ltd — Remote- Delivered 10 backend features and REST APIs in an established Laravel/Node.js codebase.
- Mentored 2 junior developers and documented service behavior for a structured handover.
Senior Software Developer
Papaya Coders Pvt Ltd — Lucknow (promoted from Full Stack Developer)- Built the complete backend, APIs and admin panel for a Bangla calendar app with 10M+ installs and ~20K concurrent users, using Cloudflare and Redis for peak load.
- Built Ranapay, a microservice payment middleware processing 25K+ transactions a day, with central auth, payment orchestration, structured logging and caching.
- Implemented BBPS bill-payment workflows and integrated 5 payment gateways into a grocery delivery app.
- Designed a 3-provider LLM fallback chain (OpenAI, Gemini, DeepSeek) so a single provider outage no longer stopped the service.
Software Developer
Digislots Pvt Ltd — Lucknow- Developed PHP web applications and REST APIs in Laravel and CodeIgniter, including admin panels, MySQL schemas and third-party integrations for mobile apps.
- Delivered features end to end, from requirements and database design to deployment on GCP Compute Engine.
Production-Grade Case Studies
Highly stable backend architectures, open-source packages, and custom integrations active in commercial markets.
Talbros BP Portal
Developed an automated business orchestration layer linking localized warehouse systems with Microsoft Dynamics 365 Business Central endpoints. Built background queue architectures handling 10,000+ continuous item synchronizations with automatic retry buffers.
Bangla Calendar App Backend
Designed and built the complete backend, APIs and Laravel admin panel for a Bangla calendar app with 10M+ installs and ~20K concurrent users at peak, covering calendar, astrology and horoscope features. Cloudflare edge caching and Redis keep it fast under peak load.
Laravel AI SDK & Sarvam Provider
Merged fixes in laravel/ai, Laravel's official AI SDK (#1193, #1188) and docs PRs in laravel/docs. Built laravel-ai-sarvam, a Sarvam AI provider for chat, speech-to-text and text-to-speech in Indian languages, alongside 5 packages on Packagist.
Academic Foundations
M.Tech — Computer Science
2023 – 2025 · AKTU, alongside full-time workAdvanced study in high-throughput transactional scaling, complex database management algorithms, and load distribution methodologies.
B.Tech — Computer Science & Engineering
2020 – 2023 · AKTU, lateral entryUndergraduate curriculum emphasizing system structures, object-oriented concepts, runtime calculations, and database schema layouts.
Core Architectural Strengths
High Availability Routing
Configuring robust reverse proxy rules with custom Nginx config, edge caching with Cloudflare, and Docker clustering.
Fintech Routing Rules
Authoring secure payload routers handling payment gateway handshakes, microsecond event logs, and signature checks.
DB Indexes & Caches
Setting up Redis keys, partitioning tables in PostgreSQL, and tuning database memory query limits.
Continuous Pipeline Automations
Building automated runner scripts, Docker building tags, and continuous verification with GitHub action pipelines.
Ready to construct stable software?
Hiring a senior backend engineer for payments, high-traffic APIs or LLM features? Send the details and I'll reply within a day.
Interactive Inquiry Dispatch
Select key skill focuses below. The form automatically compiles a structured payload to my direct endpoint.