Vinay Kumar
Software Development, Maintenance & IT Consultancy

Affordable Software Development & Technical Consulting for Growing Businesses

Build, improve, or maintain your web and mobile systems with an experienced software architect. Get direct access to senior engineering leadership, realistic scope definition, and transparent estimates without the overhead of full-time hiring.

11+ years total exp (8.5+ yrs industrial + 2.5+ yrs director) · 35+ systems built · Global remote consulting (New Delhi base)

Who This Service Is For

Designed for leaders who need software built right, fixed quickly, and maintained reliably.

Startup Founders & Co-Founders

Need to validate and launch an MVP quickly with senior architecture, avoiding expensive rebuilds later.

Small & Medium Business Owners

Want custom workflow automation, customer portals, or e-commerce integrations without hiring an entire IT department.

Operations & Product Managers

Struggling with slow software, unhandled bugs, unstable deployments, or technical debt from previous developers.

Engineering Managers

Need a high-level architect for security audits, OAuth/SSO implementations, cloud migration, or code reviews.

Teams Adding AI & Automation

Looking to add intelligent LLM/RAG pipelines, automated agents, or fraud detection without vanity complexity.

Fractional CTO Seekers

Teams that need part-time strategic tech leadership, vendor evaluation, and roadmap prioritization without a full-time CTO cost.

Core Commercial Capabilities

Comprehensive software engineering and consulting services backed by 8.5+ years of industrial engineering and 2.5+ years of executive directorship & management experience.

1. Build a New Product

End-to-end engineering for new software products, from initial architecture blueprint to production release.

What I Build:
  • MVP development with realistic milestones
  • High-performance web applications
  • Cross-platform mobile applications
  • Scalable REST & GraphQL APIs
  • Custom admin portals & internal tools
  • Production cloud setup (AWS/GCP/Docker)
Discuss Your Product Idea

2. Maintain & Improve Existing Software

Audit, stabilize, optimize, and maintain legacy or troubled codebases built by internal or third-party developers.

What I Solve:
  • Proactive maintenance & bug fixing
  • Latency & database query optimization
  • Security reviews & OWASP compliance
  • Cloud deployments & CI/CD automation
  • Third-party API & payment integration
  • Technical documentation & handover
Get a Technical Assessment

3. AI & Automation Services

Integrate practical AI agents and automation workflows that eliminate repetitive manual business operations.

Capabilities Included:
  • Custom LLM & RAG retrieval pipelines
  • Autonomous workflow & backoffice agents
  • Intelligent customer service bots
  • Rule-based fraud detection systems
  • Document processing & text extraction
  • Safe enterprise model governance
Explore AI Integration

4. Technical Consultancy & Architecture

Get senior technical strategy, code audit, vendor evaluation, and fractional technical leadership without full-time commitment.

Strategic Advisory:
  • Architecture reviews & scalability planning
  • Realistic MVP roadmap & budget planning
  • Technology selection & stack validation
  • Independent code & security audits
  • Engineering team mentoring & hiring advice
  • Fractional CTO & lead architect advisory
Book Technical Guidance

A Practical Process From Idea to Reliable Software

A predictable 4-step delivery path tailored to your specific scope and budget constraints.

01

Understand

I clarify your business goal, target users, current operational bottlenecks, timeline, and budget constraints.

02

Plan

I define practical scope, technical architecture, milestone priorities, and a clear, realistic delivery roadmap.

03

Build or Improve

I develop, integrate, refactor, test, and document the solution following strict modern security standards.

04

Support

I provide clean handover, post-launch maintenance, performance monitoring, and ongoing architectural guidance.

Scope Flexibility: Project scope can be calibrated to your exact budget without compromising honesty, security, or engineering quality.

Technical Skills & Tech Stack

Enterprise-grade technologies, frameworks, cloud architecture & engineering disciplines honed over 8.5+ years of production experience.

Scroll to filter domain categories

Backend & API Engineering
Microservices & Distributed Systems

High-throughput distributed systems, REST API design (versioning, pagination, validation, backward compatibility), asynchronous messaging, microservices architecture, and clean backend code.

Python Django Flask FastAPI Node.js Express NestJS TypeScript Java (JSP, Servlet) Java (Spring Boot) REST API Design API Versioning & Pagination Microservices Architecture Distributed Systems Event-Driven Architecture Asynchronous Processing Third-Party API Integrations TDD & Unit Testing WebSockets SSE REST & GraphQL PHP / Laravel
Cloud & AWS
Serverless, Containers & Cloud Architecture

Production AWS cloud architecture, containerized application deployment, serverless pipelines, event streaming, and cloud-native scalable systems.

AWS AWS ECS / EKS AWS Lambda RDS / Aurora Amazon S3 SQS / SNS MSK / Kinesis CloudWatch AWS IAM Microsoft Azure Azure Virtual Machines Azure AD B2C / Entra ID Cloud-Native Architecture Containerized Application Deployment
Infrastructure & DevOps
IaC, CI/CD & Container Orchestration

Infrastructure as Code with Terraform, automated GitHub Actions CI/CD pipelines, Docker containerization, Kubernetes orchestration, and Linux systems administration.

Terraform (IaC) Docker Kubernetes GitHub GitHub Actions CI/CD Pipelines Linux / Unix Shell Scripting Git System Design
Production Observability & Reliability
Monitoring, Tracing & High Availability

Application performance monitoring, production troubleshooting, distributed tracing, centralized logging, root cause analysis (RCA), and fault-tolerant architecture.

Datadog Prometheus Grafana CloudWatch AWS X-Ray Distributed Tracing ELK Stack / OpenSearch Centralized Logging Error Tracking (Sentry) Production Troubleshooting Root Cause Analysis (RCA) High Availability (HA) Fault-Tolerant Systems Disaster Recovery Monitoring
Databases & Data Management
SQL, NoSQL, Caching & Performance

Relational and NoSQL database modeling, query optimization, advanced indexing, distributed Redis caching, rate limiting, session locks, and message queues.

PostgreSQL MySQL MongoDB Redis Distributed Cache Rate Limiting Session Management Distributed Locks RabbitMQ Apache Kafka Database Query Optimization Indexing & Performance Tuning Data Modeling Database Migrations Sharding / Partitioning Elasticsearch
Security, IAM & Best Practices
Authentication, Authorization & Secrets

Enterprise security architectures, token authentication, role-based access control (RBAC/ABAC), secrets management, secure coding standards, and OWASP compliance.

OAuth 2.0 OpenID Connect (OIDC) JWT RBAC / ABAC AWS Secrets Manager HashiCorp Vault OWASP Top 10 Data Encryption (Rest & Transit) Secure Coding Practices SSL / TLS Authentication & Authorization Single Sign-On (SSO) MFA / 2FA Auth0
AI & Modern Engineering
LLMs, RAG, Agents & AI Workflows

Production GenAI engineering, LLM API integrations, Retrieval-Augmented Generation (RAG) pipelines, vector databases, agentic workflows, automated code review pipelines, and AI-assisted development.

LLM API Integration OpenAI Anthropic (Claude) Prompt Engineering RAG Architecture Vector Databases Pinecone pgvector Agentic Workflows Automated Code Review Pipelines GitHub Copilot Cursor Codeium ChatGPT LangChain LlamaIndex
Mobile & Enterprise Java
Android SDK, Native Java, JSP & Servlets, Spring Boot

Native Android application development and enterprise Java backend architectures. Proficient in core Java, JSP/Servlet web frameworks, MVC architectures, Android Jetpack, SQLite/Room, REST integrations, and enterprise deployment.

Android (Java) Java (JSP, Servlet) Java (Spring Boot) Android SDK Android Jetpack Activities & Fragments Services & Broadcast Receivers SQLite / Room DB Retrofit & Volley Java EE / Jakarta EE Apache Tomcat MVC Architecture JDBC / Hibernate Maven / Gradle XML Layouts & Material UI Google Play Store Deployment
Full-Stack Capabilities
Frontend, Mobile, Clean Architecture & Leadership

Full-stack product delivery with modern frontend & mobile frameworks, clean architecture principles, and agile engineering leadership.

React.js Angular JavaScript (ES6+) HTML5 / CSS3 Responsive Design Flutter React Native Android (Java) Java (JSP, Servlet) PHP (Laravel, CodeIgniter) Java (Spring Boot) Clean Architecture Hexagonal / Onion Architecture Domain-Driven Design (DDD) Agile / Scrum Sprint Planning Tech Debt Management Code Reviews Cross-Functional Collaboration Mentoring & Training MVP Roadmaps
8.5+ Years Experience
9 Core Disciplines
80+ Technologies
11+ Industry Domains

Featured Technical Case Studies

A practical look at real-world technical challenges, architectural decisions, and measurable business outcomes.

B2B • Logistics B2B Logistics & Fleet Dispatch Engine Case Study
View Case Study

FreightFlow — Enterprise Fleet & Freight Dispatch Engine

Architected an automated dispatch orchestration engine with dynamic vehicle routing algorithms, automated geofence triggers, low-power telemetry ingestion, and real-time electronic Proof of Delivery pipelines.

32% Transit Time Cut 99.4% On-Time Delivery
B2B • Real Estate & Asset ERP B2B Real Estate Portfolio Case Study
View Case Study

PropStack — Commercial Real Estate Portfolio & Lease ERP

Built a centralized B2B property ERP featuring digital lease management, automated commission distribution algorithms, tenant KYC onboarding, and maintenance SLA tracking.

65% Faster Onboarding $45M+ Lease Billed
B2B • Corporate EdTech B2B Corporate LMS Case Study
View Case Study

SkillMatrix — Enterprise Workforce LMS & Sandboxed Labs

Developed a multi-tenant corporate learning LMS with interactive sandboxed coding labs, automated SCORM-compliant grading engines, and SCIM directory synchronization.

45k+ Engineers Trained 50% Faster Upskilling
B2B • FinTech & Escrow B2B Fintech Escrow Engine Case Study
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TradeSettlr — Cross-Border Payments & Escrow Settlement Engine

Architected an ISO 20022 compliant double-entry ledger settlement engine with automated escrow hold/release workflows, FX rate locks, and webhook payout verification.

$120M+ Annual Volume < 15m Settlement Time
B2B • Enterprise SaaS & IAM Businzo Platform Case Study
View Case Study

Businzo Technologies — Multi-Tenant IAM, OAuth2 & SSO Framework

Architected an enterprise microservices solution featuring centralized OAuth2 Single Sign-On (SSO), SAML integration, Redis caching for fast session lookups, and automated audit logging.

40% Faster Onboarding 0 Security Breaches
B2B • Utility & Remittance Switch B2B Utility Bills & Remittance Switch Case Study
View Case Study

PaySwitch — High-Throughput Utility Bill Aggregator & Remittance Switch

Designed an asynchronous transaction processing switch with automatic state reconciliation, idempotent retries, distributed queue fallbacks, and real-time commission credit.

3.5M+ Monthly Txns 99.85% Success Rate
B2B • Supply Chain & Fulfillment B2B E-Commerce Supply Chain Case Study
View Case Study

StockOrchestrator — Multi-Vendor Supply Chain & Fulfillment Hub

Engineered a centralized supply chain orchestration platform featuring real-time SKU inventory reservation, dynamic tier pricing rules, automated purchase order generation, and EDI warehouse integrations.

48% Faster Fulfillment 99.9% Inventory Sync
B2B • CRM & Lead Automation B2B Multi-Tenant CRM Case Study
View Case Study

PipelineSync — Multi-Tenant Sales CRM & Automated Lead Pipeline

Constructed a multi-tenant CRM engine with visual pipeline builders, automated rule-based lead scoring and round-robin rep distribution, and automated WhatsApp/email engagement sequences.

3x Faster Response 1.2M+ Leads Processed
B2B • Fleet & Transit ERP B2B Fleet Dispatch & Transit ERP Case Study
View Case Study

FleetLine — Enterprise Fleet Dispatch & Intercity Transit Platform

Developed an enterprise fleet operating system offering automated route scheduling, driver shift optimization, corporate billing integration with automated GST invoicing, and real-time GPS telemetry ingestion.

450+ Fleet Vehicles 22% Deadhead Cut
B2C • Hyperlocal Delivery B2C Hyperlocal Delivery & Live Tracking Case Study
View Case Study

SwiftDrop — Hyperlocal On-Demand Delivery & Live Telemetry Engine

Built a resilient consumer delivery app backend with low-power MQTT telemetry streaming, Kalman filter map-matching for smooth rider tracking, and dynamic surge dispatch logic.

60k+ Daily Deliveries < 350ms Map Latency
B2C • PropTech Marketplace B2C Real Estate Property Marketplace Case Study
View Case Study

UrbanNest — Verified Residential Property Discovery Marketplace

Engineered a high-converting residential search portal featuring interactive polygon map boundaries, automated photo duplicate detection, virtual walkthrough tours, and in-app masked calling.

350k+ Monthly Seekers 92% Fake Listings Cut
B2C • EdTech & Community FullStackDost Case Study
View Case Study

FullStackDost — Interactive Learning Platform & Community

Designed and built an end-to-end interactive learning platform featuring structured courses, live coding sessions, dependable video streaming infrastructure, community discussion forums for doubt-clearing, and automated Stripe billing.

10k+ Active Learners 50+ Modules Created
B2C • Mobility & Seat Booking B2C Cab & Bus Booking Engine Case Study
View Case Study

MetroRide — Real-Time Cab Dispatch & Intercity Seat Selection Engine

Created an ultra-responsive booking engine featuring interactive SVG bus berth seat selection, atomic seat locks in Redis, instant cab driver dispatch matching, and UPI one-click checkout.

250k+ Bookings 42s Checkout Time
B2C • Table Reservation Engine Diapark Case Study
View Case Study

Diapark Table Reservation Engine

Built a real-time reservation platform using WebSockets for instant table status updates, distributed locking in Redis to ensure atomic bookings, and integration with localized payment gateways.

99.9% Booking Reliability < 100ms Sync Latency
D2C • E-Commerce & Retail D2C E-Commerce Brand Storefront Case Study
View Case Study

AuraD2C — High-Conversion Headless Storefront & Sub-Second Checkout

Engineered a headless D2C e-commerce architecture with Next.js edge rendering, sub-second single-page checkout, automated abandoned cart recovery via WhatsApp, and automated 3PL shipping carrier assignment.

+34% Cart Conversion < 800ms Page Speed
Operations • DevSecOps & AI Autonomous AI Code Reviewer Case Study
View Case Study

CodeSentinel — Autonomous PR Audit & AST Security AI Code Reviewer

Developed an autonomous AI code reviewer pipeline that hooks directly into GitHub/GitLab CI/CD, performs Abstract Syntax Tree (AST) parsing, identifies security vulnerabilities (OWASP Top 10), and posts context-aware inline code suggestions.

60% Faster PR Cycles 140+ Defects Caught
Enterprise AI • GenAI Policy & Q&A Enterprise GenAI Policy Intelligence Case Study
View Case Study

Enterprise GenAI Policy Intelligence & Semantic Document Q&A

Architected an enterprise-grade Retrieval-Augmented Generation (RAG) system with hybrid semantic/BM25 search, chunk re-ranking, source citation verification, and granular document ACL enforcement.

< 6s Query Latency 98.6% Citation Accuracy
Enterprise AI • FinTech Risk Enterprise AI Risk & Fraud Detection Case Study
View Case Study

SentinelRisk — Real-Time AI Risk & Transaction Fraud Detection Platform

Built an ultra-low latency risk assessment pipeline combining graph-based anomaly detection, machine learning behavioral scoring, and real-time Kafka event streaming with adaptive rules engine.

$18M+ Fraud Prevented < 38ms Decision Latency
Enterprise AI • Financial Extraction Financial Transaction Extraction & Reporting Case Study
View Case Study

LedgerLens — Automated Financial OCR Ledger Extraction & Statutory Reporting

Developed an intelligent document processing (IDP) platform using vision LLMs and computer vision OCR pipelines to extract tabular line items, auto-reconcile invoices against bank feeds, and generate tax-compliant XBRL/JSON reports.

85% Overhead Cut 99.2% Extraction Precision

Facing a Similar Software or Architecture Challenge?

Book a direct technical consultation to discuss your requirements. I will review your current setup and work out a practical, cost-effective solution with you.

Book a Technical Consultation

Frequently Asked Questions

Clear answers about how I work with you, scope projects, and deliver results.

I handle custom web applications, mobile applications (iOS/Android), REST/GraphQL APIs, admin dashboards, third-party integrations, and AI agent automation pipelines. Whether you need a brand-new MVP built from scratch or an enterprise platform refactored for performance, I guide the technical implementation from start to finish.

Yes. A substantial portion of my work involves taking over legacy or troubled codebases, conducting an architecture audit, fixing longstanding bugs, improving database queries, and setting up automated deployments so the application remains stable and easy to maintain.

Yes. Many of my clients are early-stage founders and growing businesses that require senior technical depth but cannot justify hiring a full-time CTO or in-house engineering director. My consulting model is structured to be affordable and budget-conscious through strict scope prioritization.

Yes. Early architectural guidance is one of the highest-ROI investments you can make. I help you evaluate technology options, define realistic MVP milestones, estimate infrastructure costs, and avoid common technical mistakes before spending heavily on development.

Yes. I provide structured post-launch maintenance plans that cover security patches, server monitoring, database performance tuning, bug fixing, and continuous feature updates based on your business priorities.

Estimates are calculated based on explicit scope requirements, architecture complexity, data integrations, and delivery urgency. An interactive scope estimator is provided on this website for initial planning, followed by a transparent, line-item proposal after our consultation.

Yes. I frequently serve as a Fractional Tech Lead or Software Architect alongside internal developers. I lead architecture reviews, establish coding standards, mentor engineers, and tackle complex core modules while your team focuses on business features.

Let’s Discuss Your Software Project

Share what you are trying to build, fix, or improve. You do not need a complete technical specification - I will help you define the next step.

I’ll review your message and reply with the most practical next step. Estimates are based on scope, complexity, and delivery requirements.

Senior Technical Partnership

Have an urgent inquiry, RFP, or prefer writing directly? I respond to all business messages within 24 business hours.

Direct Email

connect@vinaykr.in

Base Location

New Delhi, India (Available for Global Remote Consulting)

Engagement Models

Fixed-scope deliverables, monthly fractional retainers, or technical architecture sprints.

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