Direct access to Abin S Chandran — Freelance Software Developer & Solution Architect for scalable Next.js web applications, SaaS products, Node.js REST APIs, cross-platform Flutter mobile apps, and enterprise AI/RAG systems. One technical owner from discovery to deployment with zero agency overhead.
Abin S Chandran
Freelance Software Developer
End-to-end full-stack web application development, Node.js backend engineering, React & Next.js frontend development, SaaS platforms, and custom admin dashboards for startups and businesses.
Production-ready AI integrations, Retrieval-Augmented Generation (RAG) search, document intelligence, and secure LLM workflows for modern web apps and SaaS.
High-performance custom web application and website development with Next.js 15, React, Node.js, and PostgreSQL for modern businesses.
Cross-platform iOS and Android mobile app development with Flutter, Dart, clean architecture, and seamless Node.js backend integration.
End-to-end custom web and mobile application engineering from database architecture and REST APIs to responsive React/Next.js and Flutter frontends.
Scalable microservices, asynchronous event processors, and high-concurrency Node.js backend systems built for reliability.
Blazing-fast, SEO-optimized, pixel-perfect user interfaces with modern React 19, Next.js App Router, and Tailwind CSS.
Let's evaluate your requirements, technical stack, and timeline.
Inspect how data flows through edge proxies, auth checks, gRPC microservices, event streams, and database caching.
Evaluates dynamic path routing, tenant quotas, and applies sliding window rate-limiting rules.
Grouped across system architecture, high-concurrency backends, modern frontend engineering, cloud infrastructure, and databases.
Integrating Generative AI models, vector search, RAG pipelines, and automated LLM workflows into web and mobile products.
Production Impact: Connecting frontier LLM models with structured JSON mode and function calling
Production Impact: Architecting multi-step autonomous AI agents, tool calling, and prompt pipelines
Production Impact: Building semantic search & retrieval-augmented generation pipelines on PostgreSQL pgvector
Production Impact: Embedding real-time AI streaming, intelligent search, and dynamic summaries into Next.js & Flutter apps
Quantifiable engineering impact across cloud infrastructure, backend throughput, and full-stack software delivery.
In-depth architectural breakdowns, performance trade-offs, and metrics for enterprise applications.
Semantic Search Engine over 10M+ Enterprise Documents with Granular RBAC
Engineered an enterprise Retrieval-Augmented Generation (RAG) platform incorporating hybrid dense-sparse vector search, streaming LLM responses, and document-level permission enforcement.
End-to-End Flutter iOS & Android App with Node.js REST API Backend
Built a high-performance cross-platform Flutter mobile app for iOS and Android, backed by a Node.js Express REST API, PostgreSQL database, JWT authentication, and automated Stripe subscription billing.
Deep-dive architectural breakdowns on Flutter performance, low-latency Node.js REST APIs, and Next.js 15 App Router engineering.
Engineering 60fps Flutter applications requires careful widget rebuilding control, isolate thread offloading, and effective local caching with Hive. Here is how I structure enterprise Flutter apps.
Scaling a Node.js backend requires more than basic Express routes. Learn how connection pooling, Redis query caching, rate limiting, and centralized error handling power production APIs.
Next.js 15 brings powerful Server Components, Server Actions, and enhanced caching controls. Explore how to build clean, fast, SEO-friendly SaaS web applications.
5+ years of continuous engineering evolution, leadership, and system scale.
Spearheading multi-region cloud infrastructure, microservice migrations, and AI Knowledge Mesh platforms for global clients.
Architected Envoy API Gateway processing 50k+ RPS with sub-8ms P99 routing latency.
Designed Enterprise RAG pipeline supporting 10M+ vectorized legal documents with RBAC security.
Reduced infrastructure costs by 35% across AWS Kubernetes environments.
Direct feedback from founders, CTOs, and engineering leaders who have partnered with Abin S Chandran across SaaS MVPs, fintech engines, and mobile products.
“Abin re-engineered our daily reconciliation batch processor from the ground up. He implemented row-level pessimistic locking and idempotent ledger events that completely stopped duplicate ledger postings during bank network timeouts. Working directly with him saved us months of coordination overhead.”
“We needed a production RAG system that respected document-level access permissions. Abin designed a hybrid vector and keyword search pipeline in PostgreSQL using pgvector, complete with citation chunking and guardrails. He delivered clean code, thorough documentation, and met every milestone ahead of schedule.”
“Abin delivered our Flutter cross-platform mobile app for iOS and Android on an aggressive 8-week timeline. The offline-first SQLite sync engine he built allowed field technicians to log jobs in remote basements without cell signal and sync seamlessly once reconnected.”
Common questions about hiring me for freelance software development, tech stack, remote collaboration across India & worldwide, and project estimation.
I specialize in full-stack web applications, SaaS platforms, Node.js & Express REST APIs, React and Next.js frontends, custom admin dashboards, third-party API integrations, and database performance optimization for startups, small businesses, and growing digital brands.
Whether you need a full-stack web app, a Node.js REST API, a Next.js SaaS MVP, an admin dashboard, or performance optimization for an existing application — I am available for freelance projects in Kerala, India, and worldwide.
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