Senior Software Engineer: AI Platforms & Orchestration

ARJUN RAJ

Senior Software Engineer AI Systems, Platform Architecture & Product Engineering

+91-637**-***** ********@*****.*** linkedin.com/in/arjun-raj-08499917a arjunlabs-portfolio.vercel.app Chennai SUMMARY

Senior Software Engineer with 6+ years designing AI-native platforms, intelligent business systems, and scalable backend architectures. Currently architecting BOS — a governed AI execution platform (Python/FastAPI, Redis, Celery, PostgreSQL, Keycloak) — at Onexfort, while building multi-tenant AI agent systems and payment orchestration processing 10K+ monthly transactions across 7 gateways. Independently founded and launched TradesLynk, a live B2B trade platform. Combines deep systems engineering with product ownership from architecture through production. TECHNICAL SKILLS

AI & Intelligent Systems: OpenAI (GPT-4, Vision, Function Calling), AWS Bedrock (Claude/Anthropic), LangChain, pgvector, Dialogflow, SynthFlow AI, RAG pipelines, AI agent orchestration Backend & Platform: Python (FastAPI), PHP (Laravel), Redis, Celery, PostgreSQL, MySQL, OpenSearch, REST API design, WebSockets, event-driven architecture

Cloud & Infrastructure: AWS (Bedrock, S3, Cognito, SNS, OpenSearch Service), Keycloak (IAM/OIDC), Row-Level Security, multi-tenant architecture, Docker

Payment & Fintech: Stripe (Connect, Billing, Payouts), Razorpay, PayPal, Tipalti, DPO, Payrix — payment orchestration, subscription billing, instant payouts

Frontend & Mobile: React, Angular, JavaScript/TypeScript, Ionic • DevOps: Git, Docker, CI/CD pipelines EXPERIENCE

Senior Software Engineer Onexfort India Pvt Ltd, Chennai Dec 2022 - Present BOS — Business Operating System (AI-Native Platform) Platform & Product Engineering

Full Stack Engineer ZeroSoft Technologies, Thoothukudi Aug 2020 - Nov 2022 FOUNDER & INDEPENDENT WORK

TradesLynk Founder & Lead Engineer 2026 - Present EDUCATION

BE Computer Science & Engineering Dr. Sivanthi Aditanar College of Engineering 2016 - 2020 MBA Business & Operations Management Alagappa University 2021 - 2023 Architecting a governed AI execution platform unifying workflows, operations, AI agent execution, and operational data into adaptive AI-native infrastructure replacing rigid ERP/SaaS systems.

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Designed platform architecture using FastAPI, Redis, Celery, PostgreSQL with Row-Level Security, and Keycloak for scalable multi-tenant execution.

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Building AI orchestration layer using AWS Bedrock and OpenAI for governed operational execution with audit trails and tenant-scoped permissions.

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• Designing adaptive workflow engine enabling context-aware AI-driven business automation. Architected payment orchestration layer across 7 gateways processing 10K+ monthly transactions with automated reconciliation and instant payouts.

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Built AI-native business assistant enabling operational workflow execution via natural language using OpenAI function calling, LangChain, and pgvector.

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• Developed computer vision pipeline for cubic volume estimation from uploaded images using OpenAI Vision API. Engineered multi-tenant conversational AI platform with Dialogflow, tenant-specific knowledge bases, and centralized control plane.

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• Built semantic retrieval infrastructure using PostgreSQL pgvector for AI agent memory and operational context retrieval.

• Implemented real-time systems using WebSockets/Pusher and geo-search infrastructure using OpenSearch. Delivered production systems across e-commerce, fintech, edtech, and healthtech domains with payment, subscription, and real-time architectures.

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• Designed cross-platform applications, payment workflows, and operational systems across web and mobile platforms.

• Owned end-to-end product delivery from requirements through deployment. Built and launched a B2B trade platform connecting exporters and buyers through intelligent supplier discovery and workflow automation.

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• Own product strategy, architecture, implementation, deployment, and platform evolution.

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