Hello, my name is
FAHAD HOSSAIN
And I'm

Building scalable backend systems with Node.js & TypeScript. Currently working at 6sense HQ.

Associate Software Engineer II
6sense HQ
Sept 2024 – Present

Experience

6sense HQ

Mar 2024 — Present

Associate Software Engineer II

  • Architecting and scaling AI-powered microservices using NestJS, PostgreSQL, and AWS, handling high-volume document processing and asynchronous workflows.
  • Integrated OpenAI Response API, vector embeddings (pgvector), and built intelligent pipelines for automated document analysis, structured data extraction, and AI-driven decision systems.
  • Designed compatibility/decision engines for complex business logic evaluation, improving automated investment analysis accuracy and reducing manual review time significantly.
  • Optimized inter-service communication using SQS, RabbitMQ, and EventBridge with idempotent job handling and distributed task processing.

Associate Software Engineer I

  • Developed scalable backend systems using microservice architecture, enabling high-performance communication across services using RabbitMQ and AWS SQS.
  • Built and maintained multi-tenant architectures ensuring secure, isolated environments while sharing core infrastructure efficiently.
  • Implemented CI/CD pipelines using GitHub Actions and ArgoCD, improving deployment reliability and reducing release time.
  • Improved system performance using Redis caching, background job queues, and optimized PostgreSQL queries for large-scale data workflows.

Backend Developer Intern

  • Contributed to production-grade applications built with NestJS, NextJS, MongoDB, and PostgreSQL.
  • Developed and maintained RESTful APIs ensuring secure data handling and seamless frontend-backend integration.
  • Resolved critical bugs, refactored legacy modules, and wrote unit test cases using Jest to improve reliability and maintainability.
  • Gained hands-on experience with real-world deployment workflows and collaborative development in agile environments.

Projects

JeterAI

AI compatibility & dating platform

  • Engineered an AI-driven compatibility engine leveraging OpenAI Response API and vector embeddings (pgvector) for deep personality and preference-based matchmaking.
  • Designed semantic similarity pipelines for profile matching using embedding search and custom scoring algorithms.
  • Built complex decision logic combining AI inference, rule-based evaluation, and weighted compatibility scoring.
  • Implemented scalable microservices with asynchronous job queues and distributed processing for real-time matchmaking.
  • Optimized PostgreSQL and vector indexes for high-performance similarity search at scale.

HTV

AI venture capital & deal management

  • Architected a venture capital platform for automated deal processing, evaluation, and AI-powered investment analysis.
  • Integrated OpenAI Response API, AI agents, and vector embeddings for document parsing, business plan analysis, and structured data extraction (~95% precision).
  • Designed asynchronous workflows with AWS SQS and EventBridge for distributed document processing and background orchestration.
  • Built a Turborepo monorepo with shared packages, cutting build times by ~40% and improving cross-service maintainability.
  • Deployed cloud-native infrastructure on AWS (S3, EC2, SQS, EventBridge) for high availability and horizontal scale.

Reelsync

Multi-tenant video production SaaS

  • Developed a scalable multi-tenant SaaS for video teams: workflows, collaboration, clients, and payments.
  • Designed tenant-isolated architecture with secure data segregation and shared core infrastructure.
  • Implemented advanced RBAC with granular role-permission control across organizations.
  • Built a Kanban workflow engine with task dependencies, timelines, collaborators, and customizable templates.
  • Integrated Stripe, Zoho invoicing, and Twilio for billing and real-time notifications.

Pattern50

Document management & dev workflow

  • Analyzed requirements, designed, and implemented a scalable database and core features, coordinating with frontend and QA for integration and deployment.
  • Developed backend services with NestJS, TypeScript, MongoDB, and Redis for performance.
  • Established reliable microservice communication using RabbitMQ in a decoupled architecture.

Skills

  • Languages

    C++ JavaScript TypeScript Python SQL Bash
  • Backend

    Node.js Express NestJS RabbitMQ BullMQ REST APIs
  • Frontend

    Next.js React Tailwind CSS Responsive UI State & API integration
  • Databases

    PostgreSQL MongoDB Redis VectorDB
  • DevOps & Cloud

    Git & GitHub GitHub Actions Docker ArgoCD YAML Jenkins AWS (S3 / SQS / EC2 / ECS/ Fargate etc)
  • architecture

    Monolith Microservices Decoupled Architecture Event-driven Architecture API Gateway Serverless Architecture
  • AI & Engineering

    Retrieval Augmented Generation (RAG) Vector Embeddings Prompt Engineering Model Context Protocol (MCP) LLM API Integration Agentic Systems
  • Soft Skills

    Problem Solving Communication Teamwork Time Management Adaptability

Contact

Open to new opportunities and collaborations.
Reach out via LinkedIn or email.