concept-x
Backend Developer
Jun 2025 - current
- Architected a scalable geolocation-based social media platform using Node.js (NestJS) and Golang(Gin), integrating an API Gateway and event-driven orchestration via RabbitMQ and NATS for inter-service communication.
- Engineered a high-performance geospatial engine utilizing PostGIS for dynamic geofencing and Redis GeoHash to achieve sub-millisecond proximity searches.
- Developed a real-time chat system with Socket.IO, implementing message synchronization, delivery acknowledgments, and a hybrid MongoDB/Redis storage architecture.
- Built a secure wallet and subscription service, ensuring ACID compliance and data durability through PostgreSQL atomic transactions for billing, tax generation, and discount management.
- Technologies: Nodejs(Nestjs), Golang(gin) RabbitMQ, NATS,, PostGIS, Redis, Socket.IO, MongoDB,
- PostgreSQL
blueOak (sitad)
Backend Developer
Feb 2025 - June 2025
- Developed a Digital Identity & Data Security platform, integrating a PDF signing engine with digital signature verification and complex state management for enhanced security.
- Engineered a Video Steganography tool in Golang for covert data injection and retrieval within video files.
- Implemented a configurable authentication system integrating OAuth 2.0 and Google Sign-In, with optional 2FA via email, SMS, and TOTP based on user preference.
- Architected and implemented a centralized authorization/permissions system backed by a materialized read model with Redis caching, improving consistency and reducing latency for access checks..
- Technologies: Nodejs, Golang, PostgreSQL (PSQL), MongoDB, Redis, FFmpeg, RSA-2048, WebRTC,
- LiveKit, OAuth
Kaman.Inc (Arcadian.ai)
Backend Developer
Dec 2023 - Feb 2025
- Developer on the Arcadian VSaaS Platform, managing 40+ microservices (200k+ LOC) within a Monorepo, driving 60% of company profit and handling 30% of operational workload.
Scaled the Mobinio service to support 3,000+ enterprise customers and 100,000+ active cameras, leveraging NATS and gRPC for event-driven communication. - Architected a high-performance backend using uWebSockets, achieving 300% faster throughput compared to NestJS.
- Developed a real-time video processing pipeline in Golang, integrating stream engines and decoders with WebSocket patterns for efficient frame delivery, and created an Edge-to-Cloud Gateway for local camera integration.
- Developed Bridge, a device framework for cloud-based camera streaming with network loss handling and resource management.
Designed a comprehensive security system with OAuth2 and Hierarchical RBAC for advanced access - control.
Part.Ai
Backend developer
Sep 2021 - Nov 2023
- Led backend development for Farashanesa’s AI-powered Auth service, handling 40M+ requests and 1M+ face detections monthly.
- Developed Danabot backend for a large-scale LLM chatbot deployed at companies like Asiatech, integrating high-performance APIs, NLP services, and data pipelines.
- Contributed to Avasho Avanegar’s market-leading text-to-speech and speech-to-text service.
- Developed and maintained CI/CD pipelines for integration testing, unit testing, and linting to ensure code quality and smooth deployments.
- Technologies: Express.js, NestJS, RabbitMQ, PostgreSQL, BullMq, Redis, JWT, and Socket.io.
rahakar hooshmand iranian
FullStack Developer
sep 2020 - sep 2021
- Developed and delivered WordPress solutions for clients, including blogs, WooCommerce e-commerce platforms, and fully custom websites.
- Built highly customizable WordPress themes utilizing core PHP, JavaScript, and front-end
- technologies.
- Custom PHP Development: Built and managed custom PHP plugins, boosting site performance by
- 20% and efficiently managing modules with Composer.