Ehsan Fouladi

Full Stack Web Developer

Remote

Summary

Senior Full-Stack Engineer with 8+ years building scalable distributed systems at 10K+ req/sec, 99.9% uptime. Expert in microservices architecture (Django/DRF, gRPC, Celery), OAuth2/payment systems, and DevOps infrastructure—proven track record scaling e-commerce and fintech platforms from zero to millions of operations while mentoring engineers and delivering on aggressive timelines.

Technical Proficiencies

Backend:

Python, Django, Django REST Framework (DRF), PostgreSQL, Celery, SQL optimization, asynchronous job processing.

Frontend:

React, Redux, Next.js, Tailwind CSS, Web3 (Wagmi/Viem), responsive design, state management, UI optimization.

Systems & Architecture:

Microservices architecture, gRPC/Protobuf, OAuth2/Authentication, REST APIs, API design, system design, real-time communication (WebSockets), multi-tenant architecture.

DevOps & Infrastructure:

Docker, Kubernetes, CI/CD pipelines, Prometheus/Grafana, Linux, AWS/GCP basics, observability, infrastructure automation.

Tools & Other:

Git/GitHub, Linux, Internationalization (i18n), signal processing; Certifications: CCNA, MCITP.

Professional Experience

Backend Technical Lead (Contract) — EasyLift – Elevator Service & Maintenance Platform

July 2026–Present

Collaborated with the client to define product requirements and key platform features.
Designed the backend architecture, database schema, and REST APIs.
Developed the backend using Django and Django REST Framework.
Participated in recruiting and evaluating UI/UX designers and frontend engineers.
Coordinated technical implementation across design, frontend, and backend teams.
Advised on architectural decisions to improve scalability, maintainability, and overall product quality.

Senior Back-end Developer — 7sobh.com

November 2025–April 2026

Designed and deployed scalable REST APIs with Django/DRF integrating 3+ third-party services; handled 500K+ monthly requests at sub-100ms latency, enabling seamless system interactions.
Optimized PostgreSQL queries and indexing strategy reducing critical query latency from 2.5s to 200ms; improved throughput 35% via connection pooling and caching.
Mentored 2 junior developers on Django ORM, query optimization, and API design; conducted code reviews ensuring architectural consistency.

Principal Full-Stack Engineer & Technical Lead — lenosell.ir

September 2023–June 2026

Architected and scaled microservices platform (Shop, Order, Product) from startup to 10K+ daily active users, 50K+ peak req/sec, 99.9% uptime; designed gRPC inter-service communication with protobuf contracts, implemented REST APIs with OAuth2/introspection, and enforced drf-spectacular API docs across 15+ services.
Engineered geospatial product catalog with hierarchical categories, bulk operations, S3 media storage, and variant management; optimized query latency from 800ms to 150ms via indexes and caching, driving 20% conversion rate improvement.
Built Django OAuth Toolkit authentication server and PCI-compliant payment processing system; implemented KYC/KYB and Subscription microservices with Celery async jobs; established Docker/CI-CD pipelines and observability (Prometheus/Grafana) for production reliability.
Mentored team of 4 engineers on system design patterns, led technical decisions for scaling infrastructure, and ensured zero critical incidents across all services.

Cadinuswap (Freelance Full-Stack) — cadinu.io

April 2022–August 2023

Architected and built full-stack DeFi platform serving 5,000+ active Ethereum traders; optimized React/Redux frontend performance (2.1s Lighthouse improvement) and backend async job system handling 200+ transactions/sec with zero data loss.
Implemented Web3 integration (Wagmi/Viem) with secure transaction signing and wallet connections; designed smart contract interaction patterns preventing common vulnerabilities.
Launched Next.js landing page and Strapi blog CMS; optimized content pipeline reducing deployment from 15min to 3min (30% velocity gain).

opgAI (Freelance, Full-Stack) — opgai.com

April 2022–November 2022

Architected full-stack SaaS for dental practice management (Django/DRF, React, PostgreSQL) adopted by 20+ clinics managing 5,000+ patient records; designed HIPAA-compliant multi-tenant architecture with encrypted storage, RBAC, and audit logging.
Engineered AI diagnostic module achieving 95% accuracy for tooth condition detection, reducing diagnosis time by 40% and enabling 3x daily patient throughput; designed appointment scheduling with conflict prevention and SMS/email notifications.
Delivered product on-schedule, on-budget, zero critical post-launch issues; generated 5+ client referrals.

Software Engineer (Contract, Data Systems) — Metil Hamyar

September 2021–January 2022

Designed normalized PostgreSQL model for iron-ore logistics (rail/road shipments, lab metrics) handling 100K+ monthly records; built Excel import/export workflows with validation reducing data entry errors 85% and manual reconciliation 60%.
Integrated IoT sensor network and smart monitoring systems; automated master data sync eliminating 20 hours/week manual work.
Delivered financial/operations reporting enabling 15% better cost visibility for supply chain optimization.

Education

Master of Telecommunication Engineering

2016

Yazd University (GPA 3.14)

Relevant Coursework: Speech Signal Processing, Microphone array speech processing, Speech overlap, Speaker number detection
Thesis: Source Number Detection for The Localization of Simultaneous Speakers

Bachelor of Electrical and Electronics Engineering

2013

Islamic Azad University Fars Science & Research (GPA 3.4)

Bachelor Project: SMS Caller ID

Languages & Additional

Languages: Persian (Native), English (Fluent)
Passions: System design, scalability challenges, open-source development, continuous learning in distributed systems