🚀 SENIOR SOFTWARE ENGINEER & TECHNICAL LEADER | OPEN-SOURCE AUTHOR
Hi, I’m Vahid Mardani. I am a senior software engineer, technical leader, and active open-source contributor specializing in scalable backend systems, full-stack platforms, secure APIs, and high-performance distributed architectures.I combine modern product engineering with deep systems-level expertise. That means I help clients build polished, production-ready applications while also solving the hard technical problems behind scalability, reliability, performance, and security. My technical depth is reflected in my extensive open-source portfolio, where I have authored and maintained numerous libraries spanning low-level C frameworks, Python tools, and embedded electronics.My work covers full-stack web development, backend architecture, SaaS platforms, API ecosystems, AI integrations, and security-sensitive systems. I bring deep production experience in Python, C/C++, Go, Haskell, JavaScript, distributed computing, Linux, cryptography, TLS, scalability, and SRE practices.


--- CORE OPEN-SOURCE & TECHNICAL CONTRIBUTIONS ---
PYTHON FRAMEWORKS & ECOSYSTEMS: Author of 'yhttp' (a thin, fast HTTP framework), 'bddrest' (a BDD test engine for REST APIs), and 'sqlalchemy-media' (a media asset manager extension for SQLAlchemy). I also built 'khayyam', a comprehensive Persian Jalali calendar library with full timezone and DST support.

LOW-LEVEL C SYSTEMS: Developed high-performance, asynchronous tools including 'pcaio' (a preemptive C AsyncIO framework utilizing context-switching and epoll) and 'chttp' (a fast, standard-compliant HTTP packet parser and builder in pure C).

EMBEDDED & ELECTRONICS ENGINEERING: Built concrete hardware solutions including custom firmware over-the-air (FOTA) update systems, regex-route HTTP servers for ESP8266/ESP32 microcontrollers, and specialized RTOS shells.

--- WHERE I ADD THE MOST VALUE ---
I am especially valuable on projects that need more than just standard web development—projects where the system must be stable, scalable, secure, and ready for real production use. This includes:Microservices & high-load servicesBackend redesign & architecture planningPerformance optimizationCritical infrastructure & security systemsAlongside product delivery, I bring leadership experience as a Team Lead, CTO, and technical coach. My background includes work on SIEM systems, IoT products, CDN architecture, and an offline TOTP banking security platform used in critical financial infrastructure.I care about clean architecture, clear communication, practical solutions, and dependable delivery. Whether you need a full product built from scratch, a backend platform improved, AI functionality integrated, or a complex system redesigned for scale, let's talk about how I can help your project succeed.

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✨ What I can help with
✅ Full-stack web development
✅ Backend development and system architecture
✅ API integration and custom API development
✅ AI integration, LLM tools, and RAG workflows
✅ Microservices and distributed systems
✅ Security-focused backend systems
✅ Performance optimization and high-load services
✅ SaaS platform development
✅ DevOps, reliability, and production support
✅ Internal tools, dashboards, and automation systems
✅ Linux-based infrastructure and systems engineering
✅ Technical leadership and architecture guidance

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🤝 Why clients work with me
✅ Strong balance of product engineering and deep backend expertise
✅ Clean, scalable, maintainable code
✅ Experience with security-sensitive and high-stakes systems
✅ Clear communication and technical leadership
✅ Practical architecture decisions aligned with business goals
✅ Reliable delivery from planning to production
✅ Comfortable owning both implementation and system design