I’m a Senior Backend Engineer with 10+ years of experience designing, building, and maintaining backend applications, APIs, and database-driven systems.

My core strengths are backend architecture, database engineering, SQL optimization, and production troubleshooting. I focus on building reliable, secure, and maintainable systems that support business requirements and long-term product growth.

Technical Expertise

• Backend Development: PHP, Laravel, Python, Django, C#, ASP.NET MVC, RESTful APIs

• Databases: MariaDB, MySQL, PostgreSQL, SQL Server

• Database Engineering: Data modeling, schema design, indexing, query optimization, stored procedures, database administration, backup and recovery

• Infrastructure & Tools: Linux, Docker, Git, Redis

• Engineering Practices: OOP, SOLID, design patterns, automated testing, code reviews, technical documentation

As the Founder & Lead Software Engineer of a SaaS product currently in stealth development, I lead technical decisions across architecture, backend development, database design, infrastructure, deployment, security, and performance optimization.

Previously, I worked as a Senior Backend Engineer on software solutions for restaurant and takeaway businesses, including point-of-sale systems, online ordering, kiosks, accounting, and business management. My experience also includes independently delivering web applications across the full software development lifecycle.

Beyond implementation, I enjoy investigating complex technical problems, improving system and database performance, designing maintainable architectures, and collaborating with teams to turn business requirements into practical engineering solutions.

I’m interested in Senior Backend Engineering, Database Engineering, SaaS product development, and technical leadership opportunities.

Top skills

Backend Development SQL Database Administration

hamid's top skills

Backend Development

Founder & Lead Software Engineer at SaaS Stealth Startup

Senior Backend Engineer at Stealth Startup

Full-Stack Web Developer at Independent Software Developer

SQL

Founder & Lead Software Engineer at SaaS Stealth Startup

Senior Backend Engineer at Stealth Startup

Database Administration

Founder & Lead Software Engineer at SaaS Stealth Startup

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Experience

Founder & Lead Software Engineer

SaaS Stealth Startup Self-employed

Marand, East Azerbaijan Province, Iran On-site

Founded and lead the technical development of a SaaS product currently in stealth development, with responsibility for architecture, backend engineering, database design, infrastructure, deployment, and ongoing optimization.

Key Responsibilities

• Designed and developed the platform architecture, backend services, and RESTful APIs using PHP and Laravel.

• Designed and administered MariaDB databases, including data modeling, schema design, indexing, access control, data integrity, backup, and recovery.

• Optimized complex SQL queries, stored procedures, views, and indexes to investigate bottlenecks and improve database performance.

• Implemented Redis for caching and faster data access, and used Neo4j to support relationship-based data modeling and product features.

• Managed Linux-based environments and Docker workflows, and established Git-based development practices using GitHub.

• Applied OOP, SOLID principles, design patterns, automated testing, and technical documentation to support maintainability and code quality.

• Led technical research, architecture decisions, security reviews, troubleshooting, and deployment activities.

• Planned product development using Agile/Scrum practices, balancing technical priorities with product requirements.

Scope: End-to-end technical ownership across backend development, database engineering, infrastructure, and product delivery.

• Designed and administered MariaDB databases, including data modeling, schema design, indexing, access control, data…

Senior Backend Engineer

Stealth Startup Full-time

Tabriz, East Azerbaijan Province, Iran On-site

Worked as a Senior Backend Engineer / Full-Stack Developer on an all-in-one EPOS platform for takeaway and restaurant businesses. The platform integrates point-of-sale (POS), online ordering, branded websites, mobile apps, self-service kiosks, accounting, and business management tools, helping businesses streamline operations, reduce overhead costs, and manage orders through integrated, commission-free online ordering solutions.

Key Responsibilities

• Developed and maintained backend applications using C#, ASP.NET MVC, SQL Server, stored procedures, and Git.

• Led the development of a major web application over approximately 1.5 years, contributing to requirements analysis, technical design, implementation, testing, deployment, and ongoing maintenance.

• Enhanced kiosk application functionality by refactoring backend components, implementing missing features, resolving defects, and improving application reliability.

• Developed and optimized SQL queries and stored procedures, investigated database performance bottlenecks, and collaborated with the DBA on database design and optimization decisions.

• Performed code reviews, debugging, and refactoring to improve code quality, maintainability, and application stability.

• Collaborated with UI/UX and Support teams to translate business requirements and customer feedback into practical technical solutions.

• Coordinated development tasks, contributed to technical problem-solving, and prepared documentation for application features, workflows, and technical processes.

• Collaborated with Python developers on automation initiatives and provided technical support to the mobile development team when required.

• Led the development of a major web application over approximately 1.5 years, contributing to requirements analysis…

Full-Stack Web Developer

Independent Software Developer Self-employed

Marand, East Azerbaijan Province, Iran Remote

Worked independently with clients to design, develop, deploy, and maintain custom web applications throughout the full software development lifecycle.

• Designed and developed web applications using PHP, Laravel, MariaDB, and MySQL.

• Designed database schemas and optimized SQL queries for performance, reliability, and maintainability.

• Developed RESTful APIs and integrated applications with third-party services and external systems.

• Built responsive user interfaces using HTML5, CSS, Bootstrap, JavaScript, and jQuery.

• Managed requirements gathering, system design, development, testing, deployment, troubleshooting, and ongoing maintenance.

• Implemented authentication, role-based access control, input validation, and other application security measures.

• Used Git, and GitHub for version control, and applied testing, debugging, and refactoring practices.

• Worked directly with clients to clarify requirements, manage scope changes, document solutions, and provide technical support and user training.

• Built responsive user interfaces using…

Education

Islamic Azad University of Marand

Bachelor's degree, Computer Software Engineering

September 2011 – August 2013

During my Bachelor's degree at Islamic Azad University, Marand Branch, I developed a solid foundation in computer science, software development, and computer systems.

My academic coursework included Computer Graphics, Machine Language and Assembly Programming, Operating Systems, Internet Engineering, Advanced Programming with C#, Algorithm Design, System Programming, Computer Architecture, Artificial Intelligence, Database Development, Software Engineering, Web Page Design, and Special Topics in Computer Science.

These courses helped me build a strong understanding of programming concepts, algorithmic problem-solving, database design, web development, operating systems, and software engineering principles. They also strengthened my analytical thinking and technical problem-solving skills, providing a foundation for further growth in software development and computer science.

International Islamic Azad University of Jolfa

Associate's degree, Computer Software Engineering

September 2008 – February 2011

During my Associate Degree at Islamic Azad University, Jolfa Branch, I developed a solid foundation in computer science, programming, and computer systems.

My coursework included Data Structures, Fundamentals of Electronics, Computer Hardware, Web-Based Programming, Machine Language and Assembly, Database Systems, Computer Graphics, Computer Networks, Information Storage and Retrieval, Advanced C++ Programming, Software Engineering Fundamentals, Computer Fundamentals and Programming, Visual Basic, Operating Systems, and Special Topics in Computer Science.

These courses strengthened my knowledge of programming, object-oriented concepts, database management, web development, networking, hardware, and operating systems. They also enhanced my analytical thinking and problem-solving skills, providing a strong foundation for further studies and professional growth in software development and computer science.

Projects

Bootstrap-RTL

Bootstrap-rtl (archive)

https://hamidheidarinia.github.io/bootstrap-rtl/

An RTL (right-to-left) adaptation of the Bootstrap front-end framework, enabling Persian and Arabic interfaces with Bootstrap's grid, components, and utilities. Maintained across multiple Bootstrap versions (v4.0 to v4.3), with documentation hosted on GitHub Pages.

Languages

Azerbaijani

Native or bilingual proficiency

Persian

Native or bilingual proficiency

English

Limited working proficiency

Turkish

Elementary proficiency