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I’m Leonid Sahakyan, a senior back-end developer and software architect with 20+ years of experience building scalable, high-performance web systems. I specialize in Node.js and PHP, designing robust backend architectures, REST APIs, and real-time services (including WebSockets), with strong focus on reliability, maintainability, and performance optimization. I’ve led teams and delivered end-to-end backend solutions across multiple products—founding companies, mentoring engineers, and managing infrastructure on AWS. From serverless and cloud-based architectures to database optimization and CI/CD, I enjoy turning complex requirements into clean, dependable systems that work well across international markets.…I’m Leonid Sahakyan, a senior back-end developer and software architect with 20+ years of experience building scalable, high-performance web systems. I specialize in Node.js and PHP, designing robust backend architectures, REST APIs, and real-time services (including WebSockets), with strong focus on reliability, maintainability, and performance optimization. I’ve led teams and delivered end-to-end backend solutions across multiple products—founding companies, mentoring engineers, and managing infrastructure on AWS. From serverless and cloud-based architectures to database optimization and CI/CD, I enjoy turning complex requirements into clean, dependable systems that work well across international markets.

Leonid Sahakyan

Back-End Developer, Software Engineer, Web Developer, +2

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I’m Leonid Sahakyan, a senior back-end developer and software architect with 20+ years of experience building scalable, high-performance web systems. I specialize in Node.js and PHP, designing robust backend architectures, REST APIs, and real-time services (including WebSockets), with strong focus on reliability, maintainability, and performance optimization. I’ve led teams and delivered end-to-end backend solutions across multiple products—founding companies, mentoring engineers, and managing infrastructure on AWS. From serverless and cloud-based architectures to database optimization and CI/CD, I enjoy turning complex requirements into clean, dependable systems that work well across international markets.…I’m Leonid Sahakyan, a senior back-end developer and software architect with 20+ years of experience building scalable, high-performance web systems. I specialize in Node.js and PHP, designing robust backend architectures, REST APIs, and real-time services (including WebSockets), with strong focus on reliability, maintainability, and performance optimization. I’ve led teams and delivered end-to-end backend solutions across multiple products—founding companies, mentoring engineers, and managing infrastructure on AWS. From serverless and cloud-based architectures to database optimization and CI/CD, I enjoy turning complex requirements into clean, dependable systems that work well across international markets.

Available to hire

I’m Leonid Sahakyan, a senior back-end developer and software architect with 20+ years of experience building scalable, high-performance web systems. I specialize in Node.js and PHP, designing robust backend architectures, REST APIs, and real-time services (including WebSockets), with strong focus on reliability, maintainability, and performance optimization.

I’ve led teams and delivered end-to-end backend solutions across multiple products—founding companies, mentoring engineers, and managing infrastructure on AWS. From serverless and cloud-based architectures to database optimization and CI/CD, I enjoy turning complex requirements into clean, dependable systems that work well across international markets.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Armenian

Fluent

Russian

Advanced

English

Intermediate

Work Experience

Senior Node.js Developer & Software Architect at SigmaWord

December 1, 2025 - Present

Developed and maintained backend services for a multi-market lottery management platform covering real-time draws, ticket lifecycle, risk management, and settlement reporting. Designed and implemented REST APIs and WebSocket-based services in Node.js to serve multiple international markets. Managed full AWS infrastructure, including EC2 and RDS, and planned and executed migrations from AWS to dedicated servers while managing multi-environment deployments.

Founder / CEO / Senior Back End Developer & Software Architect at Rebit.ai

May 1, 2022 - December 1, 2025

Founded a web development company and built/managed a team of 15+ designers and developers. Designed and implemented scalable backend architectures for multiple web projects using Node.js, PHP, and MySQL. Led technical development: code reviews, onboarding, technical interviews, mentoring, and guiding engineering decisions. Coordinated with clients to define requirements, propose solutions, and ensure expectations were met, with emphasis on code quality, system reliability, and performance optimization. Oversaw project delivery and maintained engineering standards across projects.

Senior Node.js Developer / Team Lead at Nomilabs

September 1, 2021 - September 1, 2022

Designed and implemented backend architecture using AWS Lambda and Node.js for scalable, reliable services. Developed scalable service components and data parsers to collect, process, and store blockchain data efficiently. Wrote automation tests and integrated them with GitHub workflows for CI/CD pipelines. Mentored and guided a small development team, reviewed code, delegated tasks, and contributed to system design, performance testing, and infrastructure planning for high-traffic applications.

Senior Node.js Developer (AWS) at occo.io

January 2, 2021 - September 1, 2021

Worked on Node.js backend development with AWS, contributing to scalable services and supporting cloud-based architectures. (Specific responsibilities were not fully detailed in the provided resume text.)

Chief Technology Officer / Senior Back-End Developer & Software Architect at ToHire

September 1, 2019 - January 1, 2021

Provided senior backend architecture and software engineering leadership across multiple projects. Focused on backend systems, APIs, and database solutions; supported product deployment and performance optimization; and coordinated with stakeholders and clients to align engineering outcomes with business goals. (Additional technical scope details were not fully specified in the provided resume text.)

Co-Founder / CTO / Senior Back-End Developer & Software Architect at SocialBet (Startup)

October 1, 2018 - September 1, 2019

Co-founded and developed backend architecture for the SocialBet startup using serverless architecture with Node.js and AWS Lambda. Built clean, scalable, and efficient code with a focus on code reviews, testing, and engineering quality across services. Led and coordinated a team of 50+ developers and specialists through code reviews, mentoring, and task delegation. Oversaw scalable, secure, high-performance systems and infrastructure, and collaborated cross-functionally with clients to deliver solutions aligned with business objectives. Designed and implemented APIs, database structures, and backend services for core application functionality, including production deployment and performance tuning.

Senior PHP Developer at Secon

September 1, 2015 - October 1, 2018

Developed and maintained a large-scale commercial product deployed across multiple servers and infrastructures. Adapted and supported duplicated product instances for different countries and regional markets. Collaborated with an international team to ensure seamless delivery and integration across variants. Wrote clean, efficient, well-documented code following modern development standards, performed code reviews and refactoring for long-term scalability and maintainability, and supported team coordination and mentoring.

Senior PHP Developer & Software Architect at Ucraft

May 1, 2014 - August 1, 2015

Designed and implemented scalable backend system components as part of the architecture team. Built clean, maintainable, and efficient backend code for platform features and services. Collaborated with cross-functional teams to define technical approaches and ensure consistent system integration. Participated in code reviews and architectural discussions to support long-term platform growth.

Senior PHP Developer at Bang2boom

May 1, 2013 - May 1, 2014

Developed commercial Joomla components and modules for client projects and internal use. Provided ongoing support for existing components, including updates, bug fixes, and community engagement. Contributed to a large-scale eCommerce platform built on Joomla, focusing on backend logic and extensibility. Collaborated with users and the Joomla community to ensure compatibility, usability, and high-quality standards.

Senior PHP Developer at InterSchoolConnect Llc. (Dasaran.am)

September 1, 2011 - February 1, 2013

Maintained and supported a legacy educational platform ensuring stability and functionality. Participated in development and successful release of a fully redesigned modern platform. Contributed to system architecture planning including database refactoring and backend structure improvements. Developed small interactive educational games and features such as messaging, activity wall, and school management tools. Documented technical processes to support future development and onboarding, and helped transition the platform from legacy code to a modern scalable system used nationwide in schools.

PHP Developer at 101World WideLabs

September 1, 2010 - February 1, 2011

Developed features for a Symfony-based PHP project as part of professional development training. Collaborated with the team lead to clarify requirements, discuss tasks, and deliver solutions. Analyzed technical documentation, implemented features, and gained hands-on experience in team workflows and collaboration.

Co-Founder / Junior PHP Developer at Kayq Studio

November 1, 2008 - August 1, 2010

Developed and maintained PHP-based web projects, contributing to backend logic and database integration. Collaborated closely with clients and team members to deliver web solutions. Assisted with code reviews and testing, learned professional workflows and best practices, and worked with senior developers to implement features and optimize system performance.