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I'm a software engineer turned tech leader with over a decade of experience building and scaling products from the ground up. I've grown from hands-on engineering roles to designing complex systems, leading teams, and launching my own venture in a completely new domain. I've driven cross-functional collaboration, improved delivery velocity, and aligned technical execution with company goals. My journey spans full-stack development, platform architecture, and leadership across multiple teams and projects, always with a focus on impactful, measurable outcomes.…I'm a software engineer turned tech leader with over a decade of experience building and scaling products from the ground up. I've grown from hands-on engineering roles to designing complex systems, leading teams, and launching my own venture in a completely new domain. I've driven cross-functional collaboration, improved delivery velocity, and aligned technical execution with company goals. My journey spans full-stack development, platform architecture, and leadership across multiple teams and projects, always with a focus on impactful, measurable outcomes.

Andrey Andreyev

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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I'm a software engineer turned tech leader with over a decade of experience building and scaling products from the ground up. I've grown from hands-on engineering roles to designing complex systems, leading teams, and launching my own venture in a completely new domain. I've driven cross-functional collaboration, improved delivery velocity, and aligned technical execution with company goals. My journey spans full-stack development, platform architecture, and leadership across multiple teams and projects, always with a focus on impactful, measurable outcomes.…I'm a software engineer turned tech leader with over a decade of experience building and scaling products from the ground up. I've grown from hands-on engineering roles to designing complex systems, leading teams, and launching my own venture in a completely new domain. I've driven cross-functional collaboration, improved delivery velocity, and aligned technical execution with company goals. My journey spans full-stack development, platform architecture, and leadership across multiple teams and projects, always with a focus on impactful, measurable outcomes.

Available to hire

I’m a software engineer turned tech leader with over a decade of experience building and scaling products from the ground up. I’ve grown from hands-on engineering roles to designing complex systems, leading teams, and launching my own venture in a completely new domain.

I’ve driven cross-functional collaboration, improved delivery velocity, and aligned technical execution with company goals. My journey spans full-stack development, platform architecture, and leadership across multiple teams and projects, always with a focus on impactful, measurable outcomes.

Skills

Experience Level

Expert

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Expert

Expert

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Expert

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Expert

Expert

Expert

Expert

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Expert

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Expert

Intermediate

Language

Bulgarian

Fluent

English

Fluent

Work Experience

Founder at Efficient Energy Bulgaria

April 1, 2024 - April 15, 2025

Motivated by a desire to work on something impactful, I founded a company focused on helping businesses optimize their energy consumption. I independently entered a new domain, quickly acquired practical knowledge, and combined it with my technical background to design and implement complex hardware systems. - Founded and ran a bootstrapped company focused on reducing electricity waste through real-time monitoring hardware and cloud- based analytics. - Navigated a completely new domain—energy optimization—by self-learning electrical fundamentals and becoming a certified ENCO consultant. - Oversaw end-to-end operations: sourcing hardware, managing installations with electrical engineers, and ensuring data accuracy in field deployments. - Collaborated with commercial clients to analyze energy usage, identify savings opportunities, and present insights through custom dashboards.

Engineering Manager at OfficeRnD

May 1, 2023 - April 1, 2024

After serving as a Technical Lead, I moved into a full-time people management role, overseeing two engineering teams. My focus shifted to growing engineers, enabling teams to deliver consistently, and aligning technical execution with company goals. - Managed two cross-functional teams (backend, frontend, QA), focusing on team performance, career development, and delivery velocity. - Partnered with product, design, and senior leadership to align roadmaps, define scopes, and drive efficient sprint planning and backlog prioritization. - Improved engineering processes around estimation, release cycles, and cross-team collaboration. - Supported hiring and onboarding efforts, reported on team health and metrics, and acted as a bridge between technical teams and broader business stakeholders.

Technical Lead at OfficeRnD

June 1, 2020 - May 1, 2023

After years as a senior/principal engineer, I transitioned into the Technical Lead role, where I took on responsibility for the technical direction and delivery across multiple teams. I helped scale the engineering organization ensuring cross-team alignment and supporting engineers through mentorship. I also served as main contact for customer facing teams as well as product and leadership teams when technical advice was needed. - Acted as a bridge between engineering, product, and design, translating business needs into scalable solutions and helping define technical scopes across teams. - Facilitated cross-team architectural decisions, unblocked engineering efforts, and improved delivery through epic breakdowns, contract definitions, and critical code reviews. - Continued hands-on contributions in complex domains like bookings, eCommerce workflows, and large-scale data migrations, while supporting incident response efforts. - Led engineering process improvements including the migration to GitHub Actions, CI/CD unification, legacy modules refactoring, and enhanced team collaboration via regular syncs and retros.

Principal Software Engineer at OfficeRnD

November 1, 2017 - June 1, 2020

As the company scaled, I transitioned into the Principal Software Engineer role, helping grow the engineering team and mature the platform architecture as the platform itself and the customer base evolved. - Mentored new engineers, led onboarding efforts, and organized internal knowledge-sharing to accelerate team ramp-up. - Led development of complex third-party integrations (15+ payment providers, 4+ door access systems, CRM, and accounting), and co-built the platform’s public API. - Spearheaded platform-wide improvements like migrating to TypeScript, adding Redis for caching, and implementing WebSockets for real-time features. - Contributed to platform observability and reliability by utilising Grafana and the ELK stack, implemented background workers for offloading intensive operations off the main process, and taking on SRE responsibilities when needed.

Senior Software Engineer at OfficeRnD

May 1, 2016 - November 1, 2017

Part of the team since “Day 2,” having joined just months after the company was founded. During the first year, I worked closely with the two founders (both developers) to lay the groundwork for a platform that would eventually serve thousands of users globally. - Played a key role in bootstrapping the Flex Platform, helping lay its scalable architecture and core foundations. - Co-developed a custom Node.js API framework and built the identity, authentication, and authorization services with support for multi- tenancy and OAuth2. - Designed a robust integration layer for external systems (accounting, payments, door access, etc.). - Helped establish a modular, cloud-native architecture using Docker, AWS, and GitLab CI/CD for scalable, maintainable delivery.

Senior Software Engineer (Platform Analytics Division) at Telerik

April 1, 2014 - May 15, 2016

Later, I joined the Telerik Platform Analytics team, where I worked on a large-scale analytics solution providing insights into usage patterns of web and mobile applications. I contributed across the stack—using AngularJS and jQuery on the frontend, ASP.NET on the backend, and SQL for data storage—while also managing build automation with Grunt and Jenkins. This period helped me develop a deep understanding of end-to-end systems, scalability, and product-driven engineering. C# · .NET Framework · SQL · AngularJS · jQuery · Kendo Ui · jQuery UI · ASP.NET MVC · Web Development · HTML · Cascading Style Sheets (CSS) · Analytics

Senior Software Engineer (Internal Systems Division) at Telerik

March 1, 2013 - April 1, 2014

I then transitioned to an internal product team where I worked on a WPF-based HR and management application backed by a WCF service layer and SQL database. This role marked my shift into full-stack development and exposed me to stakeholder collaboration and building complete end-to-end solutions deployed on-premise. Windows Presentation Foundation (WPF) · .NET Framework · Scrum · Agile Methodologies · Windows Communication Foundation (WCF) · SQL · Human Resources Information Systems (HRIS) · Visual Studio

Junior -> Senior Software Engineer (Developer Tools Division) at Telerik

January 1, 2010 - March 1, 2013

Began my software development career in the Developer Tools division at Telerik, where I grew from a junior engineer into a senior contributor. Working on WPF and Silverlight control suites taught me the fundamentals of building reusable, high-quality software used by thousands of developers worldwide. C# · TFS · Windows Presentation Foundation (WPF) · Silverlight · Test Automation · Visual Studio · .NET Framework · Developer Tools · Agile Methodologies · Scrum