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Борислав Кирилов

@0007538

Senior PHP Developer at Delasport who improved delivery speed by roughly 20% by tightening sprint planning and removing blockers.

Bulgaria

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At Delasport, I led a team of six backend developers, prioritizing daily workflow and keeping work aligned with product goals. By tightening sprint planning, clarifying ownership, and removing blockers early, I improved delivery speed by roughly 20%.

As a Senior PHP Developer at Delasport, I developed high-load services for sportsbook and casino platforms using Symfony and Laravel. I also led delivery of a major sportsbook performance feature, working with product and QA to align requirements and support a stable rollout.

At Scalefocus, I developed PHP features and RESTful APIs with Laravel and Symfony. I improved performance by optimizing MySQL queries and database structures, and refactored legacy code to reduce technical debt and increase release stability.

Earlier, I worked as a Full-Stack Developer at Tobik LTD. I studied software engineering and algorithms at Plovdiv University 'Paisii Hilendarski' and completed intensive PHP backend development training at ITTalents Software Academy.

Experience

Work history, roles, and key accomplishments

Team Lead

Delasport

Aug 2023 - Sep 2026 (3 years 1 month)

Led a team of 6 backend developers, prioritizing daily workflow and ensuring alignment with product goals. Improved delivery speed by roughly 20% through tighter sprint planning and mentoring team members.

Team Leadership Sprint Planning Code Review Mentorship Backend Development

Senior PHP Developer

Delasport

May 2021 - Aug 2023 (2 years 3 months)

Developed high-load PHP services for sportsbook and casino platforms using Symfony and Laravel, focusing on scalability and reliability. Led delivery of a major sportsbook performance feature and improved backend quality through code reviews and refactoring.

Laravel MySQL Redis CI CD Code Review Refactoring PHP Symfony

PHP Developer

Scalefocus

Apr 2019 - Apr 2021 (2 years)

Developed PHP features and RESTful APIs with Laravel and Symfony, aligned with business and technical requirements. Improved application performance by optimizing MySQL queries and database structures, and refactored legacy code to reduce technical debt.

PHP Laravel Symfony REST APIs MySQL Performance Optimization Refactoring

Full-Stack Developer

Tobik LTD

Aug 2017 - Mar 2019 (1 year 7 months)

Worked as a full-stack developer, contributing to both frontend and backend development tasks.

Education

Degrees, certifications, and relevant coursework

ITTalents Software Academy

Training, PHP Backend Development

Activities and societies: Covered practical topics such as version control (Git), basic testing practices and team collaboration workflows.

Intensive PHP backend development training with focus on OOP, clean code and SOLID principles. Built several web applications from scratch, including RESTful APIs and database-backed services.

Plovdiv University 'Paisii Hilendarski'

Bachelor of Science, Mathematics & Informatics

2012 - 2016

Activities and societies: Covered core subjects such as data structures, algorithm design, discrete mathematics and programming paradigms.

BSc in Mathematics & Informatics with specialization in software engineering and algorithms. Gained solid foundations in problem-solving, logical thinking and analytical reasoning.