Freelancer profile translated to English.
Back to original languageAbout Sergiy
About Me
I am a Symfony Backend Developer with over 7 years of experience in PHP/Symfony projects, including Mastercard Ukraine and Autoportal.com. I specialize in backend development, REST APIs, Oracle and PostgreSQL databases, RabbitMQ, and high-performance systems.
What I Can Do
I develop, maintain, and optimize backend systems, implement APIs, and manage complex integrations. I take ownership of backend modules and upgrades (Symfony 4→6, PHP 7→8.2) and ensure reliable performance.
Availability & Rate
Available for part-time projects (~10–15h/week). Platform minimum daily rate €125/day, flexible project or hourly agreements possible depending on scope.
Why Work With Me
Experience with enterprise projects
Hands-on with Symfony, PHP, REST APIs, PostgreSQL
Can develop backend modules independently
Ukrainian
Native or bilingual
English
Conversational
German
Basic
Remote only
Primarily works remotely
Experience
- SK-Soft GmbHSoftware DeveloperDIGITAL AND ITJanuary 2025 - Today (1 year and 5 months)Veitshöchheim, BY, GermanySymfony Developer with experience in Symfony 6/7, REST API integrations, and modern backend architecture.I deliver clean, maintainable code, optimize Postgres/Doctrine performance, and ensure smooth deployments using Docker and CI/CD.Worked on multiple long-term and short-term projects in e-commerce, operations, and internal tools.
- TASLinkSymfony PHP DeveloperDIGITAL AND ITAugust 2019 - December 2024 (5 years and 4 months)Kyiv, UkraineSole backend developer for a Mastercard Ukraine project.Designed and implemented the full backend from scratch using Symfony (4.x → 6.x), PHP (7.x → 8.2), Oracle DB, RabbitMQ, and Redis.Handled system architecture, secure payment workflows, high-load optimizations, and smooth framework/runtime upgrades.Delivered a stable and scalable platform that met strict corporate security and performance standards.
- HypernautSymfony PHP developerDIGITAL AND ITApril 2019 - August 2019 (4 months)Kyiv, UkraineResponsibilities:Developed and maintained backend modules using Symfony (4.x–6.x) and PHP 7→8.2.Built a custom email-sending integration using Oracle Eloqua (dedicated Symfony bundle).Implemented secure and reliable email workflows for marketing and transactional messages.Contributed to development of existing enterprise products: bug fixing, feature extensions, refactoring, performance improvements.Collaborated with cross-functional teams on architecture decisions and API integration tasks.Tech stack:Symfony, PHP 7/8, Oracle Eloqua, Oracle DB, RabbitMQ, Redis, Docker
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Education
- Bachelor's degreeNational Technical University of Ukraine 'Kyiv Polytechnic Institute'2020Bachelor's degree
- PHP DeveloperPHP-academy2017PHP Developer