Alexey A. Buldyk

Worked closely with the feature delivery team responsible for the core software monolith, collaborating with Business Analyst and QA engineers to deliver technical improvements driven by architectural constraints, without disrupting existing business workflows.

Areas of Responsibility:

• Authorization and access control design
• Backend architecture and code quality improvement
• Refactoring and technical debt reduction
• Agent-augmented development practices

Key Contributions:

• Redesigned the authorization layer from a role-driven approach to a permission-based model leveraging Symfony Security Core. Limited roles to a foundational level, introduced fine-grained access control via custom voters, and implemented secure user impersonation.
• Integrated reusable Symfony components to standardize and strengthen the backend architecture.
• Refactored legacy modules in alignment with SOLID principles to improve maintainability and extensibility.
• Enriched the project’s dependency injection usage by leveraging Symfony DI more systematically across services.
• Connected Symfony Form to the DI container, enabling form types to operate with container-managed services comparable to the Symfony Framework behavior.
• Bridged Event Dispatcher and DI container, ensuring fully container-managed event handling.
• Leveraged Symfony’s ResetInterface (symfony/service-contracts) to manage stateful services, ensuring predictable lifecycle behavior and improved state consistency.
• Played a key role in the development and launch of a new analytical module that replaced a legacy internal implementation restricted by limited extensibility and reuse.
• Developed custom Psalm extensions to support container cache file specifics and handle non-obvious method invocations.

Achievements:

• Reduced architectural complexity and strengthened long-term maintainability.
• Increased flexibility and scalability of the permission system.
• Established a more granular and secure authorization model.
• Improved service lifecycle management and reduced side effects in stateful components.
• Elevated overall architectural maturity through deeper adoption of Symfony core components.
• Removed unmaintained dependencies to unblock version upgrades of the remaining ecosystem and ensure long-term maintainability.
• Improved static analysis coverage by adapting Psalm to project-specific architectural patterns.

Technologies used:

• Symfony
• composer
• DI
• SOLID
• PHPUnit
• PHP CS Fixer
• Psalm
• junie
• codex

Independently developed new business-driven services built on Symfony.

Areas of Responsibility:

• Developing a RESTful API built with Symfony and API Platform using an alternative ORM approach.
• Stabilizing internal BI service for extracting business events and metrics from service logs.

Key Contributions:

• Fast prototyping and development of a RESTful API service based on Symfony and API Platform
• Designing and maintaining an alternative ORM integration (Cycle ORM instead of Doctrine).
• Organizing event collection from multi-vendor Kubernetes clusters and bare-metal environments.
• Forwarding Google Cloud Pub/Sub subscription events and implementing Vector as an agent to collect and forward logs from nodes outside the GKE ecosystem.
• AI assisted prototyping a Rust microservice to enrich event pipelines with infrastructure metadata.
• Implementing fallback behaviour to collect docker logs for local development purposes.
• Integrating Grafana for metrics visualization and incident alerting.
• Configuring database retention policies for efficient long-term metric storage.

Achievements:

• Built and productionized a fault-tolerant BI platform
• Implemented proactive incident notifications based on non-obvious business metric anomalies
• Increased efficiency and resilience of the distributed metrics processing pipeline.
• Enhanced operational visibility across distributed infrastructure

Technologies used:

• Symfony
• API Platform
• Cycle ORM
• Kubernetes
• GKE
• OVH
• Docker
• Grafana
• TimescaleDB
• Vector
• RabbitMQ
• Rust
• Prompting

Worked in a dedicated team for a single enterprise client.

Areas of Responsibility:

• Maintained a high‑load legacy monolith that processed live data streams 24/7.
• Supported designers and frontend devs by adding backend hooks for a continuous UI redesign.
• Balanced workload across worker processes and message queues to keep throughput stable.
• Delivered both business features and infrastructure tasks.
• Automated server setup and deployments with Ansible.
• Containerised services with Docker for easier rollout.
• Stored and queried big data in ClickHouse.
• Wrote unit tests to safeguard quality as traffic kept growing.

Key Contributions:

• Migrated key-value storage and cached data from Memcached to Redis with zero downtime using a dual-write approach.
• Separated parts of the monolith into independent services to reduce coupling and improve system modularity.
• Refactored critical modules to boost performance, readability, and test coverage.
• Built new Symfony‑based microservices to replace and extend monolithic functionality.

Technologies used:

• RabbitMQ
• Ansible
• Memcache
• Redis
• Docker
• ClickHouse
• MySQL
• PostgreSQL
• Jenkins
• Bitbucket
• PHPUnit

Worked in an international, distributed team for a major client.

Areas of Responsibility:

• Supported a sharded architecture split by market; processed gigabytes of data in batch jobs.
• Followed Scrum methodology and helped each sprint finish on time.
• Communicated daily and weekly with the PO, PM, QA, Dev, DevOps, Delivery, Scrum Master, and BI teams.

Achievements:

• Led the phased upgrade of a large legacy codebase. Updated vendor libraries, refactored key modules, and optimized performance.
• Introduced Composer to stop storing vendor libraries in the repo and simplify dependency management.
• Built a high‑load service that mass‑publishes ads and integrates with third‑party APIs.
• Tuned database queries and indexes to avoid locks and keep performance high.

Technologies used:

• Symfony3
• GitHub
• Google AdWords API
• Bing Ads API
• REST
• SOAP
• Scrum
• PHP
• MySQL

Started as a full-stack developer working on internal Drupal-based projects, delivering numerous custom, one-off solutions that strengthened practical architecture and problem-solving skills. Later transitioned to backend development with Symfony2, building web services (SOAP/REST) for large international clients. Collaborated directly with English-speaking stakeholders, worked within enterprise workflows using Jira and Jenkins, and gained experience in structured large-scale engineering environments.

Technologies used:

• Git
• Symfony2
• SOAP
• REST
• PHP
• MySQL
• PostgreSQL
• JIRA
• Jenkins
• Mercurial

Worked as a PHP Developer/Webmasterin a web studio within a role-based team structure, contributing to multiple client projects built on a proprietary PHP/PostgreSQL framework. The architecture combined application-level PHP with business logic distributed across PL/pgSQL stored procedures, triggers, and database-layer optimizations. Developed and maintained websites of varying complexity, implemented performance improvements through denormalization techniques, and collaborated within a structured development process using version control. Also led selected projects independently, taking full ownership from development to delivery.

Technologies used:

• SVN
• PostgreSQL
• PHP
• HTML
• CSS

Worked as a remote Software Engineer, developing a high-load PHP-based mass mailing system with parallel processing and optimized memory usage. Implemented database-driven load balancing, integrated payment gateways into e-commerce platforms, and expanded expertise by working with Drupal and the Kohana framework.

Technologies used:

• Kohana
• PHP
• MySQL
• Bash
• Webmoney Merchant API
• HTTP
• FTP
• Curl
• Drupal