Артем

Artem Slaston
Backend Engineer (PHP, TypeScript, Systems)
Remote, Ukraine [відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») github.com/artem-slastyon
[відкрити контакти](див. вище в блоці «контактна інформація») slasten_artem

SUMMARY
Backend Engineer with 5+ years of experience specializing in high-maintainability system design. I focus on architectural
maturity, implementing Clean Architecture via Action Pattern, DTOs, and Mappers to ensure decouple business logic from
delivery mechanisms.

Possess a deep technical curiosity extending into systems programming and low-level networking, with practical
experience in reverse engineering (ELF/PE analysis, firmware) and implementing custom network protocols. Experienced
in optimizing high-load database queries (PostgreSQL/MySQL) via execution plan analysis and B-Tree index optimization.

Strong DevOps mindset: capable of independently building containerized environments (multi-stage Docker), configuring
GitLab CI/CD pipelines with automated SSH deployment, and managing Linux server permissions (ACLs). Proficient in
technical documentation and async communication in English.

EXPERIENCE
Freelance Remotely
Backend Engineer | Real Estate Platform (Phalcon) Dec 2024 - Apr 2026
• Executed a strategic refactoring of legacy Phalcon code, decoupling "fat" controllers and models into a service-oriented
architecture, which significantly reduced technical debt and accelerated the feature delivery cycle.

• Optimized high-load PostgreSQL queries by analyzing execution plans, reducing key endpoint response times by 20%
and ensuring sub-second load speeds for complex data sets.

• Designed and implemented a fully automated synchronization engine with Magento e-commerce via JSON-RPC, ensuring
strict data consistency and eliminating manual data migration overhead.

Freelance Remotely
Backend Engineer | Payment Systems Jul 2024 - Aug 2024
• Developed a secure payment processing gateway via Monobank API, implementing idempotency keys and a robust retry
mechanism to ensure 100% transaction reliability.

• Automated user access provisioning through PaperMC API integration, achieving instant service delivery upon payment
confirmation and eliminating administrative manual work.

Self-Employed Remotely
Systems & Backend Developer Jun 2022 - Dec 2024
• Architected multiple scalable system components to explore polyglot architectures, utilizing TypeScript, Node.js, and Java
17 to optimize specific service requirements.

• Focused on implementing modular design patterns and building custom CLI tools to automate local development
workflows.

Ronis Kharkiv, Ukraine
PHP Developer (Phalcon) Jun 2021 - Jun 2022
• Collaborated in a cross-functional team using Jira to streamline the full SDLC, utilizing Phalcon for high-performance
backend services.

• Developed REST API endpoints following OpenAPI/Swagger specifications, reducing integration time with SPA frontend
teams.

• Significantly increased the reliability of RabbitMQ-based email queues by implementing DTO validation and robust
exception handling, eliminating worker crashes.

•

Reduced production bug count by ~20% through tight collaboration with QA and implementation of comprehensive test
cases during development.

• Standardized local development environments via Docker Compose, reducing new member onboarding time by ~30%.

FEATURED ENGINEERING PROJECTS
Professional Ticketing & User Management System 2026
• Implemented a decoupled backend using the Action Pattern and DTOs, moving business logic out of controllers to ensure
high reusability across Web, API, and CLI interfaces.

• Developed a robust RBAC system (Spatie Permissions, Laravel Policies) verified through a comprehensive suite of PHPUnit
feature tests.

• Leveraged PHP 8.x Enums and strict typing to implement a type-safe domain model and eliminate runtime errors.

• Built a custom Mapper pattern and Eloquent Query Scopes to isolate the database persistence layer from the presentation
layer.

AppCore: Modular Systems Framework 2023-2024
• Designed a plugin-based architecture in TypeScript allowing dynamic loading/unloading of system and user modules
from the filesystem.

• Implemented a Service Locator pattern to manage dependencies and provide centralized access to core system
components.

• Developed a Data Mapper layer to translate raw data objects into strictly typed domain models, ensuring architectural
consistency.

• Utilized Event-Driven design (EventEmitter) to manage the lifecycle of system components.

SOCKS5 UDP Proxy Verifier Self-Directed
• Implemented a low-level networking tool in Pascal/Lazarus to verify UDP support in SOCKS5 proxies, solving a specific
connectivity issue for RakNet-based applications.

• Worked directly with socket-level communication to implement the SOCKS5 handshake and UDP association protocols.

• Developed a custom multi-threaded checker to validate proxy stability and protocol compliance.

PROFILES
GitHub
artem-slastyon

LinkedIn
artem-slastyon

TECHNICAL STACK
Core Backend
PHP 8.x (SOLID, Action Pattern, DTO), Laravel (Service Providers, DI, Eloquent Optimization), Phalcon (Performance optimization, DI
Container), TypeScript & Node.js (Generics, Modular Architecture), Java 17+ (Streams API, Gradle)

Data Management
MySQL / MariaDB (B-Tree Indexes, EXPLAIN), PostgreSQL (Query Optimization, Normal Forms), MongoDB (CRUD, Basic Aggregations), Redis
(Caching, Session Storage)

Infrastructure & DevOps
Docker (Multi-stage builds, Compose), GitLab CI/CD (Pipelines, SSH Deploy), Linux Admin (Bash, ACL/setfacl, systemd), Web Servers (Nginx,
Apache, Certbot)

Systems & Research
Reverse Engineering (ELF/PE, Decompilation), Networking (UDP/TCP, SOCKS5 Protocol), Firmware Analysis, Low-level Debugging (XDebug,
GDB)

LANGUAGES
English
Professional Working Proficiency

Russian
Native

Ukrainian
Professional Working Proficiency

PROFESSIONAL DEVELOPMENT
Advanced Backend Architecture 2021
Self-Directed Study
Specializing in PHP 8.x, System Design, and PostgreSQL Optimization. Focus on implementing SOLID, DRY, and design
patterns in commercial projects.

ENGINEERING INTERESTS
System Analysis
Executable Disassembly, Binary Analysis, OS Internals

Infrastructure
HomeLab Automation, Self-Hosting, Network Security