Hi, I'm Aleksandr Čerkasov
I craft high-performance backend systems in PHP and build resilient, auto-scaling cloud architectures with AWS and Kubernetes (K8s). Passionate about clean code, continuous delivery, and bulletproof automation.
aleksandr@cerkasov.info:~$ whoami
Specializing in cloud infrastructure, Kubernetes microservices, & robust backend APIs.
{
"name": "Aleksandr Čerkasov",
"domain": "cerkasov.info",
"role": "PHP Developer & DevOps",
"stack": ["PHP", "AWS", "K8s", "SQL", "JS", "Bash"],
"status": "Active"
}
Engineering Services & Solutions
From cross-platform mobile apps and technical search optimization to high-load backend architecture and resilient cloud deployment.
Web Development & Architecture
End-to-end modern web application engineering. Designing responsive interfaces, robust server-side architectures, REST & GraphQL APIs, secure user authentication, and high-performance databases.
- Modern frontend & robust backend integration
- High-speed caching & Core Web Vitals optimization
- RESTful & GraphQL API design and documentation
- Maintainable code adhering to SOLID and Clean Code
Sylius E-Commerce Solutions
Tailored, enterprise-grade e-commerce platforms powered by Sylius and Symfony. Developing custom plugins, flexible checkout flows, payment gateways (Stripe, PayPal, Adyen), state machines, and ERP/CRM integrations.
- Custom Sylius plugins, channels & promotions
- Multi-currency, multi-store & international localization
- Complex state-machine order & inventory workflows
- Payment gateways, courier APIs & ERP integrations
Symfony Framework Engineering
High-concurrency enterprise backend systems built with Symfony (6.x/7.x). Crafting microservices, Doctrine ORM optimizations, asynchronous event handling with Symfony Messenger, and API Platform integration.
- Symfony components, Bundles & API Platform
- Doctrine ORM query profiling & caching strategies
- Asynchronous queues with Symfony Messenger & Redis
- Strict static analysis (PHPStan) & automated PHPUnit tests
Mobile App Development (React Native)
Fluid, high-performance cross-platform mobile applications for iOS and Android. Built with React Native to deliver 60fps native feel, device hardware integration, offline storage, and seamless backend API connectivity.
- Cross-platform iOS & Android codebase
- Native device APIs, push notifications & camera
- Offline-first data persistence & state management
- App Store & Google Play build preparation
AWS & Kubernetes DevOps
Scalable cloud infrastructure and zero-downtime continuous deployment pipelines. Provisioning AWS environments (EKS, RDS, S3, ALB), containerizing apps with Docker, and orchestrating Kubernetes clusters.
- Amazon EKS, EC2, RDS Multi-AZ & S3 architectures
- Kubernetes manifests, Helm charts & autoscaling (HPA)
- Docker multi-stage container optimization
- Automated CI/CD pipelines & Shell automation
Technical SEO & Web Optimization
Strategic technical search engine optimization ensuring maximum crawlability, high indexation rates, and top-tier Core Web Vitals. Implementing semantic structures, JSON-LD schema, and speed acceleration.
- Core Web Vitals & Lighthouse 95+ score tuning
- Structured Data (JSON-LD) & Schema.org implementation
- Semantic HTML5, a11y accessibility & meta optimization
- Crawl budget, robots.txt & sitemap architecture
Technical Proficiency
A comprehensive overview of the programming languages, cloud platforms, and automation tools I leverage daily.
PHP (7.x / 8.x)
Expert in modern PHP backend architectures, OOP design patterns, RESTful API design, microservices, dependency injection, and performance optimization.
- Modern PHP 8+ features & strict typing
- Clean Architecture, MVC & Microservices
- High-load performance tuning & caching
- Composer, Unit Testing & Static Analysis
Symfony Framework
Expertise in enterprise application architecture utilizing Symfony (6.x/7.x). Dependency injection, Bundles, Doctrine ORM, Symfony Messenger, and API Platform.
- Symfony 6/7, Bundles & Dependency Injection
- API Platform for RESTful & GraphQL backends
- Async message queues & EventDispatcher
- Doctrine ORM, schema migrations & query tuning
Sylius E-Commerce
Extensive experience engineering tailored e-commerce platforms with Sylius. Building custom plugins, state machines, localized checkouts, and ERP/payment integrations.
- Custom Sylius plugins & architecture customization
- Multi-channel, multi-currency & taxation rules
- Order state machines & inventory management
- Stripe, PayPal, Adyen & courier integrations
Amazon Web Services (AWS)
Designing, deploying, and managing scalable, fault-tolerant infrastructure using Amazon's cloud ecosystem.
- Amazon EKS (Elastic Kubernetes Service)
- EC2, VPC, Security Groups, IAM & Route 53
- RDS (MySQL/PostgreSQL), Aurora & ElastiCache
- S3, CloudWatch, ALB/NLB & Auto Scaling
Kubernetes (K8s)
Orchestrating containerized workloads, configuring ingress controllers, managing secrets, and implementing zero-downtime rollouts.
- Deployments, Pods, Services & Ingress
- ConfigMaps, Secrets & Persistent Volumes
- Helm Charts & Package Management
- HPA (Horizontal Pod Autoscaling) & Health Probes
Shell Scripting (Bash/Zsh)
Crafting robust shell scripts for automated deployments, server provisioning, backup routines, and CI/CD pipelines.
- Bash & Zsh command automation
- CI/CD pipeline scripts & Git hooks
- Linux system administration & cron scheduling
- Log parsing, grep/awk/sed & monitoring scripts
SQL (Relational DBs)
Relational database design, query optimization, indexing strategies, transactions, and high-performance data modeling.
- MySQL & PostgreSQL query optimization
- Indexing, EXPLAIN analysis & query tuning
- Schema migrations & relational integrity
- Transactions, ACID compliance & replication
JavaScript (ES6+)
Modern client-side scripting, asynchronous APIs (Fetch, Promises, Async/Await), DOM manipulation, and Node.js automation scripts.
- Modern ES6+ syntax & asynchronous programming
- API integration, JSON parsing & WebSockets
- Dynamic frontend interactivity & state handling
- Node.js build tools and developer workflows
HTML5 & CSS3
Semantic structure, modern CSS architectures (Flexbox, CSS Grid, Custom Properties), glassmorphism, responsive design, and animations.
- Semantic HTML5 & Web Accessibility (a11y)
- Modern CSS Grid & Flexbox layouts
- Glassmorphism, animations & micro-interactions
- Mobile-first & ultra-responsive styling
Docker & Linux Ops
Container packaging, multi-stage Docker builds, Linux kernel tuning, systemd management, and zero-downtime deployment pipelines.
- Optimized multi-stage Docker containers
- Linux systems (Ubuntu, Debian, Amazon Linux)
- Automated CI/CD pipelines (GitHub Actions, GitLab)
- Monitoring, logging & alert configuration
React Native
Cross-platform mobile application engineering for iOS and Android. High-performance UI rendering, native module bridging, and offline-first data sync.
- Cross-platform iOS & Android app architecture
- Native device APIs, push notifications & camera
- State management, caching & offline persistence
- App Store & Google Play publishing workflows
SEO & Web Optimization
Technical search engine optimization, web accessibility, semantic structuring, structured schema data, and Core Web Vitals optimization.
- Core Web Vitals & performance tuning (95+)
- JSON-LD structured schema markup implementation
- Semantic HTML5, accessibility & indexation audit
- Sitemaps, robots.txt & crawl efficiency
DevOps & Engineering Pipeline
How I architect, test, package, and orchestrate backend services from PHP code to auto-scaling cloud deployments.
Develop & Test
Clean PHP 8 backend architecture, modular APIs, unit testing, and SQL query profiling.
Containerize
Multi-stage Docker builds, dependency caching, Alpine/Debian base slimming, and secure secrets.
Orchestrate
Kubernetes manifests, Helm templating, rolling updates, health checks, and ingress routing.
Cloud Scale
AWS EKS managed nodes, RDS high-availability clusters, auto-scaling, and CloudWatch metrics.
Test My Shell Environment
Type commands into the terminal below or click one of the quick command buttons.
Type help for a list of available commands, or click the quick pills above.
Frequently Asked Questions
Answers to common questions regarding technical specialization, Sylius e-commerce development, cloud infrastructure, and consulting engagements.
I specialize in PHP (8.x), Symfony Framework, Sylius E-Commerce, Amazon Web Services (AWS), Kubernetes (K8s), Docker, React Native for iOS/Android mobile development, SQL (MySQL, PostgreSQL), Shell Scripting (Bash/Zsh), and Technical SEO. My focus is engineering resilient, high-traffic architectures from backend code to automated cloud infrastructure.
Yes. I have extensive hands-on experience developing tailored enterprise e-commerce solutions with Sylius and Symfony. This includes custom plugin creation, state-machine order workflows, multi-channel/multi-currency setups, payment gateway integrations (Stripe, PayPal, Adyen), courier APIs, and ERP/CRM integrations.
I design, containerize, and automate cloud environments with zero-downtime reliability. Key implementations include Amazon EKS (Elastic Kubernetes Service), multi-AZ RDS databases, S3 storage, Application Load Balancers, Helm chart deployments, Horizontal Pod Autoscaling (HPA), and automated Git-driven CI/CD pipelines with custom shell scripting.
Yes. I build fast, native-feeling mobile applications for both iOS and Android using React Native. Features include native module bridges, push notification services, secure offline storage, smooth animations, and tight integration with backend REST/GraphQL APIs.
You can reach me directly by email at cag@creativeweb.lt or call/message me at +37068239059. I am available for senior engineering contracts, architecture consulting, e-commerce development, and DevOps infrastructure audits.
Let's Build Something Resilient
Whether you need backend architecture with modern PHP, AWS cloud infrastructure setup, or Kubernetes cluster orchestration — I am ready to collaborate.
curl -s https://cerkasov.info/contact.txt