Skills & tools

C

Expert

Low-level language used to understand memory management and system-level programming.

Languages

JavaScript

Expert

Core language of the web used across frontend interfaces and backend services.

Languages

Python

Expert

General-purpose language used for backend services, scripting, and automation.

Languages

TypeScript

Expert

Strongly typed JavaScript superset improving code safety, refactoring, and scalability.

Languages

C#

Advanced

Strongly typed language used for backend development on the .NET platform.

Languages

Java

Advanced

Enterprise-grade language for building reliable, long-running backend systems.

Languages

C++

Basic

Used for system programming, performance-critical applications, and game development.

Languages

BullMQ

Expert

Redis-based queue system for background jobs and async processing.

Backend

Express.js

Expert

Minimal Node.js framework for building REST APIs with middleware-based architecture.

Backend

i18next

Expert

Internationalization framework for managing translations and multi-language support.

Backend · Frontend

Joi

Expert

Schema-based validation library ensuring API request data integrity.

Backend

Node.js

Expert

JavaScript runtime for building fast, scalable backend services and event-driven APIs.

Backend

Transactional emails — bookings, invitations, password recovery — rendered from EJS templates.

Backend

Prisma

Expert

Type-safe ORM simplifying database access and schema migrations.

Backend

Sequelize

Expert

ORM providing model-based access to SQL databases.

Backend

Swagger

Expert

Tooling for designing, documenting, and testing REST APIs using OpenAPI specifications.

Backend · Project Management

Elasticsearch

Advanced

Search and analytics engine used for log analysis and observability.

Backend

RabbitMQ

Advanced

Message broker enabling asynchronous system communication.

Backend

Stripe

Advanced

Payment processing platform for subscriptions, payments, and billing workflows.

Backend

Google Cloud

Basic

Google APIs and services used for integrations such as OAuth sign-in.

Backend

NestJS

Basic

Opinionated Node.js framework with modules and dependency injection, explored in a starter template.

Backend

Socket.IO

Basic

WebSocket library for real-time, bidirectional events between server and clients.

Backend

Spring Boot

Basic

Java framework for building scalable and production-ready backend services.

Backend

Zod

Basic

TypeScript-first schema validation with static type inference.

Backend · Frontend

HTML

Expert

Markup language defining semantic structure of web pages.

Frontend

Ant Design

Advanced

Enterprise React component library used for admin panels and data-heavy screens.

Frontend

Bootstrap

Advanced

CSS framework for building responsive and consistent user interfaces.

Frontend

CSS

Advanced

Styling language used for layouts, responsiveness, and UI design.

Frontend

Leaflet

Advanced

Lightweight JavaScript library for interactive maps and geospatial visualizations.

Frontend

Next.js

Advanced

React framework with the App Router — used for the Flowers Shop storefront, BarThunder and this site.

Frontend

React

Advanced

Component-based UI library; server and client components in Next.js apps.

Frontend

React Native

Advanced

Framework for building cross-platform mobile applications with React concepts.

Frontend

Tailwind CSS

Advanced

Utility-first CSS framework for fast, consistent styling with design tokens.

Frontend

Webpack

Basic

Module bundler used to package the Swagger UI in express-joi-to-swagger.

Frontend

PostgreSQL

Expert

Advanced relational database focused on data integrity, performance, and complex queries.

Storage

Redis

Expert

In-memory data store used for caching, queues, sessions, and real-time data.

Storage

MongoDB

Advanced

NoSQL document database designed for flexible schemas and rapid iteration.

Storage

MySQL

Advanced

Popular relational database used in transactional and data-driven systems.

Storage

SQLite

Advanced

Embedded, file-based SQL database for lightweight apps, prototypes and fast local testing.

Storage

Mongoose

Basic

MongoDB object modelling with schemas, validation and middleware hooks.

Storage

JWT

Expert

Stateless authentication mechanism using signed tokens.

Security

Helmet

Advanced

Secures applications by configuring HTTP security headers.

Security

OAuth

Advanced

Authorization framework for secure delegated access.

Security

Passport

Advanced

Authentication middleware supporting multiple strategies.

Security

CloudWatch

Advanced

AWS monitoring service for logs, metrics, and alarms on cloud resources.

AWS · Monitoring

EC2

Advanced

AWS virtual servers used to deploy and scale backend applications.

AWS · Backend

IAM

Advanced

AWS identity and access management for permissions, roles, and security policies.

AWS

S3

Advanced

AWS object storage for files and media, also used via S3-compatible services.

AWS · Storage

SES

Advanced

AWS email service for sending transactional and notification emails at scale.

AWS · Backend

Local AWS cloud emulator for developing against S3 without touching real infrastructure.

AWS · DevOps

RDS

Basic

Managed AWS service for running relational databases with automated backups and scaling.

AWS · Storage

Docker

Expert

Containerization platform ensuring consistent runtime environments.

DevOps · Backend

GitHub Actions

Advanced

CI/CD workflows for linting, tests and deployments — including this site’s GitHub Pages deploy.

DevOps

Linux

Advanced

Operating system used for servers, deployments, and backend infrastructure.

DevOps

Shell

Basic

Used for automating deployments, server tasks, and development workflows.

DevOps

Chai

Expert

Assertion library used to validate application behavior in tests.

Testing

Mocha

Expert

JavaScript testing framework for unit and integration tests.

Testing

Postman

Expert

Tool for testing, debugging, and documenting REST APIs.

Testing

HTTP assertions for end-to-end testing of Express endpoints together with Mocha and Chai.

Testing

Code coverage tooling — used to track Notino coverage growing from 79% to 93%.

Testing

JMeter

Advanced

Load and performance testing tool for backend systems.

Testing

Jest

Basic

All-in-one JavaScript test runner with mocking and snapshot testing.

Testing

Winston

Expert

Structured logging library for Node.js applications.

Monitoring

Sentry

Advanced

Error tracking and performance monitoring in production environments.

Monitoring

OpenAI

Advanced

API platform enabling AI-powered features such as text generation and automation.

AI

Ollama

Basic

Runs open LLMs locally; powers the AI shopping assistant in Flowers Shop.

AI

Git

Expert

Version control: branching strategies, rebasing, code review and clean history.

Project Management · DevOps

GitHub

Expert

Version control and collaboration platform for managing source code.

Project Management

Bitbucket

Advanced

Git hosting with Bitbucket Pipelines CI used to type-check, test and deploy production services.

Project Management · DevOps

Jira

Advanced

Agile project management tool for sprint planning and tracking.

Project Management

Notion

Advanced

Documentation and collaboration workspace for teams.

Project Management

ESLint

Expert

Static analysis tool enforcing code quality and consistency.

Others

Prettier

Expert

Opinionated code formatter keeping style consistent across teams.

Others

Git hooks that lint code and enforce Jira-linked commit messages before they land.

Others

Unity

Basic

Game engine used for learning real-time 2D/3D development concepts.

Others