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Confidential Professional
Confidential Professional

Senior Full-Stack Software Engineer

Actively looking · Member since 28 Sep 2026
Message
Location
Czechia
Desired salary
Unspecified
Work preference
Remote Only / Contract, Freelance
Experience level
Senior

About

Professional summary

I am a Senior Full-Stack Software Engineer with over 12 years of experience building scalable web applications, backend services, and high-performance user interfaces. My core expertise is JavaScript, TypeScript, Node.js, React, and modern cloud-native development practices.

I have delivered full-cycle software solutions across iGaming, AdTech, mobile analytics, financial analytics, and banking. I am experienced in taking ownership of features from technical design and architecture through implementation, testing, deployment, and production support.

In my most recent role, I developed and optimized React-based applications and Node.js APIs for an international betting platform. I designed scalable backend systems, migrated legacy microservice functionality, improved SQL performance, resolved memory leaks, and built reliable RabbitMQ-based asynchronous data persistence.

I work comfortably across frontend and backend engineering, including React, Next.js, Redux, Node.js, NestJS, GraphQL, PostgreSQL, MongoDB, Redis, and AWS. I also have practical experience with Docker, Kubernetes, CI/CD, monitoring, logging, and production incident response.

I value maintainable architecture, clear technical documentation, application performance, and software quality. I use approaches such as C4 modeling, PlantUML, automated testing, code reviews, and dependency/security maintenance to create reliable systems.

I am available for B2B and contractor opportunities, particularly in UTC+1 and UTC+2 time zones. I am interested in senior full-stack engineering roles where I can contribute to complex products, scalable platforms, and strong engineering teams.

Skills

42 capabilities
AngularJSAWSBackend DevelopmentCI CDCSS3DockerExpressFirebaseFrontend DevelopmentGrailsGraphQLGroovyHTML5Incident ManagementIntegration TestingJavaScriptKoaKubernetesLESSMicroservicesMongoDBMongooseNestJSNext.jsNginxPerformance OptimizationPlantUMLPostgreSQLPrismaRabbitMQReactRedisReduxRedux SagaResponsive Web DesignREST APIsSequelizeSQLSystem DesignTypeScriptUnit TestingWebSockets

Tech stack & tools

Working toolkit

Analytics

GrafanaSentry

Application Hosting

FirebaseJenkinsNginxRedis

Data Stores

MongoDBPostgreSQLSequelize

Development

DockerESLintGitGulpJestKibanaKubernetesMongoosePrismaPuppeteerRabbitMQRancherWebpack

Languages & Frameworks

Cucumber

Monitoring

Prometheus

Experience

Career history

Senior Full-Stack Software Engineer Private company

Engineered and optimized a complex React-based web application builder that generated localized interfaces for global markets, improving loading speed and application performance by approximately 30%. Expanded from frontend development into full-stack ownership of core bonus-system features.

Led end-to-end Node.js backend development, including scalable REST APIs, data persistence, and production business logic. Designed technical solutions using C4 modeling and PlantUML, migrated legacy Go microservice logic to Node.js APIs, and improved maintainability.

Refactored SQL queries, resolved critical Node.js memory leaks, and reduced latency and server load during peak traffic. Built RabbitMQ-based asynchronous persistence mechanisms, managed production incidents, patched vulnerabilities, and extended a legacy React 16 CRM system with high-impact features.

Full-Stack Engineer Private company

Built and maintained AdTech microservices for asset and creative management platforms, as well as automated publishing workflows supporting high-volume digital advertising campaigns.

Implemented bidirectional Facebook Graph API integrations for automated ad creation, approval management, and publishing. Developed React, Redux, and TypeScript interfaces alongside Node.js services using Apollo GraphQL and MongoDB.

Created unit and integration test coverage with Jest and Enzyme, containerized applications with Docker, and supported deployment on AWS.

Frontend Engineer Private company

Developed complex data-driven web applications from the ground up for a Swiss mobile analytics client. Maintained legacy Angular 1.6 systems while migrating core modules to React, Redux, and TypeScript.

Built lightweight Node.js services and integrated Firebase and Facebook API capabilities for real-time data streaming and user management. Established Webpack build pipelines and automated testing practices using Jest and Enzyme.

Frontend Engineer Private company

Engineered and maintained high-frequency frontend interfaces for a financial analytics platform delivering real-time market data.

Used WebSockets and Web Workers to move intensive data processing off the main browser thread and maintain responsive UI performance during high-volume data spikes. Developed a responsive mobile web platform and modernized build processes with React, Webpack, and Gulp.

Web Developer Private company

Co-developed and maintained internal banking platforms, including a secure online payment system and internal corporate tools.

Managed technical implementation, user interface layout, and system support using JavaScript, Groovy, Grails, and custom web technologies.

Education

Learning history
No education data available.

This professional hasn’t added portfolio projects yet.

This professional hasn’t listed any services yet.

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