Backend & AI-focused developer building scalable web applications, from Kotlin microservices to React frontends.

Lukáš Kopecký – Kotlin & backend developer

KotlinJavaSpring BootReactNext.jsTypeScriptKafkaGraphQLAIDeep LearningDevOpsDocker

Lukáš Kopecký – backend developer from Hradec Králové

Years of
experience

20+

Projects
delivered

Open to new opportunities

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Projects

See All

ReactFrontendAdmin

Univerzita.app app for university students

KotlinNext.jsFullstack

ELSE LOOK real estate agency platform

Next.jsFullstackBooking

FYSA physiotherapy booking website

I Can Do Best

Backend development

KotlinJavaSpring BootMicroservices

I design and build scalable backend systems and microservices, from event-driven architectures with Kafka to REST/GraphQL APIs.

Web app development

ReactNext.jsTypeScript

I build fast, modern web applications with React and Next.js, pairing clean UI with robust functionality.

Generative AI & data science

Deep LearningAIData Science

I explore and apply AI and deep learning, including published work on computer vision, to solve real problems.

Generative AI & data science illustration

API design

GraphQLRESTWebFlux

I design scalable, well-documented APIs for mobile apps and third-party integrations, focused on performance and flexibility.

DevOps & cloud

DockerArgoCDKafkaPostgreSQLRedis

I streamline delivery with Docker, ArgoCD and cloud-native practices, and keep systems observable with Grafana and Kibana.

Work
Experience

Kotlin Backend Developer

in the Creative Dock Group

Engineering and optimizing a high-performance, microservices-based supermarket app for millions of users. Kotlin, Spring Boot, Kafka, ElasticSearch, Kibana, Grafana.

2025 – present

Kotlin/Java Backend Developer

in the DAMI development s.r.o.

Architected a shipment and storage lock-box system with a wallet/credit engine and bank integrations. GraphQL, Spring Boot, Kotlin, WebFlux, PostgreSQL, Redis.

2022 – present

Kotlin Backend Developer

in the Keyword Eater

Built and optimized an automated SEO platform, developing scalable backend services for real-time data processing and analytics.

2022 – 2023

Full-Stack Developer

in the MLJ solutions a.s.

Delivered full-stack features across the product, working across frontend and backend layers.

2020 – 2023

React Developer

in the Generali Česká pojišťovna

Developed web forms and interfaces with JavaScript, React.js, CSS/Less and Node.js.

2019 – 2020

Network Administrator

in the ZŠ a MŠ Mozaika s.r.o.

Managed the school network infrastructure and provided technical support and analysis.

2017 – 2019

My favorite
stack

Kotlin

Java

Spring Boot

Kafka

React

Next.js

TypeScript

GraphQL

PostgreSQL

Docker

I work from Hradec Králové as a freelance developer and Kotlin developer. As a backend developer I design microservices in Kotlin and Java and build web applications that handle complex workloads reliably. On the frontend I use React and Next.js, and I keep working with DevOps, Docker and AI.

See my services or the projects.

My Works