Recommended expert

Artem Potapenko

Team leader

Artem Potapenko
Prague, Czech Republic

Experience

Jan 2022 - Present
4 years 2 months

Team leader

Oyatsu

  • Designed and optimized backend systems using Spring Boot, developing RESTful APIs, integrating databases, and implementing secure authentication for high-traffic enterprise applications.
  • Created responsive, cross-platform interfaces with Java and React, leveraging state management solutions and UI frameworks to deliver seamless user experiences.
  • Modeled and maintained database schemas (PostgreSQL, MySQL, MongoDB) for healthcare solutions, ensuring HIPAA compliance, scalability, and high-performance query execution.
  • Deployed and managed cloud-native applications on AWS, leveraging EC2, S3, RDS, Kubernetes, and Lambda to achieve secure, scalable, and highly available infrastructure.
  • Developed automation workflows using Spring Boot integrated with Zapier and n8n, enabling seamless data synchronization, task orchestration, and intelligent process automation across systems.
  • Developed Java-based automation systems integrating LLMs (OpenAI) to streamline workflows and enable intelligent, data-driven process automation.
May 2018 - Dec 2021
3 years 8 months

Senior Engineer

Iteo

  • Designed and deployed scalable microservices and serverless systems using Celery with Redis/RabbitMQ for distributed task management and real-time workflows.
  • Developed and maintained backend services with Spring Boot, building REST APIs, integrating relational and NoSQL databases, and optimizing performance via microservices and caching strategies.
  • Led the modernization of legacy frontends by migrating to React, updating the codebase while maintaining functionality and system performance.
  • Built secure, real-time communication platforms using WebSockets, Kafka, and gRPC, implementing advanced authentication and authorization protocols (OAuth2, JWT, RBAC).
May 2014 - Apr 2018
4 years

Developer

Winncom Technologies

  • Built automated testing frameworks using JUnit, TestNG, Mockito, and Selenium, applying performance optimization techniques to ensure scalable, reliable, and high-performing Java applications.
  • Developed responsive, user-focused React interfaces using Redux for state management and UI frameworks like Bootstrap and Semantic UI, collaborating on UX/UI design in Figma and optimizing performance and SEO through server-side rendering (SSR).
  • Architected and delivered comprehensive ERP systems, integrating finance, inventory, HR, and sales modules to enable scalable operations, workflow automation, and real-time reporting.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (12 years) and Healthcare (4 years).

Information Technology
Healthcare

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (12 years), Product Development (12 years), and Quality Assurance (4 years).

Information Technology
Product Development
Quality Assurance

Summary

I’m a Senior Full Stack Engineer with 10+ years of experience delivering enterprise-grade applications and user-focused digital products. On the backend, I specialize in Java, Kotlin, and Spring Boot, building secure APIs, modular services, and high-performance platforms with a focus on clean architecture and maintainability. On the frontend, I work with modern TypeScript frameworks such as React, Next.js, Vue, Nuxt, Angular, and SvelteKit to create responsive, high-performing interfaces for web and mobile. I excel at combining backend scalability with frontend innovation to deliver solutions that are both robust and engaging.

Skills

  • Backend: Java (Spring Boot, Kotlin, Maven, Gradle), Api Development (Restful Apis, Graphql), Architecture (Mvc, Microservices)
  • Frontend: Angular, React, Next.js, React Native, Vue.js, Nuxt.js, Responsive Ui/ux Design, State Management (Redux, Vuex, Pinia, Zustand), Component Libraries (Material Ui, Ant Design, Vuetify), Ssr (Server-side Rendering) & Ssg (Static Site Generation)
  • Databases: Postgresql, Mysql, Mongodb, Redis, Vector Databases (Pinecone, Weaviate, Faiss, Milvus)
  • Devops / Cloud: Docker, Kubernetes, Aws (Lambda, S3, Ec2), Ci/cd Pipelines (Github Actions, Gitlab Ci, Jenkins), Monitoring & Logging (Prometheus, Grafana, Elk Stack)
  • Other: Openai, Zapier, N8n, Websockets, Kafka, Grpc, Elasticsearch, Authentication & Security (Oauth2, Jwt, Rbac), Testing (Rspec, Testng, Mockito, Selenium), Performance Optimization & Scalability

Languages

English
Advanced
Spanish
Advanced

Education

Dec 2009 - Feb 2014

Kobe University

Bachelor Degree · Kobe, Japan

Profile

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Artem based?

Artem is based in Prague, Czech Republic.

What languages does Artem speak?

Artem speaks the following languages: English (Advanced), Spanish (Advanced).

How many years of experience does Artem have?

Artem has at least 12 years of experience. During this time, Artem has worked in at least 3 different roles and for 3 different companies. The average length of individual experience is 4 years and 11 months. Note that Artem may not have shared all experience and actually has more experience.

What roles would Artem be best suited for?

Based on recent experience, Artem would be well-suited for roles such as: Team leader, Senior Engineer, Developer.

What is Artem's latest experience?

Artem's most recent position is Team leader at Oyatsu.

What companies has Artem worked for in recent years?

In recent years, Artem has worked for Oyatsu and Iteo.

Which industries is Artem most experienced in?

Artem is most experienced in industries like Information Technology (IT) and Healthcare.

Which business areas is Artem most experienced in?

Artem is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

Which industries has Artem worked in recently?

Artem has recently worked in industries like Information Technology (IT) and Healthcare.

Which business areas has Artem worked in recently?

Artem has recently worked in business areas like Information Technology (IT) and Product Development.

What is Artem's education?

Artem holds a Bachelor from Kobe University.

What is the availability of Artem?

The availability of Artem needs to be confirmed.

What is the rate of Artem?

Artem's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

How to hire Artem?

To hire Artem, click the Meet button on the profile to request a meeting and discuss your project needs.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

800
600
400
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Market avg: 590-750 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.