Karlen

Full-stack Developer

35 €/h

Karlen is a Software Engineer with more than 6 years of professional experience.

He started his career as a Junior Java/JavaScript developer back in 2013. He has experience with different types of software architectures, started from monolithic to cloud-based micro-services. Besides programming experience, he is doing his Ph.D. in CS with “Machine Learning in Distributed Environments”.
At the moment, Karlen works as a CTO. He is a passionate and very responsible person and is a valuable asset for any project.

  • JavaScript

    JavaScript

    7 yr.
  • Java

    Java

    3 yr.
  • MSSQL

    MSSQL

    6 yr.
  • React.js

    React.js

    3 yr.
  • Redux.js

    Redux.js

    3 yr.
  • Node.js

    Node.js

    5 yr.
  • AWS

    AWS

    3 yr.
  • Microservices

    Microservices

    3 yr.
  • AWS Lambda

    AWS Lambda

    3 yr.
  • AWS S3

    AWS S3

    3 yr.
  • AWS SQS

    AWS SQS

    3 yr.
  • ES5/ES6

    ES5/ES6

    3 yr.
  • Glide

    Glide

    3 yr.
  • eCommerce

    eCommerce

    3 yr.

Selected experience

Senior JavaScript Developer

Bet Construct · 5 months

Live casino was built using WebRTC video protocol and Web Socket messaging.

Technologies used:
skill

React.js

skill

Redux.js

Senior Software Engineer

SFL · 5 months

Was involved in several different projects.

Technologies used:
skill

JavaScript

skill

Java

skill

React.js

skill

Redux.js

skill

Node.js

CTO

Brainstorm · 2 years 5 months

The company mainly focuses on web technologies. The team builds serverless and server-based applications. Client-side uses React/Redux wired with other tools (Saga, CSS with LESS/SASS/BEM, HTML 5 API, Webpack/Gulp). For mobile applications they use React Native and React Native Expo depending on app specifications. On server-side they use Node JS and for some services they use Java (some basic functionality with Go). Architecture and technology choice depend on requirements, but, unless nothing extraordinary they go with MVC with a bit customized layer. Database choice is also based on product we build. But mostly they use PostgreSQL and Mongo DB. All the deployment is done in AWS. Using AWS autoscaling for horizontal scaling of on-premise instances. For Sql databases they use AWS RDS service. For MongoDB they use MongoDB Atlas. CI/CD is done with the Code Pipeline and GitHub hooks. The team uses the following services from AWS - EC2, S3, Lambda, Document Db, SNS, CodePipiline, CodeBuild, CodeDeploy Cloudfront, RDS, Auto Scaling, ElasticCache.

Technologies used:
skill

Java

skill

AWS

Education

Doctor Of Philosophy Informatics and Automation Problems

National Academy of Sciences · 2017 - 2020

How it works

2-3 mins

Tell us about your needs

Talk to us about your technical requirements and goals for your product or project.

1-2 weeks

Meet and work with your new tech star

Within days, you will meet and work with a hand-selected and quality-assured tech talent.


1 week

Right person for the right assignment, guaranteed

Completely risk-free for a week. Pay only if satisfied.

Have a question?

How much does it cost to hire a developer at Proxify?

When it comes to pricing, we believe in transparency. You always know how much you will pay. Our simplest pricing plan is flexible pricing where you pay between 28 and 35 euros / hour. That's it, no hidden costs and no startup fees. The price you pay between 28 and 35 euros / hour depends on the experience and seniority of the developer selected. If you know in advance that you will need someone part-time or full-time, we can offer you an even lower rate if you are able to commit to those hours. You can always switch between our pricing plans.

How does the risk-free trial period with a developer work?

It's simple, due to our thorough and best-in-class vetting process, we know that our developers are among the very best in their field. This is why we can offer you a risk-free trial for one week. You only pay if satisfied.

Can Proxify really present a suitable developer within 1 week?

Yes, in close to all cases we can present a developer within a week. There can be cases where a client might be searching for a developer with particular, additional skills or experience and then it can sometimes take longer to find the right candidate. If you feel that your case may be unique or particular in any way, contact us and we will do our best to tell you the most likely time frame for finding the perfect talent for your needs.

How does the vetting process work?

We pride ourselves on the fact that we have one of the industry's most comprehensive vetting processes. We receive thousands of applications from developers who apply to become a part of Proxify but only a fraction of those developers pass through our screening process: interviews, code, logic, personality and English tests - we told you it was comprehensive! Indeed, under 4% of those that apply become a part of Proxify and this enables us to guarantee that you will be presented with a senior, trusted developer who we know will be the perfect match for your company.

Stress-free hiring of tech expertise starts here

Coding is a universal language. That’s why Proxify searches far and wide for the best global talent within tech. We make it safe, secure and easy to hire developers and designers. And at a good price, of course.

In a short 15-minute call, we would like to:

  • Understand the type of talent your company needs
  • Discuss the most suitable engagement plan for you
  • Tell you exactly how Proxify works

Book a meeting