JavaScript Developer (

Argentina Brazil Bulgaria Colombia Czech Republic Europe Hungary Latin America Mexico Poland Portugal JavaScript Software Developer

Required skills

JavaScript / strong
CSS and its pre-processors / strong
Vanilla.js / strong
English / strong

Would like to know more about malvertising and how you can help stop it? Then join us in the fight with Bad Actors! 

We invite a JavaScript Developer who will be responsible for developing and designing the heart of our solution that struggles with malvertising.  


Our customer is a leader in the development of the most comprehensive end-to-end anti-fraud protections. They are working over two innovative and start-up solutions with the goal to protect clients’ user experience, revenue and brand. 

The first product turned up a success in AdTech, protecting the world from malvertising. The second product allows E-commerce merchants to protect their margins through mitigation of negative effects extensions like Honey, Wikibuy, Piggy, and more. 

The tech stack of products portfolio includes a variety of technologies and utilises different program languages like, but no limited to JavaScript (ES, TypeScript, ReactJS), Go, Scala, Python. 


The project develops a cybersecurity solution protecting revenue and user experiences across all platforms. 


  • 3+ years of experience in developing web-based applications 
  • A high degree of fluency in Vanilla JavaScript ES6 and Typescript, with knowledge of modern techniques as well as core JS concepts 
  • Good knowledge of CSS and its pre-processors 
  • Good knowledge of algorithms and data structures 
  • Strong experience in writing high-quality, performance-optimized, robust code involving approaches such as unit testing, code coverage, and static code analysis 
  • Strong experience in responsive and cross-browser web application development 
  • Ability to analyze and refactor legacy code 
  • Experience in modern frontend build tooling (Webpack, Rollup, Closure Compiler) 
  • At least Intermediate level of English

Personal Profile

  • Enthusiasm, pragmatism, and modesty  
  • Highly self-motivated  
  • Excellent attention to details 
  • You’re good with people, communicating clearly and respectfully in a way that’s appropriate to your audience   
  • You ask the right questions and avoid making assumptions  


  • Create technical designs for new, innovative solutions to enhance current protection mechanism 
  • Reverse bunch of code of malicious actors and think through preventing solutions 
  • Take ownership over the features and implement them 
  • Maintain the heart of the solution – script, i.e., monitor the new versions of browsers, updates of extensions or other 3rd party components that may impact script work 


  • Diversity of Domains & Businesses
  • Variety of technology
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities

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