Hi! We're looking
for Android Developers (Java/Kotlin)
At 4XXI we have been doing custom web & mobile development for 11 years, mostly for US, UK and European customers. We are developers. We do not like bureaucracy and we do not play politics. We simply do our job and do it well, as our clients all testify. Each product we build we consider as our own.

We have over 80 successful projects in our portfolio, most of which have been written about on TechCrunch, Forbes, Business Insider, NY Times, Wired, etc.

Today we have 3 offices in 2 countries but also consider remote work.
About us
London, England
✨ Job Description
Knowledge, Skills, and Abilities:
  • Strong knowledge of android operating systems, SDK, and development environments;
  • Have experience in using version control tools while managing conflict;
  • Automated testing, building, and packaging of Android's Artifacts experiences;
  • Have a solid understanding of Restful API interaction and JSON;
  • Have experience in optimizing, refactoring, and debugging, especially in the scope of layout development, customize themes, styles, attributes, and other resources;
  • Self-motivated and self-managed with a high degree of analytical skills and intellectual curiosity, responsible and trustworthy personality;
  • Familiar with Android Studio and Gradle;
  • Have strong knowledge of CI/CD and can containerize CI/CD pipelines and create reproducible builds from development to production;
  • Solid understanding of algorithms, memory management, the design pattern of MVVM, MVP;
  • At least one released application on Google play store with a large customer base;
  • Fluent written and spoken English.

Job Expectations:
  • Develop and deploy applications on the Android platform using Java and Kotlin
  • Work with product owners and technical leaders to continually improve processes of development and product quality.
  • Work with other team members and mentor them to promote excellent customer experiences.
  • Propose the newest innovative tools, 3rd party frameworks, automation, and processes for the whole mobile team
  • Can cooperate with different teams across different countries by the English language
  • Analyze customer and software requirements to determine the feasibility of design within time and cost constraints.
  • The duties and responsibilities described above may provide only a partial description of this position. This is not an exhaustive list of all responsibilities of the position. Other duties and responsibilities not outlined in this document may be added as necessary or desirable, with or without notice.

Experience Requirements:
  • 5+ years of experience in Android app software development (Java/Kotlin), E-commerce experience is a plus;
  • 1+ years of experience contributing to the architecture and design of new and current systems (architecture, design patterns, reliability, and scaling).

Education Requirements:
  • BS Computer Science or related fields required or equivalent experience;
  • Master degree preferred.

  • Many complex, interesting projects with different technology stack;
  • English lessons, the opportunity to communicate with distributed teams on the customer side;
  • Professional growth: individual development plans, mitaps, online courses, books to pump up your hard/soft skills;
  • Flexible start of the working day, remote work format is possible;
  • Formalization under Labor Code/PI: paid vacations, sick leave, etc;
  • VHI;
  • The level of pay depends on your skills and experience;
  • Corporate events, PS, board games, etc.
✋ Meet the team
Interested in this job?
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