Senior Mobile (Flutter) Developer for CRITICALSTART


Daxx is looking for a Senior Mobile (Flutter) Developer to join a team in our Kyiv office.

We are looking for an expert Flutter developer who is highly skilled with Android and/or IOS development.
Your primary focus will be developing user-facing mobile applications and components. You’ll implement them with Flutter framework, following generally accepted practices and workflows. You will ensure that you produce robust, secure, modular, and maintainable code.
You will coordinate with other team members, including backend developers and UX/UI designers. Your commitment to team collaboration, perfect communication, and a quality product is crucial.

About the client:

CRITICALSTART is the fastest-growing cybersecurity integrator in North America. Our mission is simple: protect our customers’ brands and reduce their business risk. We do this for organizations of all sizes through our award-winning portfolio of end-to-end security services – from security-readiness assessments using our proven framework, the Defendable Network, to the delivery of managed security services, professional services, and product fulfillment.

CRITICALSTART has achieved the Service Organization Control (SOC) 2 Type II compliance certification and was named a CRN® 2018 Triple Crown Winner.

Our goal is to become the most effective, easiest to consume, and quickest to deploy Managed Detection & Response service.


  • Developing user-facing mobile applications using Flutter.
  • Improving the customer experience by continuously implementing new features, optimizing user flows, and increasing technical performance
  • Building modular and reusable components and libraries.
  • Optimizing your application for performance
  • Be responsible for shipping cross-platform application for Android and IOS
  • Use your experience in front-end technologies to identify frameworks, libraries, techniques and strategies to be used to build world class mobile apps
  • Implementing automated testing integrated into development and maintenance workflows.
  • Staying up-to-date with all recent developments in Play/App store requirements and mobile application capabilities and trends to be able to help inform development teams on. possible roadmap features, including implementation breakdowns and prototypes
  • Keeping an eye on security updates and issues found with mobile and all project dependencies.
  • Proposing any upgrades and updates necessary for keeping up with modern security and development of best practices.


  • Hands-on experience with Flutter.
  • 5+ years of experience in mobile development  (iOS/Android).

Daxx offers:

  • Direct cooperation with the customer
  • Dedicated HR/ Client Manager
  • Regular performance reviews
  • Competitive salary, medical insurance, 20 working vacation days
  • Regular corporate events, team buildings, etc.
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Tatyana Gramma

Tatyana Gramma

Kyiv Recruiter

Job Overview

  • Location: Kyiv
  • Job Title: Senior Mobile (Flutter) Developer for CRITICALSTART