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  • Posted: Jul 28, 2026
    Deadline: Not specified
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  • 3Line commenced business in 2007 with the primary aim of using technology to make financial services easily available to the financially excluded. We believe this is a basic human right, and 3Line is our platform for achieving this purpose. We focus on four key areas: Electronic Banking, Issuer Processing, Agency Banking and Identity Management, all driven b...
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    Senior Channel Engineer

    Responsibilities

    • Design, develop, and maintain POS and mobile applications using Java, Kotlin, and the Flutter framework. 
    • Work with payment gateways to integrate secure and reliable transaction processing. 
    • Ensure all applications adhere to ISO card standards and other relevant payment industry regulations. 
    • Collaborate with cross-functional teams, including product managers, UX/UI designers, and other engineers, to define, design, and ship new features. 
    • Write clean, well-documented, and efficient code. 
    • Conduct unit and integration testing to ensure the quality and reliability of the applications. 
    • Troubleshoot and debug complex issues in production and development environments. 
    • Stay up-to-date with the latest industry trends and technologies in POS, mobile, and payment systems. 
    • Participate in code reviews to maintain high-quality code and share knowledge with the team. 
    • Provide mentorship and guidance to junior engineers.

    Qualifications

    • Minimum of 5 years of professional experience in POS or mobile application development. 
    • Strong proficiency in Java, Kotlin, and Dart (for Flutter). 
    • In-depth knowledge of Flutter and Android development frameworks. 
    • Proven experience with integrating payment gateways. 
    • Deep understanding of ISO card standards (e.g., ISO 8583) and other payment protocols. 
    • Strong analytical and problem-solving skills with the ability to debug complex technical issues. 
    • Excellent written and verbal communication skills. 
    • Experience working in an Agile development environment. 

    Bonus Skills: 

    • Experience with state management libraries like Bloc or Provider. 
    • Familiarity with cloud platforms such as AWS. 
    • Experience with other financial APIs. 

    Check how your CV aligns with this job

    Method of Application

    Interested and qualified candidate should send an updated CV to humanresources@3lineng.com, using the job title as the email subject.

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