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Open since Aug 2026

Lead Java Developer (with C background)Idt · Warsaw

Lead Java Developer (with C background)

WarsawRemote

AI Summary

Lead Java Developer with C background to build and scale a cloud PBX solution based on Asterisk, implementing SIP proxy features, custom C modules, and Asterisk dialplans while leading architecture and development decisions.

About this role

We’re looking for a Senior/Lead Java Developer with C background to help us build and scale a cloud PBX solution based on Asterisk.

The team is building a cloud PBX solution based on Asterisk. We expect you to have strong problem-solving skills, be self-motivated, initiative, and responsible.

Your daily duties will include implementing different SIP proxy features using Java/C and Asterisk with respect to high availability and scalability.

Responsibilities:

  • Collaborate with business stakeholders and actively participate in product planning and sprint backlog meetings.
  • Take responsibility for the full software development lifecycle, from understanding business requirements through coding, deployment, and maintenance.
  • Develop and maintain technical design, architecture, and troubleshooting documentation.
  • Demonstrate a technology-agnostic mindset and continuously explore new technologies and approaches.
  • Analyze and interpret stack traces, crashes, memory issues, and performance bottlenecks.
  • Implement patches, backports, or enhancements directly in Asterisk source code.
  • Develop custom modules (C), when needed.
  • Work with Linux systems (systemd, networking, tuning, kernel parameters).
  • Work with cloud environments (GCP preferred).
  • Participate in architecture decisions.
  • Design and implement Asterisk dialplans.

    • Requirements:

  • Have at least 7+ years of production experience with large-scale deployments.
  • Strong hands-on experience with Java
  • Hands-on experience with C
  • Have experience with CI/CD, clouds, Linux & networking.
  • Experience with CI/CD tools such as GitHub Actions, Jenkins, ArgoCD, and Maven.
  • Proficiency with relational databases, particularly MySQL, including schema design, migrations, and query optimization.
  • Have a good level of English (B2 or higher).
  • You are ready to act as the technical lead.
  • Can work cross-team with backend developers, infra/DevOps, QA, and product owners.
  • Own best practices, code quality, and documentation

    • We are pleased to offer:

  • Remote work as b2b contractor or on-site/hybrid employment (Belarus-Moldova) work opportunity!
  • Stable job with long-term growth perspective.
  • Competitive salary with annual performance review.
  • Really good hardware.
  • An exciting and challenging job with talented people around.
  • Continuous learning and career growth opportunities.
  • Compensation for professional training, seminars, and conferences.
  • Referral program – get rewarded for helping us grow the team with talented people.
  • Company-supported English classes to enhance your professional growth.
  • More perks for the Minsk and Chisinau office employees.

    • Skills

    ArgoCDAsteriskCCI/CDCloud PBXGCPGitHub ActionsJavaJenkinsKernel TuningLinuxMavenMigrationsMySQLNetworkingQuery OptimizationSchema DesignSIPSystemd

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