Senior Backend Software Engineer, Voice Squad

Diabolocom

Senior Backend Software Engineer at Diabolocom, developing core services in AI-first communication platforms. Focused on high-performance telephony and distributed system design.

Posted 5/19/2026full-timeRemote • 🇫🇷 FranceSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsJavaKotlinPostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

In the context of our exponential growth, we are strengthening our internal engineering team and opening a Senior Backend Software Engineer position in our Voice Squad.
Voice Squad is the software core of our CCaaS telephony. It is responsible for the core technical services that ensure secure, high-performance processing of phone calls on the Diabolocom platform. It manages critical components related to call routing, media stream handling and other voice related services.
Introduce Telephony as a Service that will be part of Omni-channel as a Service.
Perform massive optimization and refactoring to enable faster feature delivery.

Requirements

What you’ll need

7+ years in software development within product-focused companies, with at least 3+ years working extensively with Java/Kotlin.
Experience working with relational databases (PostgreSQL preferred).
Experience with Spring Boot would be a plus.
Experience in designing and implementing effective distributed systems. Ability to make architectural decisions and evaluate their impact on system performance, scalability, and reliability.
Strong autonomy and leadership potential, with a willingness to grow into a lead role.
Comfortable working with and improving an existing codebase.
Strong engineering culture, attention to the details, business-centric mindset.

Benefits

Comp & perks

A collaborative and multicultural environment with a team that fosters professionalism, values innovation, and encourages knowledge-sharing.
Work on cutting-edge distributed communication systems in a fast-growing company, with real opportunities to make an impact.
Opportunities to take on new challenges and advance your career.
High-quality IT equipment of your choice.
Flexible work arrangements and remote work options.
Regular team-building events.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaKotlinPostgreSQLSpring Bootdistributed systemssoftware developmentcode optimizationrefactoringsystem performancescalability

Soft Skills

leadershipautonomyattention to detailbusiness-centric mindset