Senior Backend Software Engineer, Voice Squad

Diabolocom; Paris; À distance; EUR 90 000 - 120 000; Plein temps

Avantages offerts par ce poste

Flexible work arrangements

Remote work options

Regular team-building events

High-quality IT equipment

Résumé du poste

Diabolocom, a leading AI-first cloud contact centre provider, seeks a Senior Backend Software Engineer for the Voice Squad. You will design and implement scalable backend services, focusing on distributed call handling and system reliability in a fast-growing environment.

Bring 7+ years of software development experience, 3+ years with Java/Kotlin, and strong PostgreSQL expertise. The role offers remote-friendly, hybrid work options and growth into engineering leadership.

Qualifications

• 7+ years of software development in product-focused companies.
• At least 3+ years working extensively with Java/Kotlin.
• Experience with relational databases, PostgreSQL preferred.
• Spring Boot experience would be a plus.
• Ability to design and evaluate distributed systems for performance and reliability.
• Strong autonomy and leadership potential, aiming to grow into a lead role.
• Comfortable with existing codebases and high engineering standards.
• Business-centric mindset and attention to detail.

Connaissances

Java/Kotlin

Go

Distributed systems

PostgreSQL

Leadership potential

Outils

Spring Boot

Docker

RabbitMQ

Redis

Description du poste

About Diabolocom

Diabolocom is a leading European provider of AI-first, cloud-based contact centre (CCaaS) and customer experience (CX) solutions that help companies deliver seamless, personalised customer experiences at scale. The platform combines proprietary, purpose-built AI technology for customer service, native telecom infrastructure, and deep CRM integrations to automate tasks, elevate data quality, and empower agents across all customer touchpoints.

Trusted by 400+ clients, with deployments across more than 60 countries in Europe, North America, South America, and the Middle East, Diabolocom combines the agility of SaaS innovation with carrier-grade voice performance. With eight offices worldwide and more than two decades of experience, the company is committed to advancing customer loyalty and growth through sovereign, intelligent, and scalable communication technology.

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.

About the 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.

Voice provides information to all parts of the system to help our clients observe agents and their business in general.

What’s next for the Voice Squad?

In the coming year, we plan to:

• 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.

Technical Stack:

• Languages: Java 25, Kotlin 1.9, Go
• Framework: Spring Boot 3.x.x
• Database: PostgreSQL
• Message Broker: RabbitMQ
• Caching: Redis
• Containerization: Docker

The team currently consists of:

• 3 QA engineers
• 5 backend developers
• 1 team lead

What We’re Looking For:

• 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.

What We Offer:

• 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.

Recruitment Process:

• Intro call with a Talent Acquisition Manager
• Live coding challenge
• Design interview through screen sharing with our Lead Software Engineer
• Final interview with Alexander, our Head of Software Engineering

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