Senior Backend Software Engineer, Routing Squad

About Diabolocom 🚀

Diabolocom is a leading European provider of AI-first, cloud-based contact centre (CCaaS) and customer experience (CX) solutions. We help companies deliver seamless, personalised customer experiences at scale.

Our platform combines proprietary, purpose-built AI technology for customer service, native telecom infrastructure, and deep CRM integrations. This allows us to automate tasks, elevate data quality, and empower agents across all customer touchpoints.

Trusted by over 400 clients, with deployments in more than 60 countries across Europe, North America, South America, and the Middle East, Diabolocom blends the agility of SaaS innovation with carrier-grade voice performance. With eight offices worldwide and over two decades of experience, we are 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 Routing Squad.

About the Routing Squad 🗺️

Due to company growth and the increasing complexity of our existing routing system, we're forming a new squad – the Routing Squad.

This squad will own the system that connects customers to the right agents, which is the core of our platform. We will build and maintain the routing engine that decides which agent handles each interaction, whether it's a phone call (incoming or outgoing), an email, a chat, an SMS, or a social media message. Our work will include managing agent availability and skills, as well as queue logic, routing rules, and priorities.

In the upcoming year, we plan to:

• Extract the routing module from an existing service into a separate microservice to improve overall platform stability and speed up development by separating responsibilities.
• Adapt the routing system to challenging market demands by unifying inbound and outbound channel routing, adding interaction scoring, implementing a weight distribution system, and introducing customizable routing rules and more.

Technical Stack:

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

The team currently consists of:

• 1 Backend Developer
• 1 Product Manager
• 1 Team Lead

We're aiming to grow to a team of up to 10 people across domains (Backend and QA Engineers, and Product Managers).

What We're Looking For 👀

• 7+ years in software development within product-focused companies, with at least 3+ years working extensively in Java.
• 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