Senior Backend Software Engineer, Core Squad

About

Diabolocom is the leading European provider of AI-first cloud contact center (CCaaS) and customer experience (CX) solutions that help organizations deliver seamless, personalized interactions at scale.

Our cloud platform combines proprietary AI technology, native telecom infrastructure, and deep CRM integrations to optimize contact center operations for medium to large companies. As a licensed telecom operator, we deliver carrier-grade voice quality, support high call volumes, and provide phone numbers worldwide.

Our AI services are purpose-built for customer relations, helping teams automate tasks, improve data quality, and enhance operational efficiency. These capabilities are fully integrated into our cloud contact center platform and are also available through multilingual APIs.

Diabolocom empowers Customer Service and Sales teams to manage both inbound and outbound interactions through an advanced dialer, while providing real-time monitoring, analytics, and seamless integrations with leading CRM systems.

Trusted by more than 400 clients and deployed in over 60 countries, Diabolocom operates from offices across Europe, the USA, Brazil, and the UAE. The company has been consistently recognized for innovation and leadership in AI-powered customer experience, including the 2024 Frost & Sullivan AI Leader award and the 2026 Frost & Sullivan Technology Innovation Leadership award.

Job Description

About Diabolocom

Diabolocom enables organizations worldwide to build brand loyalty and drive sales growth. Our innovative, cloud-based contact center solution leverages AI-driven technologies to optimize the customer experience. We empower Customer Service and Sales teams to handle inbound and outbound interactions seamlessly across multiple channels, ensuring premium voice quality, real-time analytics, and robust global scalability.

Our platform integrates with leading CRMs and offers a wide range of APIs and services in multiple languages. With offices in Europe, the USA, Brazil, and the UAE, and 350+ clients operating in 60+ countries, we are constantly evolving and seeking talented individuals to join our team.

In the context of our exponential growth, we are strengthening our internal engineering team and opening a Senior Backend Software Engineer position in our Core Squad.

About the Core Squad

The Core Squad is responsible for the design and development of all key entities of our product, ensuring proper interaction between other squads and services. We also realize the isolation of entities within our application to achieve the convenience of large customers.

As part of the Core Squad, you will:

Design, build, and optimize back-end services for data gathering, processing, and delivery.

Ensure high-quality engineering practices with thorough test coverage, robust metrics, alerts, and clear documentation.

Define and maintain service contracts to ensure seamless communication between systems.

Work closely with the product team to align technical solutions with customer needs.

Technical Stack:

Languages: Java, Kotlin

Framework: Spring Boot

Database: PostgreSQL

Message Broker: RabbitMQ

Caching: Redis

Containerization: Docker

Our team currently consists of:

3 QA engineers

2 backend developers

2 frontend engineers (shared between two teams)

1 team lead

What We’re Looking For:

7+ years in software development within product-focused companies, with at least 3+ years working extensively in Kotlin (preferred) or Java.

Experience working with relational databases (PostgreSQL preferred).

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 innovative team environment.

The opportunity to work on cutting-edge distributed communication systems.

Career growth opportunities within a fast-growing global company.

Flexible work arrangements and remote work options.

Recruitment Process: 

Technical challenge on HackerRank platform

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

At Diabolocom, diversity and inclusion are in our DNA. All qualified applicants will receive equal consideration for employment without regard to color, language, religion, sex, sexual orientation, gender identity, national or social origin, opinion disability, age.

Additional Information

  • Contract Type: Full-Time
  • Location: Paris
  • Possible full remote