Senior Software Engineer Backend - ai - Paris H/F Aircall

Aircall is a unicorn AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, faster resolutions, and scale. We're redefining what a customer communications platform can be-by combining voice, SMS, WhatsApp, and AI into one seamless workspace.
Our momentum comes from a simple but powerful idea: help every customer-facing team work smarter, not harder. Aircall's AI Voice Agent automates routine calls, AI Assist streamlines post-call tasks, and AI Assist Pro delivers real-time guidance that helps people do their best work. The result-companies grow revenue, deliver faster resolutions, and scale service.
We've built a product customers love and a business that scales fast. Aircall operates in nine global offices (Paris, New York, San Francisco, Sydney, Madrid, London, Berlin, Seattle, and Mexico City), and is backed by world-class investors. Our teams are shipping AI innovation faster than ever and expanding across new product lines and markets.
At Aircall, you'll join a company in motion-ambitious, profitable, and product-driven-where impact is visible, decisions are fast, and growth is real.
How We Work at Aircall:At Aircall, we believe in customer obsession, continuous learning, and delivering extraordinary outcomes. We value open collaboration, taking ownership, and making smart, informed decisions with speed and precision. If you thrive in a fast-paced, team-driven environment where curiosity, trust, and impact matter, you'll fit right in
As a Senior BE & AI Engineer, you will be responsible for the design, development, deployment, and operation of business-critical AI features that add customer value on top of Voice. Previous experience implementing AI features is a must. Best practices, evangelization, and mentoring in your team and across the whole of Engineering will be part of your day to day job.Quality, excellence, and agility drive our delivery processes and you will help us level these up. Using a variety of back-end stacks, appropriate for each requirement, but always hosted on AWS, we build added value and resilient services on top of voice and fully integrate with our customers' business critical tools (CRM, Helpdesk, E-Commerce, ...).
Your mission @ Aircall:

- Participate in requirements analysis to help with providing the right technical and business solutions for our customers
- Propose innovative solutions based on AI landscape trends
- Have key responsibilities within the design, architecture, and end-to-end delivery of AI key modules
- Write clean scalable code and test and deploy applications and systems
- Revise, update, refactor, and debug code
- Be part of an engineering organization delivering high quality, secure, voice solutions to Aircall clients
- Involvement in product and platform performance optimization and live site monitoring
- Participate in an on-call rotation to respond to critical system issues and ensure continuous system reliability
- Mentor team members

A little about you:

- AI experience is a must for this position: Knowledge about LLMs (GPT, Mistral, Llama, Claude, etc...) and experience developing with them (usage, prompting, etc), AI frameworks (Langchain, LlamaIndex, Auto Gen, etc), AI architectures (RAG, reranking, etc)
- You have at least 5+ years of experience in back-end development in a large scale, preferably typed language (Typescript/, Java, Scala), with experience in Javascript, Ruby, or Python, with a focus on delivering for security, scalability, availability, and performance
- Nice to have: Ideally you will have worked with AWS in a production environment and understand how to design for, deploy on and get the best out of, the environment and services provided by Amazon
- Security is at the forefront of your mind in everything that you do

Why join us?
Key moment to join Aircall in terms of growth and opportunities Our people matter, work-life balance is important at Aircall Fast-learning environment, entrepreneurial and strong team spirit 45+ Nationalities: cosmopolite & multi-cultural mindset Competitive salary package & benefits
DE&I Statement:At Aircall, we believe diversity, equity and inclusion - irrespective of origins, identity, background and orientations - are core to our journey.
We pride ourselves on promoting active inclusion within our business to foster a strong sense of belonging for all. We're working to create a place filled with diverse people who can enrich and learn from one another. We're committed to ensuring that everyone not only has a seat at the table but is valued and respected at it by providing equal opportunities to develop and thrive.
We will constantly challenge ourselves to make sure that we live up to our ambitions around diversity, equity and inclusion, and keep this conversation open. Above all else, we understand and acknowledge that we have work to do and much to learn.
Want to know more about candidate privacy? Find our We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.