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Software Engineer - Backend at Aircall
Paris, FR
Aircall was founded in 2014 and is now one of the fastest growing B2B SaaS companies in the world. Its main mission is to bring value to voice communications by focusing on user experience, collaboration and integration with other softwares. With $40 million in backing from Balderton, Draper Esprit, NextWorld Capital and eFounders and supported by the successes of our 5,000+ customers from Expensify, Pipedrive, Travelperk, Adore Me and Sendinblue, Aircall and its international team of 200 talented people is addressing a growing market of $50+ billion.
At Aircall, we are looking for engaged and passionate Software Engineers to join our growing Engineering Team. In the next few years, our technical challenge is to leverage fully decoupled architecture and microservices at scale with reliable, event-driven infrastructure behind the scenes.
Volume: Store, aggregate and compute 1M+ events/day today, 100M+ by next year
Live: Analyse and take live decisions based on 1M+ events/day
Modularity: Make our stack scale and increase squads' productivity by featuring microservices based on event-driven architecture
Uptime: Keep a 99.99% uptime while dealing with an exponential activity growth
We have built and successfully operated +8 microservices since 2019, and that's just the beginning. There are impacts and changes at all levels: architecture, infrastructure, software, organization, and business.
As we scale our stack, we are scaling our team. The engineering team is organized in Chapters, Tribes and Squads. These agile, autonomous, stable, and multidisciplinary squads focus on a specific business scope driven by customer-centric objectives and key results.
Since 6 months, we built and successfully operated +8 microservices, and it’s just the beginning. Impacts and changes are at all levels, architecture, infrastructure, software, organisation and business.
As we scale our stack, we are scaling our teams. Engineering team is organized by Chapter, Track and Feature Squad. Agile, autonomous, stable and pluridisciplinar squads are focused on a business scope driven by ambitious customer centric objectives and key results.
As a Backend Engineer, you will contribute to design, development, deployment, operation of business critical features that add customer value on top of Voice. You will also grow as Engineer, mentored by Senior peers.
Quality, excellence and agility drive our delivery processes and you will help us level these up. Using mainly Ruby, Sinatra, MySQL, Redis, hosted on AWS, we are building added value, resilient services on top of voice and fully integrated with our other customers’ tools (CRM, Helpdesk, E-Commerce, …).
Please find more details about our stack here.

Deliver features with great added value

    • Add insightful value top on voice communication such as live voice transcription (speech to text), auto-tagging, sentiment analysis… in real time and at scale (think about 1M calls/ day :)
    • Add innovative features on our live call routing engine
    • Ensure a cross-channel experience from desktop to mobile
    • Give technical insight on the product roadmap
    • Participate to the Quick Win and Bug days

Improve our technical stack and our productivity by tooling

    • Set-up an event-driven architecture with real-time data analysis
    • Dockerize the whole stack for easier development

Evolve in a strong Engineering Culture

    • Assist and give internal presentations during the Engineering Meetings and Friday Fundamentals
    • Challenge and commit to the quarterly technical roadmap
    • Evolve in the Management, Engineering tracks with frequent and continuous feedbacks from One On One, peer feedbacks


    • You are a problem solver, no matter the language
    • You use to work on a complex product and to interact with other technical teams (frontend, data, backend, mobile,...)
    • You know how to work using at least one of these frameworks in production : Rails, Sinatra, React, Angular, Backbone, Phoenix, Ember
    • You use to work with best practices and design patterns.
    • You have an experienced on one (or more) of this following languages : Ruby, Javascript, Go, Elixir, Scala, Java, Python, Typescript
    • You write unit and integration tests on your code
    • You are open-minded and proactive (that is truly important!)
We are looking for enthusiastic folks who are ready to innovate and make an impact for the better. Community, transparency, ambition and team work — these are the values by which we live, as individuals and as a team. We believe that success comes from hard work and deserves to be recognized and rewarded.
What we offer:
- A competitive environment where you can get responsibilities
- Sunny offices in the center of Paris with ping-pong table, free food/drinks, and regular team parties
- Immersion in the Parisian startup ecosystem, and an opportunity to work with some of the most promising startups
- Competitive package (health coverage, lunch, commute, sport)
- Yearly team offsite to exotic locations bringing together our Paris and NYC team

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