Infrastructure and DevOps engineer - Telephony

Global migration is a 21st-century reality: Whether people are fleeing from something or racing towards better opportunity, finding love, or looking to experience new cultures, people are now living side by side in a new way. At Rebtel, we believe in tearing down borders – from the geographical borders that complicate international communication and money transfers to the cultural borders that keep people divided. We’re on a mission to build products serving the 2 billion modern internationals of the world. We offer work, communication, and remittance services for anyone that has crossed a border:
Our team mirrors our global audience:  we are a diverse team of people from 20 different countries that get together everyday – and we’d love for you to join us. Do you have what it takes?
 
Rebtel is looking for a Devops and Infra Engineer - Telephony
About Rebtel’s telephony infrastructure
Our infrastructure is entirely cloud-based, and we have components in the 3 major cloud environments (AWS, Azure, GCP). Our telephony infrastructure is at the core of our best-in-class international calling service.
In an environment as vast as Rebtel’s, it is important to maintain thorough documentation of our systems, but even better to persist our infrastructure as code using modern tools such as Terraform. Our work approach is well structured without being stifling. We use an agile workflow to handle day to day tasks. We strongly encourage collaboration as an excellent way to spread knowledge and to deliver universally relevant products and services.
Given our fast-paced journey and market ambition, you will find tasks that are demanding and that will trigger your creativity. At Rebtel, everyone contributes to our customer propositions - we have quick communication channels between teams and have regular hackathons to respond to opportunities and challenges as they come.
Rebtel is looking for a DevOps and Infrastructure engineer who will own the telephony area of our technological stack.
About you and your responsibilities

We’re looking for an individual who we can learn from and help us take our infrastructure to the next level.
We love to share the knowledge we have and to learn new things from you.
You have keen interest in architecture: how to build complex systems that are maintainable.
As an Infrastructure and devops engineer, your role will include actively contributing towards architectural decisions. You will discuss technical solutions with the rest of the team and act as an inspiration to improve and maintain system stability, availability, and security.
You are interested in problem solving and enjoy finding the simplest possible solution to complex problems.
You work well with teams, even in areas besides DevOps and infrastructure, but are also capable of performing as a sole contributor in your area

Requirements

Solid understanding of SIP and WebRTC protocols and common PBX servers such as Asterisk or FreeSwitch
Experience with GCP and preferably, also with Azure and AWS.
Sound knowledge of networking principles and common concepts such as firewalls, load balancers and application gateways and debugging tools such as Wireshark.
Experience with system administration on both Windows and *nix based platforms including scripting using Powershell and Shell.
Excellent communication skills in English

Bonus points

Experience with infrastructure-as-code tools such as Terraform and Ansible and code versioning tools such as Git.
Basic application development using one of the high level programming languages
Experience writing and automating system tests
Experience working with cross functional teams on mature products with many users
A proactive security mindset

Ideal candidate

3+ years full-time professional experience (i.e., 6k+ hours)
Committed to documenting and automating routine tasks
Raise the level of everyone around you
Happy hacking on new technology, loves R&D
Always curious, always learning
Vision for product development and for how a code base evolves
A pleasure to work with

What's in it for you?

Be a part of Rebtel's exciting growth story {2018=>75M USD, 2019=> 100M USD, 2020=> 150M USD, 2021 => 😉}
A chance to take responsibility and influence a global product
A chance to work with one of Stockholm's best tech teams
Work with cool new shiny tech
Perks: 10K SEK per year for self-improvement & travel, 30 vacation days, great pension and health plans, relocation support from anywhere on earth 😊

 
We are Rebtel. People from all around the world, as of now 20 countries and more to come. We believe in equal opportunity and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
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