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5 months ago
Salary: Competitive salary
Location: London
Job type: Permanent
Sector: IT
Category: Development Jobs
O2 is the commercial brand of Telefónica UK Limited, a leading digital communications company owned by Telefónica S.A. With over 25 million customers across the UK, O2 is one of the world’s most innovative companies putting our customers at the heart of everything we do.

We are much more than just a network. We open up the endless possibilities of technology, connecting our customers to the things that they love and exploring new ways to open up the world for them.

We are always on the lookout for great talent. Just like our customers, we offer our employees more. From a choice of benefits, rewards, training and ongoing career development there are many reasons to join O2.

About The Team

Telefónica currently has 15,000+ public Wifi services in the UK, O2 Wifi’s premium hotspots are managed through partnerships with key venue owners where we operate innovative business models to support a free and open for all access model for end users, no matter which mobile or broadband provider they are with. This role requires a passionate production engineer to expand on the existing infrastructure and support the current platform.

About You

We are looking for someone who has the ability to diagnose complex solutions on the fly, have the ability to challenge senior management, showing their ability to review strategic intent and demonstrate a rational and objective argument. They must be able to provide an in depth understanding of customer and supplier organisations and add value to company wide planning processes and can make material contributions to the company strategy. They must also have an understanding of how O2 service and offerings interrelate and how they are received by customers, knows how this contrasts with the competition.

About The Role

Production Engineers at Telefonica are hybrid software/systems engineers who ensure that Telefonica’s services run smoothly and have the capacity for future growth. They are embedded in every one of Telefonica’s product and engineering teams, and are core participants in every significant engineering effort underway in the company.

Keep critical systems up and running despite network errors and configuration errors. Coding is key for how everything is managed and maintained. Production engineers will have source-level access and moral authority required to fix, extend and scale code to keep it working, harden it against the vagaries of the Internet, and develop our own large scale complex platforms.



• Experience building high quality distributed systems or backend services.

• Extensive experience in one of the following - Java, PHP, Python or scripting experience in Shell and Perl

• 2+ years of experience in network theory e.g. TCP/IP, UDP, ICMP, etc., MAC addresses, IP packets, DNS, OSI layers, and load balancing

•Ability to learn new software, frameworks and APIs

•Ability to communicate effectively at different levels.


• Experience composing docker containers.

• Exposure to AWS


We are looking to pay a competitive salary (depending on experience) for this position, and in addition we have some great benefits such as a bonus, life cover, health care, holiday entitlement and lots of flexible benefits too.

Telefonica`s commitment to a great work-life balance allows us to consider flexible approaches to working. Like to know more? Feel free to raise it.

Joining Telefonica means opening up a world of freedom, support and possibility. A fascinating world where you`ll be able to think bigger, be bolder and try new things. And where there are endless opportunities to develop your career.

There`s so much to discover. Your adventure starts here

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