Senior Telephony Engineer

Job Title

Job Description

So, who are we? 
Hello, we’re IG Group. We are a publicly-traded FTSE250 FinTech company who run mobile, web and desktop platforms that help our clients trade stocks & shares, leveraged products, Futures & Options and Crypto.

We are ambitious. Over 340,000 people already use our platforms. We’re global with offices in 18 countries and products in 16 regions. We’re hungry to move faster, ship better product for our customers and grow our user base. We believe in high autonomy, and we want people who are looking to do things differently in order to create better experiences for our customers.

We work in cross-functional teams and are laser focused on increasing the number of active clients we serve to drive sustainable growth.

Your team
The team plays a critical role in ensuring the stability, scalability, and efficiency of our telephony environment, serving clients around the world. This position offers a blend of project and operational responsibilities, focused on both maintaining and evolving our Telephony infrastructure to meet the needs of a fast-paced, high-availability business.

Your role in the Team’s Success
We are looking for an experienced Senior Telephony Engineer to join our technology team and lead the design, deployment, and support of our enterprise-grade voice systems. In this critical role, you will ensure secure, reliable, and compliant voice communications across our trading desks, branches, and corporate offices. Your expertise will directly support business continuity and the fast-paced demands of financial services

What you’ll do

• Design, configure, and manage VoIP and UC systems ( Avaya,    Microsoft Teams) across high-availability financial environments.

•  Ensure secure, compliant telephony systems aligned with industry   regulations (FINRA, SOX, PCI-DSS).

• Lead projects involving system upgrades, cloud migrations, and unified communications integration.

•  Implement and manage SIP trunking, call routing, voicemail, auto-attendants, E911, and disaster recovery protocols.

• Monitor voice infrastructure performance and quality; ensure uptime and low-latency communication for trading operations and critical teams.

• Conduct deep-dive troubleshooting using diagnostic tools like Wireshark; resolve latency and call quality issues rapidly.

•  Maintain detailed documentation for configurations, call flows, and recovery procedures.

•  Collaborate with internal network, security, compliance, and support teams, as well as external telecom vendors.

•  Provide Tier 3 support and mentor engineers or help desk staff on voice technologies and troubleshooting.

What you’ll need for this role

• 8 - 13 years of experience supporting and engineering enterprise telephony systems, ideally in a financial or regulated environment.

•  Expertise in VoIP protocols (SIP, RTP) and enterprise voice platforms: 

Avaya Aura / IP Office

Microsoft Teams Voice

Genesys Cloud

•  Strong understanding of call recording, compliance monitoring, and secure voice transmission.

•  Experience with SBCs, SIP trunking, PRI, QoS, VLANs, and network traffic engineering for voice.

• Hands-on experience with packet capture and analysis tools (e.g., Wireshark).

• Strong understanding of business continuity and disaster recovery in voice environments.

How we work
We try to take a thoughtful approach to our ways of working as a company. We follow a hybrid working model with 3 days in the office – which we think balances the need to collaborate effectively and connect with each other. When it comes to how we deliver, there are 5 things we want everyone to do to drive high performance, better learning and career satisfaction:

•    Lead and Inspire: Drives trust, alignment, and enthusiasm
•    Think Big: Focus on the problems that most impact commercial outcomes
•    Champion the client: Understand and prioritise client's needs
•    Deliver at pace: Push for fast, sustainable growth; 
•    Raise the bar: Take ownership, be accountable and share feedback

We believe that diversity is vital to success, it fuels creativity, drives innovation and sets us up for global success. We’re committed to building teams with a variety of perspectives and skills to help us realise our vision and strategy, that’s why we encourage applications from people with diverse backgrounds and experiences to join us on this journey.

The Perks
Your growth fuels our success! Thrive with tailored development programs, mentoring opportunities with leaders, and clear career progression. Expand your network through committees, sports and social clubs. Enjoy extra time off for volunteering and community work. 

• Matched giving for your fundraising activity
• Flexible working hours and work-from-home opportunities
• Performance-related bonuses
• Insurance and medical plans
• Career-focused technical and leadership training's in-class and online, including unlimited access to LinkedIn Learning platform.
• Contribution to gym memberships and more
• A day off on your birthday
• Two days’ volunteering leave per year

Join us for this exciting journey!

Apply now!

Number of openings