Full Stack Software Engineer

Mobilus Limited; Guildford; On-site; GBP 100,000 - 125,000; Full time

Job summary

A leading communications technology company in Guildford is looking for a Software Engineer to join their development team. This role focuses on designing and delivering backend features, integrating AI-driven voice services, and implementing CI/CD best practices. Ideal candidates will have 3-5 years of experience in SIP/VOIP environments, using Python or similar languages, and knowledge of Docker and Wireshark. The position offers a supportive work environment with excellent benefits including private healthcare and flexible working arrangements.

Benefits

Retail discounts

Private healthcare

Flexible working arrangements

Qualifications

• 3-5 years of experience in SIP/VOIP development.
• Proficient in Python or a similar object-oriented language.
• Familiarity with Docker and CI/CD practices.

Responsibilities

• Design and deliver backend features.
• Build and maintain integrations with AI-driven voice services.
• Turn requirements into clear technical designs and high-quality code.

Skills

SIP/VOIP development

Experience with Python or similar languages

Docker containerisation

Wireshark for trace analysis

Tools

Docker

Wireshark

Freeswitch

C/C++

Kamailio

MongoDB

MySQL

Kubernetes

Job description

We are delighted to be working in partnership with an established market leader in managed communications technology and systems integration who develop their own products. For over 40 years, they’ve been at the forefront of innovation, transforming customer experiences through smarter communications, automation, analytics and AI. They deliver transformative communication and CX solutions throughout the UK and internationally, supporting clients with global reach and ambition. As the business expands, they are looking to onboard a Software Engineer to join a small Software Development Team, as they expand and extend their enterprise-level SIP platform and its associated REST APIs.

The developer will be responsible for :

• Designing and delivering backend features
• Building and maintaining integrations with AI-driven voice services
• Turning requirements into clear technical designs and high-quality code
• Improving CI / CD and observability, hardening security by design, conducting code reviews and analysing SIP / RTP traces to troubleshoot issues
• 3-5 years’ experience of development in an SIP / VOIP environment, using Python or a similar object-oriented language
• Wireshark for SIP / RTP trace analysis / fault-finding
• Docker containerisation

Any knowledge of Freeswitch, C / C++, Kamailio, Auth0 / 0Auth, Mongo DB, My SQL, ArgoCD / Kubernetes or Web RTC would prove advantageous for this role.

This is a fantastic and exciting opportunity for an experienced Developer to work as part of a people-first company that holds exceptional staff retention rates and career development opportunities. The role comes with a generous benefits package, including retail discounts, private healthcare, flexible working arrangements and many more. If you’re ambitious, curious and can demonstrate loyalty as an employee, this is your chance to learn and grow your career in a company with pedigree, purpose and potential.

Please note that this is a permanent role seeking candidates with a track record of longevity of service with their previous employers

Software Engineer • Guildford, Surrey, United Kingdom