Investigo • Liverpool, United Kingdom

Senior Telecoms Developer

Employment type:  Full time

3–4 days/week at home

4.5-day week

Core hours 10–4

Apply now

Job Description

Position Title: Senior Telecoms Developer

Reporting To: Telecoms Director

Location: Remote, UK

Job Type: Full-Time Permanent

*Security Clearance Required*

Please note that the successful candidate will need to go through Security Clearance, as such you'll need at least 5 years consecutive stay in the UK.

About us:

Come and be a part of The Investigo Group (TIG), a dynamic coalition of cutting-edge tech firms specialising in Platform, Software, Data, AI and other bleeding-edge technology solutions. Our innovative prowess spans the globe while proudly hailing from the United Kingdom.

The group is multi-functional with a large portfolio of B2B products and services.

Our ecosystem is made up of: IIS, Providing secure internet access in both the public and private sectors. Its mission? To deliver world-class secure internet capabilities enhancing productivity across diverse skillsets and organisations. Vestigo Consulting is our training and consultancy company, tailored around specialist sector-specific knowledge, and provides regular courses and CPD for our community. The Consultancy side concentrates on expert support of our customers as well as specifically assigned individual deployments. CollaborAIte is a bleeding-edge company that provides our Data and AI capability. A collaborative partner for designing user-centred secure data solutions to overcome operational hurdles, delivered through design thinking and agile coaching.

Diversity, Equity, and Inclusion (DEI) are at the heart of The Investigo Group (TIG). We're dedicated to creating a workplace where people from all backgrounds are not only welcome but empowered to excel. We actively seek diverse talent, promote fairness, and foster an inclusive environment where every voice matters, driving innovation and progress in our dynamic tech community.

The group provides bespoke, secure, user-centric products fuelled by deep technical knowledge advanced data and analytical skills.

We proudly stand as a global leader in this space, partnering with esteemed entities that require these advanced forward-thinking capabilities. These partnerships have been forged from our understanding of customer challenges, as well as our expertise in developing world-leading enterprise product sets.

Join us at TIG, where innovation knows no bounds, and together, we'll shape the future of technology solutions for a safer, more efficient world.

About the Role

As a Senior Telecoms Developer, you will play a crucial role in developing ground-breaking communications products. Your focus will be on the architecture and development of new, security-aware telecoms products that prioritise stability and reliability, especially for life-critical systems. This is a unique opportunity to contribute to a project that is vital for our users' safety and connectivity.


Qualifications and Requirements:

  • Strong experience in Linux and bash scripting.
  • A foundational knowledge of SQL database systems
  • Profound knowledge of PBX, VoIP, and cloud-enabled UCaaS solutions, with a preference for experience in Asterisk.
  • At least 5 years of experience in a communications/telecoms provider role or similar.
  • Familiarity with webservers would be beneficial

Preferred Education:

  • A degree in a numerate discipline such as Maths, Physics, Computer Science, Engineering, or equivalent work experience.

Essential Technical Skills:

  • Familiarity with VoIP/SIP, PBX systems including Asterisk, SMS/SMPP platforms.

Soft Skills Required:

  • Ability to work independently while being an active participant in an agile environment.
  • Innovative thinking with a focus on continuously improving our products and solving real-world problems for users.


  • Private Medical
  • Inclusive Culture: Enjoy an inclusive culture and environment.
  • Flexible Benefits: A flexible benefits allowance to suit your needs.
  • Holiday: Generous holiday allowance.
  • Learning: Access to continuous learning and development opportunities.
  • Bonus Potential: Bonus potential based on performance and business-related factors.
  • Discounts: Discounts on a wide range of products and services.
  • Pension: Pension scheme contributions.
  • More Benefits: Explore additional benefits on our career site. Click here

How to Apply

Please note that the talent acquisition team is managing this vacancy directly and we do not require agency support.

Candidates who are successful will be required to undergo relevant security checks.

Our Process
Our talent acquisition team will be in touch if you're successful, the team will arrange a short screening call (max 30 minutes) to learn more about you, and what you are looking for and answer any questions you may have. If all goes well, the team will share your profile with the hiring manager for review. Our interview process is tailored to each role but typically the first half of the process is run remotely with a final stage on-site.

For this position, you can expect a two-stage interview process:

1st stage - An informal 30-60minute video call with the hiring team to discuss your skills and relevant experience. This is an excellent opportunity to learn more about the role and ask any questions.

2nd Stage – A 60-minute formal interview where you can expect both competency and technical questions. This can be held either in-person or remotely.

As an inclusive employer, please inform us if you require any reasonable adjustments.

Equal Opportunities

Here at TIG we are committed to equal opportunities and value diversity, equity and inclusion at our company. We do not discriminate based on race, religion, colour, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

As a Group, we seek to ensure that individuals with disabilities receive reasonable accommodation throughout the hiring process and ultimately within the job itself. Please contact us to request any accommodations.

Company benefits

4.5-day week
Season ticket loan
Birthday off
Enhanced maternity leave
Adoption leave
Cycle to work scheme
Faith rooms
Commuter loan
Mental health platform access
Employee discounts
Volunteer days
Lunch and learns
Charity donation scheme
Financial coaching
Employees are very happy with their working location freedom
Employees are largely happy with the flexibility in the hours they work
Employees are very happy with the benefits their company offers
Work-life balance
Employees feel that they can switch off quite easily from work
Role modelling
Employees feel that most people work flexibly
Employees feel they have complete autonomy over getting their work done

Working at Investigo

Company employees


Gender diversity (male:female)


Office locations

London, Birmingham, St Albans, Milton Keynes, New York, Philadelphia, San Diego

Hiring Countries

United Kingdom
United States

Awards & Achievements

Most flexible companies

Most flexible companies

Flexa100 2024
Recruitment & HRTech

Recruitment & HRTech

Industry awards 2023

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