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We have a great opportunity for a Technical Engineer to join our team. 

Working with Project Managers and Technical Architects (Leads), the Technical Engineer deploys and tests Semafone solutions for our clients. The role also includes 3rd line support of existing customers. This Engineer will have a mix of experience spanning Linux, telephony and enterprise application integration.

The role will report directly to the VP Of Customer Care & Infrastructure and will have daily update to the Project Managers. Internally the role will interact closely with all areas of the Customer Care & Infrastructure team and will need to have a close relationship with the product development and hosted services teams. There will also be regular interaction with client technical resources as required. 

Key Accountabilities and Responsibilities       

  • Build, test and deploy customer solutions as defined in low level design and test documentation
  • Update and maintain low level design documentation throughout the delivery process as and when required to ensure “as built” documentation is provided to the support team when required.
  • Assist the Technical Architects to troubleshoot and resolve technical faults/issues with the integrations during the deployments.
  • Be actively involved in product research and development, prototyping and documenting new functionality, technical solutions and testing strategies
  • Become a Semafone product subject matter expert (SME) – fully experienced in deployment of all Semafone products/components – carry out installation/deployment coaching and training to 1st/2nd level product support engineers and customer engineers where relevant. 

Key Competencies

  • Telephony SIP & TDM configuration & troubleshooting
  • Installing, configuring and troubleshooting Linux OS based environments
  • Creating and maintaining VMs in a VMware ESXi environment
  • Working knowledge of TCP/IP networking – firewalls and routers
  • Customer-facing and communication skills
  • Good problem-solving and trouble shooting skills
  • Attention to detail and ability to work under pressure
  • Production of high quality documentation
  • Operate comfortably with internal and external project stake holders
  • Team player willing to work flexible hours
  • Strong written and spoken English language skills
  • IT-based degree level qualification or equivalent
  • IT knowledge to the required level

Key Skills & Experience


  • Cisco ISR configuration & troubleshooting
  • TDM technologies – E1/T1, ISDN (Q.931 variants)
  • VOIP protocols / codecs - SIP, RTP, DTMF, RFC2833, G711, G729


  • Network infrastructure –Switches, Routers, Firewalls, Load Balancers
  • Network protocols and applications - VLANs, IP, TCP, UDP, DNS, NTP, HTTP, HTTPS, IPsec, LDAP, SSH
  • Security - Best practice, Firewalls, encryption, access control, authentication mechanisms, PKI, Certificates
  • Nagios / SNMP / OSSEC/ Splunk/ Syslog monitoring tools
  • Considerable experience of 3rd-line support services in a software/ telecommunications environment


  • Web Technologies – HTML, JavaScript, Ajax
  • SOAP & XML Web Services

Desirable Skills & Experience:

  • CRM integration – CTI popup, frontend & backend integration, iFrame embedding
  • Delivering Payment Service Provider integrations
  • Delivering PA DSS & PCI DSS solutions Exposure to Java or .NET programming 

Benefits & Culture

We are a market leader in secure voice transactions and trusted by our customers and partners.  We are on a journey to secure all personal data.  We recruit diverse, ambitious, innovative people who want to grow in a supportive and collaborative environment.  We are passionate, work hard, have fun and celebrate success.

What we'll give you;

  • 25 Days Holiday
  • Competitive Salary
  • Up to 10% Bonus
  • 4 x Salary Life Insurance
  • Vitality Health Insurance
  • HealthShield Cash Back Plan
  • Employee Assistance Programme
  • Up to 5% Contributory Pension

Semafone is well funded and growing fast, you’ll be joining an organisation that combines an entrepreneurial ‘start-up’ culture with the professionalism of a mature and established business. This is a fabulous opportunity to gain experience on a variety of commercial matters of an international business.

Semafone are operating with strength throughout the pandemic and are offering a fully flexibile working environment to their employees, at this point in time.

*All final interview candidates will be subject to a DBS check as a pre-condition of a potential offer of employment. Any information found will be considered when making the final hiring decision. Please be aware that the background check process will not go ahead without your written consent.

Or, know someone who would be a perfect fit? Let them know!


Pannell House
GU1 4HN Guildford Directions 0845 543 0822 View page

More than just a job...

Here at Semafone it's all about delivery and we pride ourselves in providing a flexible working environment which aims to support our staff as they journey through their career.  

For country-specific benefits check out each job role, but what else do you get besides your all important salary?

  • Work / Life Balance

    We offer excellent time off benefits and promote flexible working whenever we can.

  • Great Physical Space

    We've got fabulous new offices in all locations. All mod-cons and tech'd up to the rafters it's a technologist's dream location.

  • Team Events

    We regularly get together as either individual teams, location-specific or the whole business. A highlight is our annual offsite, 'FraudSTIR' which involves internal and external presentations, team-building activities and lots of opportunities for socialising!

Workplace & Culture


Our company values aren't just words on a page to us.  They're intrinsic to the way we operate and vital to our success.  When they're effectively demonstrated wonderful things happen, so it's no wonder we recruit to our values and culture.


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