Python Developer

Proactive.IT Appointments; Guildford; Hybrid; GBP 55,000 - 65,000; Full time

Job summary

A leading technology company in Guildford is looking for a Senior Python Developer to enhance their SIP platform and integrate AI-based services. Candidates should have over 5 years of Python experience and a solid grasp of software design principles. Strong understanding of REST APIs, along with communication skills, is essential. This role offers hybrid working arrangements and benefits like private medical insurance, pension, and additional days off for birthdays and volunteering.

Benefits

Pension and life insurance

Private Medical Insurance

Birthday day off

Volunteering day off

Cycle to Work Scheme

Qualifications

• 5+ years of Python programming experience required.
• Strong understanding of OO design principles is essential.
• Excellent communication skills for all audiences required.

Responsibilities

• Design and develop the SIP platform and services using Python.
• Building voice recognition and sentiment analysis services.
• Ensure secure software design and compliance.

Skills

Python programming

Object-oriented design

REST APIs

Flask

Django

SQLAlchemy

Communication skills

Git/GitHub

Tools

Wireshark

MongoDB

MySQL

Job description

Senior Python Developer

Location: Guildford
Hybrid Working (one day per month required onsite)
Contract: Full-time, Permanent
Salary: £55,000 – £65,000 (DOE)

About the Company

More than just a reseller, my client develops in-house software and offers professional services, focusing on business communications, contact centres, unified communications, networking, AI, automation, and systems integration. They are committed to delivering value, mitigating risks, and building trusted relationships with their customers.

My client fosters a supportive, innovative, and customer-focused culture, offering extensive learning and career development opportunities. Joining them means being part of a team dedicated to professional growth and technical excellence.

The Role

My client is seeking a Senior Python Developer to join their software development team. You will work on expanding and improving their enterprise-level SIP platform and associated REST APIs.

Key Responsibilities

• Designing, developing, and enhancing the SIP platform and associated services using Python
• Building value‑added services and integrations, including AI‑based voice recognition, transcription, and sentiment analysis
• Ensuring secure software design and development at all levels
• Troubleshooting and resolving SIP/RTP and platform‑related issues
• Contributing to secure development processes and policies, ensuring compliance with standards such as ISO27001 and PCI‑DSS

Qualifications

• 5+ years of Python or other object‑oriented programming experience
• Strong understanding of OO design and software development principles
• Experience with HTTP/REST APIs
• Familiarity with Flask or Django, Jinja, Pytest, SQLAlchemy, Marshmallow
• Secure software and systems design (software & network level)
• Understanding of SIP/VoIP protocols (SDP, RTP, RFC2833/4733) is highly desirable
• Experience with Wireshark for SIP/RTP troubleshooting
• Git/GitHub or equivalent version control
• Excellent written and verbal communication skills for both technical and non‑technical audiences
• FreeSWITCH configuration and/or source code knowledge
• C/C++ for open‑source troubleshooting
• Auth0 / OAuth 2.0
• MongoDB or MySQL
• GitHub Actions CI/CD or similar
• WebRTC

Benefits

• Pension and life insurance
• Private Medical Insurance
• Birthday and volunteering day off
• Cycle to Work Scheme

Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation.