Software Developer

£65,000 DOE | Hybrid Working (1x day a month office)Are you a seasoned developer with a passion for building robust, real-time communications platforms? Looking for a role where you can work on complex, enterprise-grade systems while still being close to the technical detail?This is an opportunity to join a well-established technology business with a strong reputation in communications and cloud-based solutions. Youll be part of a small, highly skilled development team working on the evolution of a large-scale SIP platform and its associated APIs, with plenty of scope to influence design, tooling, and future direction.The RoleWorking closely with the Development Manager, youll play a key role in enhancing and extending an existing SIP and VoIP platform used in production environments. This is a hands-on role suited to an experienced developer who enjoys solving complex protocol-level problems, building secure services, and integrating with third-party systems.Youll contribute across the full software lifecycle

from design and development through to troubleshooting live issues, while helping to improve development standards, security practices, and platform resilience.Key ResponsibilitiesDesign, develop, and enhance a production SIP/VoIP platform and supporting servicesBuild additional value-added services and integrations around the core platformDevelop integrations with external systems, including AI-driven services such as speech recognition, transcription, and analyticsEnsure secure design and implementation across software and infrastructureDiagnose and resolve complex SIP, RTP, and platform-level issuesContribute to secure development processes and compliance with recognised security standards (e.g. ISO27001, PCI-DSS)Collaborate closely with other engineers and stakeholders, sharing knowledge and best practiceEssential Skills & ExperienceStrong, hands-on experience with SIP/VoIP technologies and protocols (e.g. SIP, SDP, RTP, RFC2833/4733)5+ years experience developing in Python or another object-oriented languageSolid understanding of object-oriented, Senior Full-Stack Engineer / Software Developer / JavaScript Engineer (Node.js / React / Next.js - AWS Serverless) London (Hybrid - Farringdon Tues/Weds/Thurs) £85k-£90k + Bonus + Excellent Benefits Discretionary bonus (10%), Private Healthcare, 25 Days holiday, 5%..., Excellent opportunity for a Senior Software Developer to play a key role in architecting, developing, and enhancing our clients in-house trading and research systems. This is an opportunity to work on greenfield projects, influence architectural decisions, and directly...

design principlesExperience building and consuming HTTP/REST APIsFamiliarity with Python frameworks and tooling such as Flask or Django, Pytest, SQLAlchemy, MarshmallowStrong background in secure systems design (software and network level)Proven experience using Wireshark for SIP/RTP analysis and fault-findingVersion control experience with Git-based platformsContainerisation using DockerStrong Linux experience (Ubuntu-based systems)Excellent communication skills, comfortable working with both technical and non-technical stakeholdersDesirable / Nice to HaveExperience with FreeSWITCH (configuration and/or source code exposure)Working knowledge of C or C++Experience with KamailioAuthentication and authorisation frameworks (OAuth2, Auth0)Databases such as MongoDB and MySQLCI/CD pipelines (e.g. GitHub Actions)Kubernetes, ArgoCD, or similar deployment toolingWebRTC experienceWhats on OfferSalary up to £65,000 depending on experienceHybrid working model24 days annual leave plus bank, Senior Software Developer BathAre you an experienced Software Developer passionate about collaborative development and fostering growth in others? A dynamic company in Bath is looking for a Senior Software Developer to join their innovative team.Their Culture:They thrive...

holidaysPension and life assurancePrivate medical insuranceBirthday day off and paid volunteering dayCycle to Work schemeRetail and lifestyle discount programmesInterested?If youre an experienced developer looking to work on technically challenging, real-time systems in a supportive and forward-thinking environment, wed love to hear from you. Apply now to learn more.

Permax Recruitment Limited £100,000 Permax Recruitment is working in partnership with a London based firm who are on the lookout for a Software Engineer. For nearly a century, our client has been building a firm as accountants, auditors, tax specialists and close advisors to clients operating in emerging..., Press Tab to Move to Skip to Content Link Select how often (in days) to receive an alert: Title: Senior Consultant Software Developer Requisition ID: 8006 Amey are a leading provider of full life-cycle engineering, operations, and decarbonisation solutions, for..., Overview Uneek have partnered with a leading energy company who provide cutting-edge cleantech solutions in their search for a Senior SDET to join their team. Their mission is to help utilities transition to a more sustainable, customer-focused future. Senior Software..., Permax Recruitment is working in partnership with a London based firm who are on the lookout for a Software Engineer. For nearly a century, our client has been building a firm as accountants, auditors, tax specialists and close advisors to clients operating in emerging...