You’ll be working with PortaSIP, one of our flagship solutions. It’s a clusterable and highly scalable SIP softswitch that enables our customers to support enhanced voice applications such as hosted IP PBX service, unified messaging, conferencing, and IP call center, as well as a whole new class of services that integrate telephony with the web, e-mail, and other communications portals. PortaSIP combines two major VoIP network elements in one: a highly sophisticated softswitch for hosted IP PBX/IP Centrex services, and a very robust SBC. As with every PortaOne product, PortaSIP has an open architecture and source code, a lifelong unlimited license with no additional fees per subscriber or feature, and free updates. With PortaSIP, our clients can easily create new products and services, building a flexible and agile business.

Project Technologies

Python 2.7 and Python 3.4, PyPy, CPython, MySQL, Cassandra, Redis, Oracle, an asynchronous private library-based component.


You’ll join a team of six Python experts aiming to create the highest quality code. Our extensive code base and complex project architecture allow you to hone both programming skills and proficiency in integrating various services. We are proud to have a highly structured management system along with a friendly atmosphere, supporting each other with all the professional advice one might need.

Must-have skills and knowledge

  • 3+ years experience with network and/or system programming (Python/Perl/Ruby/etc.);
  • Experience working with Unix/Linux;
  • Experience with GIT/Gerrit;
  • Advanced coding techniques: reusability of code, low/middle-level network programming, ability to work with legacy code, code refactoring;
  • Experience working with asynchronous programming and understanding of its basic principles;
  • Extensive knowledge of OOP, OOD principles;
  • Proficiency in written English.


  • Knowledge of VoIP technology


  • Analysis, research, and coding of new software components;
  • Solving programming problems and optimizing legacy code;
  • Participation in code reviews, design, and documentation;
  • Maintenance and writing of auto-tests;
  • Documentation of low-level designs.

Key Objectives

  • Provide high-quality product, which meets the user expectations in terms of both functionality and stability (absence of coding/algorithmic errors).
  • Work both in a team environment and individually.
  • Mentor team in terms of technical questions.
  • Propose new areas of product development.
  • Follow a defined schedule and prioritize workload to meet deadlines.
  • Ensure project's deadlines are met.
  • Acquire new knowledge; demonstrate proactive learning and continuous development of the skillset.

We offer

  • Professional Development. At PortaOne you’ll be surrounded by experienced colleagues willing to share their knowledge.
  • Stability. We’ve been providing telecommunication solutions for 15+ years to 470 clients in 90 countries. The demand for our product in the modern world is only increasing with time. This means that you’ll join a growing business with interesting challenges and a stable income.
  • Plenty of options for professional development since every project is different. You’ll never get bored!
  • The highest programming standards and continuous improvement of processes. And we always aim to avoid unnecessary bureaucracy!
  • Flexible schedule and opportunity to work remotely.
  • Paid vacation and sick leave.
  • Competitive salary.
  • Team-building and corporate events.
Middle / senior Python developer

Toll-free calls (phone & Skype)
+1 866 747 8647
Calls & faxes from abroad:
+1 604 628 2508

PortaOne, Inc.
A113 – 2099 Lougheed Hwy,
Port Coquitlam, BC, V3B 1A8

Superb reliability and scalability with
24/7 professional technical support

Open architecture

Open architecture

PortaOne provides both APIs and source code for PortaSwitch to allow an easy integration
Scalability for growth

Scalability for growth

Our platforms can easily scale up by adding more servers to match your project success
Reliability and redundancy

Reliability and redundancy

Clustering and geo‑redundancy for high availability configuration and zero downtime updates
Agile development

Agile development

PortaOne delivers more than 20 software builds per year - new features are available every 7 weeks
24/7 technical support

24/7 technical support

Over 60% of our 300 engineers are in the technical support services, praised as the best in industry

Core solutions

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