Location	Gatineau, Quebec
Email	contact@charleslanglois.dev
LinkedIn	linkedin.com/in/charles-langlois
Github	github.com/DrPyser
Website	www.charleslanglois.dev
Phone (home/VoIP)	+1 (819) 486-0249
Phone (SIP)	sip:8194860249@charleslanglois.dev

I am a software developer based in Gatineau, with 8+ years of real experience building distributed systems, VoIP/telecom solutions, and automation platforms.

My hobbies & interests include music , cooking 🍳 , gardening , computer science & IT, programming, technology , telephony , cinema .

I’m always passionate, curious & rigorous in my work, and find satisfaction in building deep technical expertise in whatever specific domain I find myself working in. I’m constantly working on cultivating a wealth of conceptual and practical knowledge, and understanding in the domain of software, technology, and beyond.

Experience

Software engineering 🧑‍💻

2022-2026 Senior Software Developer, Backend (Full-Time) @ Wazo Communication Inc.

Development and maintenance of an IP PBX/UCaaS solution targeting service providers for small to medium businesses.

• Development and maintenance of multiple python microservices integrated through REST APIs & RabbitMQ event bus
• Configuration, programming and operation of Asterisk PBX based-systems
• Load testing & performance optimization
• E2E Design & implementation of LLM-enabled automatic voicemail transcription pipeline
• Open-source development & community support (wazo-platform)
• SIP-based VoIP & telephony
• Development & maintenance of an SMS messaging integration component
• Project management disciplines: Agile, Lean
• Onboarding & mentoring of colleagues
• C application debugging using gdb (crash / coredump analysis, deadlock analysis)
• Technical documentation (wazo-platform.org)
• Usage of AI coding agents (claude & cursor, agent skill development)

2021-2022 Business & Integration Arch Specialist (Full-Time) @ Accenture Song

Development and maintenance of domain-specific solutions on various internal projects.

2020-2021 Digital Software specialist (Full-Time) @ Accenture Song

Development and maintenance of domain-specific solutions on various internal projects.

2019-2020: Digital Software analyst (Full-Time) @ Accenture Song

Development and operation of internal marketing technology platform, automated reporting & analytics, domain-specific automation.

• Back-end software development in Python
• Microservice architecture & integration patterns (12 factor application principles, event-driven integrations)

Migrating/developing and administrating linux servers infrastructure & application deployment environments

• Multi-node deployment infrastructure using Docker Swarm
• Integration of DevOps practices (CI/CD, infrastructure as code/configuration management, container-based deployment infrastructure and workflow, SRE, …)
• Agile & Kanban project management
• Google Cloud Platform operation and exploitation (basics)

2017-2019: Back-End developer (Full-Time) @ Konversion

Development of internal automation and data analytics platform in marketing ecosystem

• Back-end web application development in Python(Django framework API, relational storage backend)
• Paid search advertisement & SEO principles with Adwords/GoogleAds & BingAds
• DevOps (Container-based virtualization & deployment pipeline using Docker )

2016: Web Developer/Webmaster (Internship) @ La Scena Musicale

Maintaining and developing capabilities of WordPress website for a popular cultural magazine

• WordPress backend & frontend development
• Webmastering/website administration

Developing and operating tools for automating magazine publishing process

• Design & implementation of tool to generate specialized HTML targeting print design software (using Racket programming language)

2015: Mobile Application Developer (Internship) @ PureCobalt

Development of mobile application targeting iOS platform

• ActionScript 3 /Flex mobile application development
• SQLite database integration, Salesforce integration

Education 🧑‍🎓

2014-2022: Université De Montréal - Bachelor in Computer Science

(include part-time work / study)

Core computer science curriculum & specializations,

• Computer security (ciphers, cryptography, networking security, penetration testing)
• Theoretical computer science (computability, complexity)
• Introduction to Artificial Intelligence (classical and modern approaches)
• Programming languages and compilation: design and implementation of compilers (Scheme, x86_64 ASM)

Extra-curricular credits

• Musical programming in Python (school of music)
• Logic 2 (school of philosophy)
• Linguistics: Introduction to semantics, morphology & lexicology

Open source & Personal projects

2026: theatre.py

Actor-model concurrency framework in Python, inspired by Erlang/BEAM and UNIX

2026: charlesnetfs

Experiment in using 9P virtual file system protocol for network management

• Implementing a 9P file server in Rust to provide a network-transparent interface to a fleet of servers in homelab network context
• Test-driven development
• Bug report led to improvement of ninep upstream library crate

2026: Contributions to strux.sh

Open-Source framework for fast & easy development, provisioning and management of linux-based Kiosk hardware devices

• Contributions to typescript/Bun/Go codebase
• BATS-based integration testing framework

2025-2026: Contributions to Xalgorithm DWDS

Rule-as-data & Internet of Rules FOSS project

Development of backend component in Rust: Rule Taker

• Rust programming & maintenance
• Implementation of text parsers in Rust

2025-2026: Exfetch AUR package

Author & Maintainer of an Archlinux User Repository (AUR) package for the Exfetch shell extensible fetching program

2023-2026: www.charleslanglois.dev

Personal blog website

Built with the Hugo static site generator

Skillset 🤹

• Programming languages
  • Python (professional, 8+ years)
  • Haskell
  • Lisp (Racket, Clojure, Common Lisp, Scheme)
  • Rust
  • Lua
  • Javascript
  • C
• Web programming
  • protocols: HTTP, websocket, webhooks
  • API styles (XMLRPC/SOAP, JSONRPC, REST, GraphQL ), HTTP asynchronous polling
• VoIP & telephony
  • Asterisk PBX (configuration, pbx_config dialplan, pbx_lua dialplan, AGI/AMI/ARI)
  • Protocols: SIP, analog, IAX2
• DevOps & infrastructure
  • Networking
    • VLAN
    • VPN: openvpn, wireguard
    • tunneling (gretap)
    • Cisco Integrated Service Router configuration
    • HP ProCurve switch configuration
    • consumer routers: OpenWRT & Tomato (installation, configuration, management)
  • Containerization/virtualization
    • Docker (docker swarm, docker-compose)
    • Proxmox/KVM/QEMU
    • Openstack (usage)
    • LXC
    • k3s
  • Configuration Management: Ansible , SaltStack
  • Logging infrastructure: syslog, systemd-journald, fluentd, fluent-bit
  • Monitoring infrastructure: Prometheus
  • CI/CD: Jenkins , CircleCI , Zuul
• Cloud computing: concepts & principles, AWS, Google Cloud Platform
• Storage technology
  • Relational/SQL: PostgreSQL, SQLite, MySQL
  • Document-oriented: MongoDB, PostgreSQL+JSON
  • Graph-oriented: Neo4J/Cypher
  • Queues/log-oriented: Kafka, RabbitMQ
  • In-Memory/caching: Redis
• Shell programming/CLI tooling: bash , make, POSIX/unix, fish
• Operating Systems
  • Linux: Arch Linux, Debian, Ubuntu, Fedora, NixOS, Alpine, OpenWRT
  • Windows: 2000, XP, 7, 8, 10, WSL
  • freeBSD: OPNSense, TrueNAS
• Software testing
  • property-based testing with Hypothesis Python library
  • snapshot-based testing
  • Test-Driven Development
  • load testing using Locust framework
  • test runners: pytest, Python unittest standard library
  • mock-based testing using unittest.mock
  • integration testing using docker/docker-compose, mockserver
  • acceptance / functional testing using behavior-driven development and Behave framework
• AI coding agents
  • harnesses & IDE
    • claude code
    • cursor
    • opencode
  • Agent skills development
  • On-device local models using ollama
• AI/LLM models (Claude haiku/sonnet/Opus, Mistral Voxtral Mini, GLM, Opencode Big Pickle)

Natural languages

• French (native)
• English (fluent)