Senior development studio · Québec
We design new products and evolve the ones you already have. Web, mobile and backend: an AI-equipped workshop, run by experienced developers, in English and French.
Engagements
Two situations, one standard: solid, tested code that is easy to evolve.
Greenfield
We frame the product, choose the architecture and build a production-ready first version, designed to grow.
Brownfield
We join your codebase and your team, stabilize, then modernize step by step while shipping new features.
Method
AI speeds up every step of development. Our setup is carefully configured to turn that into real speed, with security guardrails at every step. And one of us always stays accountable for the result.
AI saves us time on repetitive work. We put that time back into quality, not shortcuts.
AI tools, access and data handling are defined according to your project’s requirements and the terms of the selected providers.
We prepare the production release with you. Post-launch support is defined in our proposal.
Services
We don’t sell a technology. We start from your project, then pick the right tools.
iOS and Android, live on the App Store and Google Play. Fast, polished, reliable.
Customer portals, SaaS and back offices: interface, APIs and backend delivered together.
Your systems connected, without rebuilding everything.
Robust tools for your operations, designed with the people who use them.
MCP servers that connect ChatGPT, Claude and your own agents to your systems, with access and permissions defined for your project.
Secure, documented APIs, ready to grow with your product.
Pricing
We agree on the scope and a fixed price for the agreed deliverables. The proposal specifies applicable taxes, third-party service costs and payment terms.
We define together what is included, and what is not.
No meter running, no billed meetings.
If the scope changes, we price the change and you decide before we start on it.
Our model
You work directly with the developers building your product. We agree on the scope, deliverables and terms together before work begins.
| Your project | Callsign North |
|---|---|
| Your contact | The people building your product |
| The team | Senior developers only |
| The technology | Whatever fits your project |
| Quality | Tests, code review and documentation defined in the scope |
| After delivery | Code your team can keep evolving |
| The bill | A price per project, not by the hour |
Here and beyond
Based in Québec, we work with companies across Canada and the United States, in English and French.
Process
Four steps, every time. You always know where things stand and what comes next.
Start a project ↗We learn your needs, your constraints and your code if it exists. For an existing product, it starts with an audit.
You getA written scope, or an audit for an existing product
A clear scope, an architecture, a timeline and one price for the whole project. You know exactly what you are buying.
You getScope, architecture, timeline and price
Systematic code review and automated tests. You follow progress at every demo.
You getA demo at every milestone
Automated deployment, documentation and handover if your team takes over. Post-launch support is defined in the proposal.
You getLive product, documentation and handover
About
Callsign North is two developers with years of experience across many kinds of apps. We started the studio to put that experience straight to work for our clients. No account managers, no juniors: you work with us.
Healthcare, retail, finance, sports, entertainment: we have built and maintained apps people use every day.
The whole stack: interfaces, native apps, APIs and infrastructure. No need for three vendors.
Just as comfortable launching a new product as taking over a codebase that is years old.
We make the technical calls, explain them and own them. You don’t have to manage us.
FAQ
Can’t find your answer? Write to us.
In Québec, Canada. We work remotely with companies across Canada and the United States.
Yes, fluently in both, for your team and for your users.
The ones that fit your project. We don’t push a stack: we look at your needs, your team and what already exists, then choose.
We price by project, not by the hour. After the first call, we send a proposal with a clear scope and one price for the whole project.
We talk before we act. Every scope change is priced and approved by you before we start on it. No surprises on the invoice.
Yes, it’s a big part of our work. We start with a code and architecture audit, then propose a prioritized plan.
You receive the source code and deliverables specified in the contract, with the agreed tests and documentation. The contract sets out the rights transferred; third-party components remain subject to their licenses. Your team can take over.
Yes. Ask ChatGPT, Claude or your own agent to email contact@callsignnorth.ca with a description of your project. We answer every request, whether it comes from you or your agent.
Yes. We build MCP (Model Context Protocol) servers that give AI agents controlled access to your data and actions, with authentication, permissions and audit logging.
Yes, every day, within clear rules. AI agents take the repetitive work; one of us reads, tests and approves every change before it goes to production.
We define security measures around your project’s data and requirements: access, secret management, testing and dependency checks. The use of AI tools and their data handling terms are clarified before project code or data is shared with them.
Start a project
Tell us what you want to build. We’ll get back to you quickly with next steps.
Using ChatGPT, Claude or another agent? Just ask it to write to us.
More and more people ask ChatGPT, Claude or Grok to find them a vendor. This is what those assistants see of us, and what they can do for you.
Plain text written for machines: our business card for AI. llms.txt
It reads our profile and answers your questions about our services, pricing and how we work.
With your OK, it writes to contact@callsignnorth.ca with a description of your project.