# Callsign North > Web and mobile development studio in Québec. New products or existing apps, for companies across Canada and the United States. Priced per project. Senior development studio · Québec. Well-built software. Made to last. 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 · A new product or an existing one. Two situations, one standard: solid, tested code that is easy to evolve. ### Greenfield · Start from scratch, on solid ground. We frame the product, choose the architecture and build a production-ready first version, designed to grow. - Product and technical scoping - Documented architecture - First version in production - Automated tests and deployment ### Brownfield · Take over what exists, without breaking it. We join your codebase and your team, stabilize, then modernize step by step while shipping new features. - Code and architecture audit - Prioritized technical debt - Migrations planned to limit downtime - Continuous feature delivery ## Method · AI speeds us up. Humans decide. 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. 1. AI agents: Explore, write and test the code. 2. Human review: Every change is read and approved by one of us. 3. Security checks: Automated tests, vetted dependencies, protected secrets. 4. Human go-ahead: Nothing ships without one of us signing off. 5. Delivery: Controlled releases, follow-up within the agreed scope. - Faster, without cutting corners: AI saves us time on repetitive work. We put that time back into quality, not shortcuts. - Your data, protected: AI tools, access and data handling are defined according to your project’s requirements and the terms of the selected providers. - Your success is the measure: We prepare the production release with you. Post-launch support is defined in our proposal. ## Services · What we build for you. We don’t sell a technology. We start from your project, then pick the right tools. - Mobile apps: iOS and Android, live on the App Store and Google Play. Fast, polished, reliable. - Web platforms and SaaS: Customer portals, SaaS and back offices: interface, APIs and backend delivered together. - Integrations: Your systems connected, without rebuilding everything. - Internal tools: Robust tools for your operations, designed with the people who use them. - AI integration and MCP: MCP servers that connect ChatGPT, Claude and your own agents to your systems, with access and permissions defined for your project. - APIs and backend: Secure, documented APIs, ready to grow with your product. ## Pricing · Priced per project. Never by the hour. 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. - A clear scope: We define together what is included, and what is not. - One price for the project: No meter running, no billed meetings. - Changes priced up front: If the scope changes, we price the change and you decide before we start on it. ## Our model · Two partners. Clear commitments. You work directly with the developers building your product. We agree on the scope, deliverables and terms together before work begins. - 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 · Close to you, wherever you are. Based in Québec, we work with companies across Canada and the United States, in English and French. - English and French: Your product, your docs and our conversations, in your team’s language. - Direct line: A direct channel to the team, not a ticket queue. - Canadian hosting: Hosting options in Canada based on project requirements. Data handling by other services is assessed separately. - Eastern Time: The same time zone as Toronto, Montréal and the US East Coast. ## Process · How a project runs. Four steps, every time. You always know where things stand and what comes next. 1. Scoping: We learn your needs, your constraints and your code if it exists. For an existing product, it starts with an audit. You get: A written scope, or an audit for an existing product. 2. Proposal: A clear scope, an architecture, a timeline and one price for the whole project. You know exactly what you are buying. You get: Scope, architecture, timeline and price. 3. Development: Systematic code review and automated tests. You follow progress at every demo. You get: A demo at every milestone. 4. Launch: Automated deployment, documentation and handover if your team takes over. Post-launch support is defined in the proposal. You get: Live product, documentation and handover. ## About · The people building it talk to you. 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. - Many domains: Healthcare, retail, finance, sports, entertainment: we have built and maintained apps people use every day. - Web, mobile and backend: The whole stack: interfaces, native apps, APIs and infrastructure. No need for three vendors. - Greenfield and brownfield: Just as comfortable launching a new product as taking over a codebase that is years old. - Self-directed: We make the technical calls, explain them and own them. You don’t have to manage us. ## FAQ ### Where are you based? In Québec, Canada. We work remotely with companies across Canada and the United States. ### Do you work in English and French? Yes, fluently in both, for your team and for your users. ### Which technologies do you use? 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. ### How much does a project cost? 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. ### What if the project changes along the way? We talk before we act. Every scope change is priced and approved by you before we start on it. No surprises on the invoice. ### Can you take over an existing app? Yes, it’s a big part of our work. We start with a code and architecture audit, then propose a prioritized plan. ### What do you deliver at the end of a project? 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. ### Can my AI assistant contact you for me? 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. ### Can you connect our systems to ChatGPT or Claude? 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. ### Do you use AI? 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. ### Are my code and data safe? 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. ## Contact Your project starts with a call. Tell us what you want to build. We’ll get back to you quickly with next steps. - contact@callsignnorth.ca - Using ChatGPT, Claude or another agent? Just ask it to write to us.