INDEPENDENT SOFTWARE STUDIO
Thoughtful software.
Built for your business.
We’re a small team of developers turning complex
challenges into software that just makes sense.
01 / WHO WE WORK BEST WITH
You don’t have to be a tech company. If your week runs on notebooks, spreadsheets, or keeping everything in your head, there’s something worth fixing.
You run the whole show, and your real craft is out in the field, not behind a desk. Quotes, scheduling, purchases and invoicing are scattered across different tools. We bring them together and automate repetitive admin that adds no value, with one tool shaped around your working day, usable on the go, without unnecessary complexity.
Your first hires have arrived and information gets lost between colleagues. Re-entering the same data, sending routine reminders and compiling reports take time without adding value. We automate those tasks so your team can focus on customers and the work that matters.
Disconnected systems, repeated manual handoffs, or a complex architecture challenge others have shied away from. We connect your tools, automate tasks that add no value reliably at scale, and engineer systems built to last.
WHAT WE CARE ABOUT
We measure success in more than numbers. The best projects make someone’s working day better: fewer repetitive tasks, fewer late evenings fixing what a machine should handle, more time for the work people actually enjoy.
We don’t take on projects we don’t believe in.
02 / WHAT WE DO
From the tools your team runs on to the automation
quietly working in the background. We build what off-the-shelf software can't do for you.
Scheduling, quotes, client portals, activity tracking. One interface shaped around your trade, usable in the field and at the desk, without the weight of a standard package.
Connect the tools you already rely on, orchestrate data and file processing, and remove repetitive manual work for good.
From web applications to native Windows software and on-device supervision agents: robust architectures sized to your hardest technical constraints.
03 / IN PRODUCTION
Not everything we build belongs in a portfolio, our clients’ names stay private. What we engineered for them doesn’t have to.
CLOUD PLATFORM + WINDOWS DESKTOP APP
A SaaS, a public API and a native Windows 10 & 11 desktop client working together to automate file processing, removing repetitive handling so the team can focus on work that adds value.
Windows software in C# / .NET · Cloud platform
ON-DEVICE AGENT + CLOUD SUPERVISION
Tracking, monitoring, reporting and remote control of a machine fleet, with a custom watchdog agent running on every device.
On-device software · Cloud supervision
OUR OWN PRODUCT
A B2B SaaS we design, build and run ourselves. Live today, with its first customers since October.
Web platform
BUSINESS PLATFORM
A tailored platform for a wellness studio: class scheduling, customer accounts and online booking, managed by the team day to day.
Web platform
Not only web apps: we also build native desktop software and agents that run on your own machines.
04 / HOW WE WORK
You work with the people who build your software. No layers, no handoffs. Just a close collaboration from the first conversation to the final details.
We start with what you need to achieve, then find the right technical path. Not the other way around.
We use AI to accelerate the work, not replace the thinking. Architecture, quality and accountability stay with us.
Practical choices, maintainable code and software that can grow with your business.
05 / WHO WE ARE
sunnysides was founded by engineers trained at Télécom Paris and CentraleSupélec. We design, write and maintain the code ourselves, so the people you talk to are the people who build.
Behind us, senior mentors (CTO, PhDs in computer science and decades of industry experience) review our architecture and guide us daily.
You always talk to the people building your solution.
06 / A WORD ON AI
A stand mixer doesn’t make you a pastry chef. A jigsaw doesn’t make you a cabinet maker.
Tools are extraordinary. They give more speed and more reach to the person who already knows the craft. In the wrong hands, they simply make mistakes faster, and more convincingly.
Software is no different. AI writes code beautifully and has no way of knowing whether it’s the right code. It needs guidance: someone who understands your business, your users, your constraints and your edge cases. Someone who asks why before how, reads the output closely, makes the architecture choices, and is still answerable for them three years from now.
We use AI every day. It doesn’t make our decisions.
Yes, this site too. It was assembled with an AI-assisted tool, then read, corrected and finished by hand, which is exactly the arrangement we’re describing.
07 / LET’S TALK
A new product, a better system, a workflow that needs fixing.
Let’s start with a conversation.
We speak English and French fluently.
Write in whichever you prefer.
