Business tools & management platforms
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.
INDEPENDENT SOFTWARE STUDIO
sunnysides — independent software studio building private SaaS, software products, APIs and automation
Thoughtful software.
Built for your business.
We’re a small team of developers turning complex
challenges into software that just makes sense.
HUMAN-LED. AI-BOOSTED.
01 / WHAT WE DO
Software built
around your working day.
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.
Automation & workflows
Connect the tools you already rely on, orchestrate data and file processing, and remove repetitive manual work for good.
Custom software & dedicated systems
From web applications to native Windows software and on-device supervision agents: robust architectures sized to your hardest technical constraints.
02 / WHO WE WORK BEST WITH
Different sizes.
Same kind of problem.
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.
Solo operators, craftspeople & independents
You run the whole show, and your real craft is out in the field, not behind a desk. When quotes, schedule, purchases and invoicing live between a notebook and three spreadsheets, we build the one tool that pulls it all together — shaped around your working day, usable on the go, no over-engineered machinery.
Small teams & growing businesses
Your first hires have arrived, the basics are overflowing and information gets lost between colleagues. We automate the repetitive flows to free up time for the work that really matters.
Mid-sized to larger organisations with a hard problem
Workflows held together by spreadsheets and manual steps, or a complex architecture challenge others have shied away from. We automate 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.
03 / IN PRODUCTION
Real systems.
Running today.
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
File-processing automation platform
A SaaS, a public API and a native Windows 10 & 11 desktop client working together to run automated file-processing workflows.
- 75,000 automations a month
- 12 months in production
- Zero unplanned downtime
C# / .NET · Serverless cloud on AWS
ON-DEVICE AGENT + CLOUD SUPERVISION
Fleet management
Tracking, monitoring, reporting and remote control of a machine fleet, with a custom watchdog agent running on every device.
- 200 connected machines
- 7 months in production
C# agent · AWS
OUR OWN PRODUCT
sentin.io
A B2B SaaS we design, build and run ourselves. In private beta since October with its first customers and testers; early access opens soon.
- First customers since October
React · TypeScript · PostgreSQL
BUSINESS PLATFORM
Booking & operations platform
A tailored platform for a wellness studio: class scheduling, customer accounts and online booking, managed by the team day to day.
- Live with customers
Web platform
Not only web apps: we also build native desktop software and agents that run on your own machines.
04 / HOW WE WORK
Small team.
Clear thinking.
Real progress.
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.
01
Your business comes first.
We start with what you need to achieve, then find the right technical path. Not the other way around.
02
AI helps. People decide.
We use AI to accelerate the work, not replace the thinking. Architecture, quality and accountability stay with us.
03
Built for the long run.
Practical choices, maintainable code and software that can grow with your business.
05 / WHO WE ARE
Built by engineers.
Reviewed by experts.
sunnysides was founded by two brothers, 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
AI writes code.
It doesn’t know
what to build.
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
Something
on your mind?
A new product, a better system, a workflow that needs fixing.
Let’s start with a conversation.
Say hello hello@sunnysides-dev.com
We speak English and French fluently.
Write in whichever you prefer.