Freelance software developer

Custom software development with a single technical point of contact.

Tentacle Studio is the independent structure of Julien Ollivier, a freelance software developer helping companies design, build and maintain robust applications.

View services Meet Julien

Services

Services to design, build and improve your applications.

Mobile apps, backend, frontend, software architecture, technical audits and engineering workflow, with a direct and pragmatic approach.

Custom software development

Design and development of applications tailored to your business needs.

JavaKotlinC++TypeScriptPython

Android mobile apps

Robust mobile applications for business, field or product use cases.

AndroidJavaKotlinBluetoothREST

Backend & APIs

Backend services, APIs and integrations with your information system.

APIBackendPythonFlaskNodeJSParse Server

Frontend web

Clean, fast web interfaces adapted to real-world use.

WebTypeScriptNextJSReactUI

Software architecture

Audit, design and refactoring of architectures to make your applications more reliable.

ArchitectureQualityScalabilityRefactoringAudit

Tooling & engineering workflow

Git, workflows, quality, automation and development practices.

GitCI/CDDockerJenkinsTestsQuality

Julien

A single technical point of contact, from decisions to delivery.

Tentacle Studio is my independent structure. I am Julien Ollivier, a senior freelance software developer working directly on web, mobile, backend and architecture topics with a clear, pragmatic and sustainable approach.

Meet Julien

References

Trusted by

Selected client contexts where I contribute with discretion, rigor and careful attention to business and technical constraints.

Greenfield development of an Android application used to perform in-flight inspection of airport guidance equipment with a drone. The application connects to the drone and ground station, handles flight path configuration, uses an NTRIP server for centimeter-level positioning, processes real-time flight data and displays results as charts, with real-time mapping and FPV video feed.

Status Ongoing mission

Trust DSNA has trusted me with this mission for three years, and the development is still ongoing today.

Technologies

AndroidJavaObjectBoxBluetoothBluetooth LEGitGitLab

Development of a web application used to display in real time various data streams coming from an electronic board with an embedded microcontroller. The project is under NDA, so the presentation remains intentionally concise and does not go beyond that business-level description.

Status Ongoing mission

Trust I-Cube has trusted me with this mission for two years, and the development is still ongoing today.

Technologies

NextJSPython 3FlaskJavaScriptNodeJSParse ServerMongoDBGitGitLabCI/CD

View references

Studio

Internal projects as proof of product know-how.

Pétanque, Fantasy Racing and other in-house projects shape my product and engineering approach, separate from client references.

Pétanque : Marque Scores & Ma Pétanque

Available on Google Play

An Android application designed to track scores, preserve match history and analyze player and team performance. Plus a companion web service to access your data across all your connected devices and (soon) create and organize your competitions.

Mobile appAndroidJavaObjectBoxParse ServerNextJSMongoDBNodeJS

More details

Fantasy Racing

Available in Beta

A turn-based tactical racing game set in a medieval fantasy world, combining board games, racing games and sports games. Luck, strategy and dirty tricks will be your best weapons!

Video gameMobile gameAndroidJavaParse ServerMongoDBNodeJSAI