CO-OP ev · Back-end architect & developer
Designed and built the company's entire back end from scratch in Django: data model, API, architecture and the technical foundations.
Python freelancer · Django · FastAPI · AWS
Senior Python freelancer for your Django and FastAPI back ends.
15 years of Python, 11 freelance missions, 3 startups founded. I design, build and modernise back ends that hold up under load, alongside your team or from scratch.
Available from November 2026 · Fully remote from Limoges, France
>>> from pythonfreelance import vivien as me
>>> me.available, me.available_from
(True, '2026-11')
>>> me.missions[0]
Mission(client='CO-OP ev', role='Back-end architect & developer', period='2026-01 → 2026-10', stack=['Django', 'Python 3', 'PostgreSQL'])
Try:
A real prompt: Tab to complete, ↑ for history.
They trusted me
- L'Oréal
- Back Market
- Coty
- Saint-Gobain
- Alma
- Powens
- Karos
- WeeFin
- Syrocco
- CO-OP ev
- Edailabs
15years of Python
11freelance missions
3startups founded
AWS certifiedCloud Practitioner
Freelance missions
Eleven missions since 2021, from startups to CAC 40 groups, all remote from Limoges.
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10 mos
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4 mos
Karos Mobility · Back-end developer
Migrated the engagement platform to Braze and audited the existing code base of the commuter carpooling app.
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2 mos
Syrocco · Back-end developer
Upgraded projects from Python 3.9 / 3.10 to Python 3.13, reviewed and optimised code and development processes.
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3 mos
Back Market · Back-end developer
Python back-end development within the engineering teams of the refurbished products marketplace.
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6 mos
Coty · Back-end developer
Built a tool that automatically reconciles Shopify and PayPal payments into SAP.
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10 mos
L'Oréal · Back-end developer
Built Cloud Sustainability tooling: measuring and tracking the environmental footprint of the group's cloud resources.
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2 mos
Edailabs · Back-end engineer
Back end for a voice AI chatbot serving an iOS app: streamed audio in, speech-to-text, LLM query, then streamed text-to-speech out. Latency brought down to ~100 ms with gRPC.
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8 mos
Powens · Senior lead developer
Re-architected the monolithic API into FastAPI microservices for the open banking platform.
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4 mos
WeeFin · Back-end developer
New features in pure Python for ESG Connect, the ESG data platform.
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3 mos
Alma · Back-end developer · International squad
In the I18N squad: features enabling the fast roll-out of new countries for the instalment payment solution.
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6 mos
Saint-Gobain Glass France · Back-end developer
New features for the glass coater on the existing Django back end.
Before freelancing
Three startups founded, after early years in embedded systems and security.
Entrepreneurship
Tridea · Founder & CEO · back-end developer and architect
Online travel agency specialised in self-connecting flights (virtual interlining). Built from scratch: Flask then Django REST Framework API, Bitbucket CI/CD pipeline, Stripe payments, AWS infrastructure, transport supplier integrations (Amadeus, Distribusion, Save A Train, Duffel). Featured on Europe 1 radio.
Web To Store · Founder · back-end developer and architect
SaaS launched within Tridea letting any shop set up a Click & Collect store in under 15 minutes.
Streem · Self-employed founder
Jukebox 4.0: a new way for a venue's customers to interact with its playlist.
Embedded & security
INSIDE Secure · Field Application Engineer, previously Solution Delivery Engineer
Pre-sales and support for MatrixSSE (software protection) and MatrixHCE (mobile payment). Security study of the D-Link DCS-2310L camera for Black Hat 2015: two critical vulnerabilities found (unauthenticated video stream access, clear-text credentials).
NEOTION · Embedded systems developer
Fork of GDB + OpenOCD to build a debugging system for in-house processors. SmartCard reader designed from scratch and integrated into the QEMU emulator. C, Python, ARM assembly, USB, FTDI, AVR32.
Projects
What I build when nobody asks me to.
123Hector
LiveSaaS that reads, sorts and answers Google, Tripadvisor and Yelp reviews for hotels, restaurants, campsites and tourist attractions: every review read, every reply written in the venue's own voice, neighbours compared, and what to fix this week.
RappelRadar
ArchivedAlerts you as soon as a consumer recall affects a product you bought.
PromoPeers
ArchivedLet influencers share affiliate links and promo codes, and their followers find the best deals.
What I can do for you
From a complete back end to a one-off audit, always in Python.
Back end from scratch
Launching a product? I design and build the whole back end in Django or FastAPI: data model, API, authentication, payments, deployment. As I did for CO-OP ev in 2026.
Senior reinforcement
A senior Python developer who joins your team within days, works autonomously on the hard topics, and leaves tested, documented code behind.
Migrations & modernisation
Python upgrades (3.9 → 3.13), Flask to FastAPI, splitting a monolith into microservices, tooling migrations (Braze, SAP…). Without downtime.
AWS cloud & infrastructure as code
AWS certified. Scalable, cost-aware architectures: EC2, S3, RDS, Lambda, VPC, described in Terraform and shipped through CI/CD.
Code & performance audit
A review of your Python code base with a concrete report: technical debt, security, performance, process. Then the fixes, if you want them.
AI & real-time back ends
Speech-to-text → LLM → text-to-speech pipelines, gRPC streaming, models integrated into your products. Latency under control (~100 ms at Edailabs).
About
Python back-end developer since 2011, freelance since 2021. I started in embedded systems (C, ARM, debugging in-house processors) before moving to the web, which left me with a taste for code that runs fast and rarely falls over.
In between, I founded Tridea, an online travel agency specialised in self-connecting flights, and Web To Store, a Click & Collect SaaS: API, CI/CD, payments, AWS infrastructure, all of it went through my hands.
Today I work with scale-ups and large groups (L'Oréal, Back Market, Coty, Alma, Powens, Saint-Gobain) on Django and FastAPI back ends, migrations and cloud architecture. I also teach at engineering schools: TDD, Python, Django, Flask, FastAPI, OOP.
- Teaching
- Lecturer at engineering schools: TDD, Python, Django, Flask, FastAPI, object-oriented programming.
- Security
- Two critical vulnerabilities found in D-Link cameras (2014): unauthenticated video stream access and clear-text credentials.
- Languages
- French (native), English (full professional (C1)), Spanish (limited working), Hungarian (elementary), Chinese (elementary)
- Education
- Master's degree in real-time and embedded systems, Ingésup (Y-Nov Aix-en-Provence) (2011–2014) · Two-year technical degree in business computing (BTS), Beaupeyrat, Limoges (2009–2011)
- Certifications
- AWS Certified Cloud Practitioner (Amazon Web Services) · C1 Advanced (Cambridge English)
Machine readable
Screening profiles with an AI assistant? Hand it one of these addresses: it will find my up-to-date track record in a format it understands.
/llms.txtMarkdown summary for LLMs/resume.jsonresume in JSON Resume format/cv-en.htmlResume (PDF) · HTMLapplication/ld+jsonSchema.org data in the page
Let's talk about your project
A back end to build, a migration to run, a team to reinforce? Describe the context in a few lines, I reply within 24 hours.
Phone
+33 6 21 43 30 87
LinkedIn
linkedin.com/in/viviengiraud