v4.3.0
feat
Custom Software Development
End-to-end builds — from architecture to first deploy — scoped to what the business actually needs, not what's trendy.
+412−18
main · accepting new projects
Software you won't
have to rebuild.
Jakub Kozinski is an independent software developer based in Bordeaux, France — designing, coding, and maintaining digital solutions for businesses that need systems built right the first time.
feat: new builds
fix: legacy systems
chore: maintenance
// daily driver: editor, terminal, coffee
about
Code is a craft. Maintenance is the proof.
Jakub Kozinski works with companies across France and the wider EU on custom applications and digital solutions — usually starting from a specific, well-scoped problem rather than a vague brief.
The focus stays narrow on purpose: build software that's easy to maintain from day one, then stay close to it — through updates, dependency changes, and the small fixes that keep a system healthy long after launch.
Most projects fall into one of three buckets: a product that needs building, a codebase that needs stabilizing, or a system that's been left unattended and needs a maintainer who actually reads the logs.
- LOCATION
- Bordeaux, France
- FOCUS
- Custom software & app maintenance
- LANGUAGES
- French, English
- WORKS WITH
- Businesses across France & the EU
services
Changelog
What working together usually looks like — described the way software describes itself.
v4.1.0
feat
Digital Solution Architecture
Technical specs and system design for new products, worked out before a single line of implementation code is written.
+186−4
v3.8.0
chore
Application Maintenance & Support
Ongoing upkeep for applications already in production: monitoring, dependency updates, patches, and incident response.
+94−211
v3.2.0
fix
Legacy System Modernization
Migrating older codebases onto current frameworks and infrastructure without breaking what already works for users.
+267−340
v2.6.0
refactor
Technical Audits & Code Review
An independent read of an existing codebase — its health, its risks, and what it would take to make it maintainable.
+58−112
process
How a project moves
Five stages, in order — the way a build pipeline actually runs.
01
Discover
Understand the problem, the constraints, and who's actually going to use this.
02
Scope
Turn that into a concrete plan: what gets built, in what order, and what "done" means.
03
Build
Write the software — with version control and tests, and code the next person can read.
04
Ship
Deploy, verify in production, and hand over documentation that's actually useful.
05
Maintain
Stay on: updates, monitoring, and fixes — for as long as a maintainer is needed.
stack
Tools of the trade
The languages and infrastructure most projects end up running on.
LANGUAGES
JavaScript / TypeScript
Python
PHP
FRONTEND / BACKEND
React
Node.js
Django
Laravel
DATA & INFRASTRUCTURE
PostgreSQL
Redis
Docker
OVHcloud / AWS
feat
Product Engineering
From interface to database — building the parts users see and the parts they don't.
chore
Ongoing Maintenance
Watching what's already live, so small problems get fixed before they become incidents.
contact
Let's build something that lasts.
Based in Bordeaux, working with clients across France and beyond.
Bordeaux, France
Jakub Kozinski
Software development, coding, and application maintenance. Get in touch to talk through a project, however early-stage it is.
ADDRESS
60 Rue Pelleport, 33800 Bordeaux, France
PHONE
+33 7 59 40 43 58