2,067,974open jobs
125,550companies
241,889added this week
Browse all
Salary
$98k – $112k per year
Location
In office (Billy-Berclau)
Employment
Freelance

First seen by Alion on Sep 23, 2026.

Overview
Company
Impact
Profile match
Castelis is a French digital services company that designs, secures and operates digital solutions, from bespoke applications to AI agents in production. It is certified ISO 27001:2022, compliant with GDPR and rated Platinum by CyberVadis in 2025, and it hires C# and .NET developers and infrastructure architects. The company is based in France.

Dans le cadre du développement d'une application métier, nous recherchons un développeur C#/.NET capable d'intervenir sur l'ensemble du cycle de vie du projet, depuis la conception jusqu'à la mise en production, en lien direct avec les métiers.

  • Développement d'une application from scratch en C#/.NET

  • Conception, développement, tests et mise en production

  • Contact direct avec les équipes métiers pour le recueil et l'affinement des besoins

  • Contribution active tout au long du cycle projet (analyse, développement, recette, déploiement)

Profil recherché

  • Expérience confirmée en développement C#/.NET

  • Autonomie et capacité à intervenir sur l'ensemble du cycle de développement

  • Bon relationnel, à l'écoute du client et des équipes métiers

  • Anglais : lu, écrit

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
2,067,974 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Backend
Similar stack
Same company
Billy-Berclau
junior programmer 5 hours ago
$23k – $42k per year (gross) · In office · Full-Time · 2+ years exp · Singapore
JavaScript
PHP
SQL
C++
Databases
MySQL
Apply
$28k – $38k per year (gross) · In office · Full-Time · 2+ years exp · Singapore
JavaScript
SQL
C#
Apply
Web Developer 5 hours ago
$20k – $38k per year (gross) · In office · Full-Time · 1+ year exp · Singapore
JavaScript
PHP
SQL
C#
PHP
WordPress
WooCommerce
C#
.NET
Databases
MySQL
AI/ML
Claude
Qwen
DeepSeek
AI Agents
Gemini
LLM
RAG
Agentic Workflows
Frontend
Next.js
Bootstrap
React.js
JQuery
Mobile
React Native
DevOps
GCP
Azure DevOps
Azure
CI/CD
Git
AWS
Docker
Kubernetes
Cloudflare
Nginx
GitHub
GitLab
Apache HTTP Server
Design
Adobe Photoshop
Figma
Apply
$42k – $52k per year (gross) · In office · Full-Time · 3+ years exp · Singapore
JavaScript
Node JS
Databases
Db2
MS SQL
Frontend
React.js
DevOps
Rest API
GitLab CI
CI/CD
Cybersecurity
SonarQube
Fortify
Design
Figma
Apply
$93k – $204k per year · Hybrid · Full-Time · 5+ years exp · High School Diploma · New York · Hartford
Java
Java
Spring Boot
Spring MVC
Databases
Apache Kafka
DevOps
Rest API
GCP
Azure
Incident Management
Cybersecurity
HIPAA
Management
Agile
Apply
≈ $46k – $98k per year (Estimated) · In office · Sydney
TypeScript
C#
C#
.NET
AI/ML
Prompt Engineering
AI Agents
Semantic Kernel
RAG
OpenAI
LLM Guardrails
Multi-Agent Systems
Copilot Studio
DevOps
Azure
CI/CD
AWS
Apply
≈ $65k – $137k per year (Estimated) · In office · Sydney
TypeScript
C#
C#
.NET
AI/ML
Prompt Engineering
AI Agents
Semantic Kernel
RAG
OpenAI
LLM Guardrails
Multi-Agent Systems
Copilot Studio
DevOps
Azure
CI/CD
AWS
Apply
System Analyst 6 days ago
$32k – $44k per year · Hybrid · Full-Time · Riga
Python
JavaScript
SQL
C#
C#
.NET
Analytics
Power BI
Management
Agile
Apply
≈ $22k – $60k per year (Estimated) · Remote (Venezuela) · Caracas
Java
SQL
C#
Visual Basic
C#
.NET
Databases
MS SQL
Apply
≈ $14k – $39k per year (Estimated) · Hybrid · Bachelor's Degree · Novosibirsk
Python
JavaScript
Java
TypeScript
C#
Java
Spring Framework
C#
.NET
Frontend
Angular
DevOps
Git
Docker
Kubernetes
Apply
$98k – $112k per year · Hybrid · Freelance · 3+ years exp · Lambersart
DevOps
VMWare
Apply
$140k – $168k per year · Hybrid · Freelance · 5+ years exp · France
DevOps
TCP/IP
VLAN
Apply
$182k – $210k per year · Hybrid · Freelance · France
DevOps
Terraform
Ansible
Kubernetes
Linux
Apply
See all jobs
This is one of many
2,067,974 more open roles from verified company boards, updated every day.