Senior Core Platform Engineer – Remote, Profit Sharing

ABC Arbitrage SA; Paris; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Profit-sharing

Job summary

ABC arbitrage is seeking an experienced Software Engineer to join the Core Platform team in Paris. You will design and build core services in C#/.NET and maintain Python libraries, working across distributed systems and data infrastructure.

We value developers who care about API design, developer experience and production-grade software, with 5–8 years of hands-on experience. The role offers hybrid work (up to 50% remote) and a competitive package in Paris.

Qualifications

• 5 to 8 years of professional software development experience.
• Strong fundamentals and ability to learn beyond specific language or framework.
• Experience building backend or systems software in modern languages (C#, C++, Rust, Go or Java)

Responsibilities

• Design and build core services, frameworks and libraries in C#/.NET.
• Design and maintain Python libraries, SDKs and integration layers.
• Work on distributed computing, data infrastructure, messaging and internal APIs.
• Build tools and abstractions to hide infrastructure complexity and improve productivity.
• Design APIs and interfaces for C# and Python.
• Investigate production issues and design sustainable solutions.
• Take ownership from architecture through production implementation.

Skills

C#

Python

Distributed systems

API design

Cloud / AWS

Tools

AWS

Kubernetes

GitLab

Job description

ABC arbitrage is seeking an experienced Software Engineer to join the Core Platform team in Paris. You will design and build core services in C#/.NET and maintain Python libraries, working across distributed systems and data infrastructure.

We value developers who care about API design, developer experience and production-grade software, with 5–8 years of hands-on experience. The role offers hybrid work (up to 50% remote) and a competitive package in Paris.