Senior Fullstack Software Engineer

TL;DR

Senior Fullstack Software Engineer (C#/React): Working on performance-critical systems that process and aggregate millions of records in real time, directly enabling clients to make better, faster decisions. Focus on scalability and performance challenges across high-volume, real-time datasets.

Location: France/London. Hybrid work format.

Salary: €60,000 - €130,000 a year

Company

hirify.global is a fast-growing SaaS company redefining business planning and performance with their AI-powered platform.

What you will do

• Contribute to the design and optimization of our proprietary formula and query engine.
• Tackle scalability and performance challenges across high-volume, real-time datasets.
• Collaborate closely with frontend engineers and product managers to deliver impactful features.
• Build and maintain backend services using modern technologies like .NET Core, PostgreSQL, React, and GCP.
• Influence architecture decisions, test new ideas, and continuously improve performance and reliability.

Requirements

• Proven experience designing object oriented software with languages such as C#, Java, C++, Golang, Rust, Python or Ruby.
• Proven experience with JavaScript, CSS and JavaScript libraries or frameworks such as React, Vue.js or Angular.
• Great team spirit with a problem-solving attitude.
• A good dose of humility and the willingness to grow.
• A fluent level in English.

Culture & Benefits

• Competitive salary and equity.
• Best health insurance with Alan Blue entirely free for you and your family.
• Trust and flexible working hours.
• Brand new offices in the heart of Paris, London, New-York and Toronto.