Founding Software Engineer Python React AI

Client Server; Madrid; Híbrido; EUR 99.000 - 121.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Significant Bonus

Descripción de la vacante

Client Server in Madrid is seeking a Founding Software Engineer to design and develop new features across the full stack, with emphasis on Python and React, in a hands-on role for a growing Private Equity-backed firm.

You will work closely with senior stakeholders, drive AI adoption across projects, and shape the technical foundation while delivering impactful solutions. This is a full-time hybrid position with occasional remote flexibility.

Formación

• Backend skills with Python, Java, C#, or C++.
• Frontend skills with React and JavaScript/TypeScript.
• Strong knowledge of messaging technologies such as Kafka.
• Advocate of using AI tools to improve processes.
• Good knowledge of databases and data management.
• Fluent English language; Spanish in addition desirable.

Responsabilidades

• Architect, design and develop new features and enhancements across the full stack.
• Collaborate with senior stakeholders on complex projects, including AI integration.
• Own the end-to-end software development lifecycle and ensure high quality delivery.

Conocimientos

Python

Java

C#

C++

React

JavaScript

TypeScript

Kafka

AI tools

Databases

English

Spanish

Descripción del empleo

Founding Software Engineer / Developer (Python React Full Stack) Madrid onsite to €110,000

Are you a technologist with a range of skills across the full stack?

You could be progressing your career in an impactful, hands-on Founding Software Engineer role for a successful and growing Private Equity firm in Madrid.

As a Founding Software Engineer you will take ownership of architecting, designing and developing new features and enhancements, as well as client bespoke applications. You'll be working across the full software development lifecycle using a range of technology with a focus on Python and React, picking up new things on the job.

You’ll be hands-on with technology and will work closely with senior stakeholders on complex and interesting projects, including driving the use of AI within the company.

Location:

You’ll join a small team in Madrid on a fulltime basis (in time with flexibility to work from home once a week).

About you:

• You have strong backend skills with Python, Java, C# or C++ - happy to use Python going forward
• You also have frontend skills with React and other technologies including JavaScript / TypeScript
• You have a strong knowledge of messaging technologies such as Kafka
• You're an advocate of using AI tools to improve processes e.g. Claude, Cursor
• You have a good knowledge of databases and data management
• You enjoy learning and picking up new technologies
• You have strong commercial acumen and understand the business impact of what you do
• You have fluent English language skills, Spanish also desirable

What's in it for you:

As a Founding Software Engineer you will earn a competitive package:

• Salary to €110,000
• Significant Bonus
• Impactful role with excellent career growth