King operates games at a massive scale, serving hundreds of millions of players around the world. Behind every player experience is a large ecosystem of services, data platforms, forecasting systems, and internal tools that help our teams make better decisions, move faster, and deliver exceptional experiences.

Craft Technology & Development

We are looking for a Developer (Python) to help design, build, and operate backend services, internal applications, and data-driven platforms that support critical business and product decisions across King. You will work on systems that process large volumes of data, run forecasting and analytical workloads, and provide reliable APIs and services consumed by teams across the company. You will collaborate closely with software engineers, data scientists, analysts, product managers, and business stakeholders to build scalable solutions that transform complex data into actionable insights.

This role combines backend engineering, distributed systems, cloud-native development, and data-intensive applications. While the primary focus of the role is backend engineering, you will also contribute to user-facing internal applications, helping deliver end-to-end solutions that enable teams across King to work more effectively. An important part of the role will be integrating our platforms and tools with the broader King and Microsoft ecosystem, enabling seamless collaboration, authentication, data exchange, and workflow automation across multiple services and platforms.

King is a place where we build collaboratively and value diverse perspectives. We encourage experimentation, continuous learning, and ownership. You will have the opportunity to contribute to impactful projects, solve challenging technical problems, and work alongside experienced engineers in a supportive environment.

Your Role Within the Kingdom You will enjoy a creative, challenging, and collaborative environment where your ideas will be valued as much as your technical expertise.

Responsibilities

Design, develop, and maintain backend services and APIs using Python





Build scalable and reliable applications that support forecasting, analytics, and decision-making processes across the business

Develop distributed processing pipelines and asynchronous workloads

Design and optimize relational OLTP databases, data models, and query performance

Build and maintain data processing, analytical, and forecasting workflows

Design, develop, and maintain internal web applications when required

Build intuitive interfaces and workflows that enable technical and non-technical users to interact with backend systems and business tools

Integrate services with the King and Microsoft ecosystems, including identity, collaboration, communication, and productivity platforms

Develop and maintain APIs and connectors that enable interoperability between internal and external systems

Deploy, monitor, and operate containerized applications in cloud-native environments

Contribute to technical designs, architectural discussions, and engineering best practices

Improve system reliability, observability, performance, and operational excellence

Deliver high-quality, well-tested, maintainable code

Participate in code reviews and knowledge-sharing initiatives across teams

Support CI/CD pipelines and automation practices throughout the software development lifecycle

Skills to Create Thrills

Strong Python development experience in production environments

Experience building backend services and APIs

Understanding of modern web application development and the ability to contribute across the stack when needed

Solid understanding of asynchronous programming, concurrency, and distributed systems

Experience designing and optimizing relational databases

Experience building data-intensive applications and processing large datasets





Experience with background processing, job orchestration, or distributed workloads

Experience deploying and operating applications in containerized and cloud-native environments

Familiarity with CI/CD practices and automation pipelinesStrong testing, debugging, and problem-solving skills

Strong communication and collaboration skills

Ability to work effectively in cross-functional teams

High sense of code quality and the desire to build and maintain robust, reliable software

Curiosity and adaptability when learning new technologies and domains

Technologies We Use

Python

FastAPI

Django

HTMX

TypeScript

PostgreSQL

Pandas

NumPy

SciPy

Celery

Docker

Kubernetes

Drone CI

Bonus Points

Experience building forecasting, optimization, simulation, or analytics platforms

Experience with Google Cloud Platform or other major cloud providers

Experience integrating with Microsoft technologies and services such as Microsoft Entra ID (Azure AD), Microsoft Graph, Teams, SharePoint, or related enterprise platforms

Experience building internal developer platforms, business applications, or workflow automation solutions

Experience working with large-scale data processing systems

Familiarity with observability and monitoring tools such as Grafana or Sentry

Experience improving application performance and scalability in production environments

About King With a mission of Making the World Playful, King is a leading interactive entertainment company for the mobile world with more than 20 years of history of delivering some of the world’s most iconic games in the mobile gaming industry, including the world-famous Candy Crush franchise, as well as other mobile titles such as Farm Heroes Saga. King games are played by more than 200 million monthly active users.

King, part of Microsoft (NASDAQ: MSFT), has Kingsters in Stockholm, Malmö, London, Barcelona, Berlin, Dublin, San Francisco, New York, Los Angeles and Malta. More information can be found at King.com or by following us on LinkedIn and @lifeatking on Instagram.

📌 Python Developer (Madrid)
🏢 King
📍 Madrid