Functional Programming

Strengthen your architecture with proven functional programming expertise.

Xebia helps organizations adopt and scale functional programming to build robust, maintainable, and high-performance software. Our consultants work closely with your teams to implement functional principles that simplify complexity, reduce bugs, and support parallel processing at scale.

By applying proven practices in languages like Scala, Kotlin, and Rust, we help you increase code quality, improve system predictability, and future-proof your architecture. The result is a development model that supports agility, resilience, and long-term innovation.

Our Expertise

What We Do

Legacy Modernization

Re-engineer legacy systems to improve performance, streamline operations, and integrate emerging technologies.

Architectural Advice

Refine your software architecture to improve scalability, reduce complexity, and support seamless integration of modern technologies.

Upskilling & Training

Learn to write clean, scalable, and maintainable code with functional programming in Kotlin and Scala. These hands-on courses teach core principles to help you build robust, modern applications.

Scala

Use Scala to create scalable, high-performance systems with strong functional foundations. We support teams in building reactive applications and managing complex data workflows with confidence.

Kotlin

Build modern, reliable applications with Kotlin. From Android to backend, we help you leverage Kotlin’s expressiveness and interoperability to accelerate development and reduce maintenance overhead.

Rust

Deliver secure and efficient software with Rust. We guide you in building fast, memory-safe systems that support everything from performance-critical tools to robust backend services.

Key Benefits

Simpler, More Predictable Code

Functional programming isolates side effects and avoids mutable state, making code easier to understand, test, and debug in complex systems.

Improved Concurrency and Performance

Immutable data and stateless functions make it easier to write safe, concurrent programs that scale across distributed systems.

Greater Reusability and Modularity

Functions are first-class citizens, allowing you to build applications from small, reusable components that are easy to compose and maintain.

Fewer Bugs in Production

Pure functions and strong typing reduce runtime errors and help catch issues early, improving software reliability and quality over time.

Our Work

Client Stories

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Streaming Platform Adds Required Age Verification for International Launch

See how a global entertainment leader collaborated with Xebia to implement verification services and meet compliance needs for an international launch.

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Accelerating Drug Discovery with Scalable, Cloud-Native Architecture

Xebia helped a global pharmaceutical leader modernize legacy systems and build a scalable, cloud-native platform, enabling faster drug discovery and secure, data-driven collaboration.

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Modernizing Core Banking Technology Infrastructure

Xebia partnered with a global bank to replace legacy systems with a modern, cloud-native core. The transformation improved scalability, reduced time-to-market, and laid the groundwork for continuous innovation.

Our Ecosystem

Partners

AWS Premier Partner with 750+ experts and 18 competencies, leading AI-powered modernization with GenAI, Agentic AI, and digital resilience.

Elite Consulting Partner and Europe’s first Authorized Training Partner with 100+ certified experts, including 8+ Databricks Champions.

Global GitHub Partner of the Year 2024–2025 and GitHub’s first verified partner in Europe.

Google Cloud Premier Partner since 2017, providing secure, cloud-native solutions in data, GenAI, and Agentic AI.

Trusted Microsoft Solutions Partner across Azure, Security, Infrastructure and Innovation, with 23 MVPs, 5 Regional Directors, and 1200+ engineers.

Our Ideas

Insights & Perspectives

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Six Tips for Onboarding Juniors into Scala

Set up your junior developers for success with actionable strategies to ease their transition into Scala. Learn how to reduce complexity, build confidence, and foster long-term growth.

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Why the Financial Industry Loves Kotlin

Kotlin is redefining how fintech teams build secure, high-performance systems. Explore its growing impact on the industry and why it's becoming a go-to language for modern finance.

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Generic Refinement Types in Scala 3

Explore generic refinement types in Scala 3 using opaque types and compile-time checks to boost type safety in numeric operations.

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Kotlin Gems: Features I Wish I Discovered Sooner

Explore lesser-known Kotlin features that boost productivity and code clarity. A practical guide for developers looking to write smarter, more elegant Kotlin.

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