Appodeal

is a dynamic US-based product company with a truly global presence.

We have offices in

Warsaw, Barcelona and Parkland (FL),

along with remote team members located around the world.

Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.

Why Appodeal?

At Appodeal, we’re more than just a company—we’re a team united by a common mission: Help people discover and grow their talents through products that enable successful mobile app businesses.

We take pride in our cutting-edge product and our internationally dispersed team of talented professionals.

Here’s what we value, and what we hope you do too:

Continuous Learning and Growth:

We are passionate about learning, growing personally, and building rewarding careers.

Making an Impact:

We are committed to building a history-defining company that leaves a lasting impact on the mobile app industry.

Solving Exciting Challenges:

We tackle complex problems every day, supported by a team of world-class professionals and mentors.

Enjoying the Journey:

We believe in having fun while working toward our goals.

About Appodeal Appodeal is a dynamic US-based product company with a truly global presence.

We have offices in Warsaw, Barcelona, and Parkland (FL), along with remote team members located around the world.

Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.

Why Appodeal? At Appodeal, we’re more than just a company—we’re a team united by a common mission: Help people discover and grow their talents through products that enable successful mobile app businesses.

We take pride in our cutting-edge product and our internationally distributed team of talented professionals.

Here’s what we value:

Continuous Learning and Growth

– We invest in development and long-term careers

Making an Impact

– We are building a history-defining company in the mobile industry





Solving Exciting Challenges

– Complex, large-scale problems are part of our daily work

Enjoying the Journey

– We believe great results come with a positive environment

About the Role We are looking for a

Senior Rust Engineer

to join our Barcelona team and contribute to building high-performance, real-time systems powering our ML-driven AdTech platform ( Mobile Growth Platform. )

In this role, you will work on

core backend infrastructure and ML platform components , focusing on

low-latency, high-load services

that process large-scale traffic in real time.

You will play a key role in developing and optimizing systems such as

real-time applications, feature stores, user identity services, and custom inference layers , ensuring scalability, reliability, and performance.

Responsibilities

Contribute to the development of

real-time applications and ML platform components

Build and maintain

high-load, low-latency backend services

Work on in-house solutions including:

Feature stores

User identity services

Custom inference layer

ML platform infrastructure

Optimize system performance across

on-premise Docker & Kubernetes environments

Design and implement solutions for

traffic scaling and system reliability

Collaborate with ML, data, and engineering teams to support production ML systems

Continuously improve system architecture, observability, and efficiency

Tech Stack

Languages:

Rust, Python

Data & Streaming:

Kafka, SQL, Redis, ScyllaDB, Delta Lake, Databricks

Infrastructure:

Docker, Kubernetes (on-premise)

Tools:





GitHub

Requirements

5+ years of experience in

software engineering

Strong proficiency in

Rust or proficiency in

C/C++/Zig with willingness to transition to Rust

Experience designing and building

high-load, performance-critical systems

Solid understanding of

system design, concurrency, and performance optimization

Basic knowledge of

machine learning workflows and tools

Nice to Have

System programming experience ( C, C++, Zig )

Experience in

ML engineering / MLOps

Strong

Python

skills

Familiarity with

AdTech standards (OpenRTB, MRAID, VAST)

Experience with

WASM / WASI

Background in

distributed systems and real-time processing

Location:

Barcelona, Spain (office attendance 4 days per week)

What We’re Looking For

Autonomous and self-driven engineer with strong ownership mindset

Passion for

engineering excellence, performance, and scalability

Interest in

ML/AI systems and infrastructure

Ability to work independently and make informed decisions

Strong collaboration and communication skills

Why Join Us:

Opportunity to work on cutting-edge projects with a integral impact in the mobile app industry.

A collaborative and inclusive work culture that values innovation and continuous learning.

Competitive salary, flexible work arrangements, and a comprehensive benefits package.

Professional development opportunities and career growth prospects within a fast-growing company.

We appreciate teamwork, critical thinking, independent decision-making, and standing up for oneʼs viewpoint. We are looking for talented engineers who are willing to grow, improve and share our values!

With an outstanding product and a mission that excites and inspires, Appodeal offers a unique opportunity to make an impact while being part of an amazing team.

Join us

and help shape the future of mobile app success!

#J-18808-Ljbffr

📌 Senior Rust Engineer (Madrid)
🏢 Appodeal
📍 Madrid