Python Developer

BETBY; Barcelona; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Health insurance

Sick leave

Vacation and life events leaves

Learning and growth opportunities

Modern hardware

Job summary

Betby is building a complex, high-load microservice-based backend for risk management in sports betting. We value autonomy, ownership, and scalable engineering as we expand with a small, focused team.

Join our Risk-Management Product Group to develop back-office risk tools, integrate with Kafka and RabbitMQ, and contribute to architecture discussions. We offer modern hardware, international teams, and strong learning opportunities.

Qualifications

• Proven backend development experience with Python and asynchronous programming.
• Extensive microservice architecture experience (REST API, RPC).
• Strong knowledge of algorithms and data structures.
• Experience designing internal libraries / SDKs.
• Solid understanding of SOLID, DRY, KISS, YAGNI principles.
• Experience with stream processing and message queues.
• Experience with Kafka and RabbitMQ integration.

Responsibilities

• Develop and maintain high-load backend services using Python (asyncio).
• Design, support, and optimize microservice architecture components.
• Implement integrations with Kafka, RabbitMQ, and internal RPC services.
• Refactor and improve existing services for scalability and reliability.
• Write tests to ensure system stability.
• Collaborate with cross-functional teams and participate in code reviews.

Skills

Python

Asyncio

Microservice architecture

REST API / RPC

Algorithms & data structures

SOLID / DRY / KISS / YAGNI

SDKs / internal libraries

Stream processing

Tools

Kafka

RabbitMQ

MongoDB

Docker

Kubernetes

Prometheus

Grafana

ELK

Pydantic v2

Job description

About Betby

As a fast-growing, award-winning company, Betby powers the industry with our premium sportsbook, featuring world-class risk management and seamless omni-channel support, reaching millions of players across countless markets.

With offices in Latvia, Malta, Spain, Greece and Montenegro, we offer a vibrant work culture, relocation opportunities, and full support for remote talent across the globe. Join Betby and unlock endless opportunities for growth, success, and making a real impact in the world of iGaming!

Short Description

We are building a complex, high-load system based on a microservice architecture, where every component plays a critical role. This is not a legacy support project - it's about continuous development of new modules, performance optimization, and high-throughput processing.

You will join the Risk-Management Product Group, which builds and develops the product - risk management tools and the back office pages used by internal risk managers and external operator clients to manage sportsbook risk.

Our team is small, but always growing and focused (6-8 engineers), operating with high autonomy, deep ownership, and a shared passion for scalable engineering.

TECH STACK

• Python 3.13+ (asyncio, Pydantic v2)
• Kafka
• RabbitMQ
• MongoDB
• Docker
• Kubernetes
• Prometheus
• Grafana
• ELK

Responsibilities

• Develop and maintain high-load backend services using Python (asyncio)
• Design, support, and optimize microservice architecture components
• Participate in architectural discussions and technical decision-making
• Implement integrations with Kafka, RabbitMQ, and internal RPC services
• Refactor and improve existing services with focus on scalability, reliability, and performance
• Write functional and integration tests to ensure system stability
• Collaborate with developers, QA, analysts, and product teams, while contributing to code reviews and knowledge sharing

REQUIREMENTS

• Python 3.11, 5+ years of professional experience
• Strong hands‑on experience with asyncio and asynchronous programming (3+ years preferred)
• Experience in microservice architecture (REST API, RPC)
• Strong knowledge of algorithms and data structures
• Good understanding and practical application of SOLID, DRY, KISS, YAGNI principles
• Experience designing internal libraries / SDKs / shared components
• Pydantic (v2)
• Hands‑on experience with stream processing
• Solid understanding of RPC (designing RPC servers, request/response, retries, correlationId)
• Kafka (consumer groups, delivery guarantees, schema design, experience in defining optimal partitioning strategies)
• RabbitMQ (RPC, pub/sub, DLX, retries)
• MongoDB (indexes, configs, transactions)

NICE TO HAVE

• Experience in fintech, betting, trading domains
• Experience with Prometheus, Grafana, ELK, Docker, Kubernetes,GraphQL (Ariadne), ClickHouse
• CI/CD setup experience

WHAT WE OFFER

• Comprehensive health insurance with coverage for your well-being
• Paid sick leave up to 10 days without medical certificate
• 20 days of paid vacation plus additional leave for important life events
• Learning and growth opportunities with support for professional developmentLanguage learning support for multilingual collaboration
• Modern hardware provided for your work
• International team environment across multiple countries
• Corporate events and team activities
• Welfare support program for critical situations
• Gifts and support for major life milestones

WHY JOIN OUR DREAM TEAM?

Betbyterians is a passionate team dedicated to creating exceptional B2B betting products. United by trust, support, and fun, we aim to revolutionize online gaming, tackling challenges with agility, creativity, and teamwork. Driven by innovation and strong business practices, our achievements speak for themselves. Experience it first‑hand, join us and be part of something extraordinary. Welcome to Betby!