staff backend engineer

Our mission is to enable everyone to build wealthWe reinvent how trading and investing work by creating exceptional products people love.That takes high standards, high velocity and engineers who own what they ship.Today, we serve over 6 million clients, with more than €38 billion in assets under management. At that scale, performance, reliability and data...

Our mission is to enable everyone to build wealth. We reinvent how trading and investing work by creating exceptional products people love. That takes high standards, high velocity and engineers who own what they ship. Today, we serve over 6 million clients, with more than €38 billion in assets under management. At that scale, performance, reliability and...

ABOUT THE ROLELeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers.We are looking...

ABOUT THE ROLE LeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers. We are looking...

About CoW DAO CoW DAO is on a mission to protect Ethereum users from MEV and optimize trade execution across DeFi. We achieve this through the CoW Protocol, CoW Swap (a leading intent-based DEX aggregator), and the innovative MEV Blocker, which together help secure, aggregate, and route trades for optimal outcomes. We also fund values-aligned projects via...

Cloudinary is the media experience platform trusted by millions of developers and thousands of companies — from fast-growing startups to the world's largest brands — to power the images and video behind their digital experiences.Something fundamental is changing about who uses that platform. Increasingly, the "developer" calling our APIs isn't a person...

ABOUT THE ROLE LeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers. We are...

ABOUT THE ROLE LeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers. We are looking...

Shape the future of trust in the age of AIAt Oscilar, we're building the most advanced AI Risk Decisioning™ Platform. Banks, fintechs, and digitally native organizations rely on us to manage their fraud, credit, and compliance risk with the power of AI. If you're passionate about solving complex problems and making the internet safer for everyone, this is...

AboutFreshaFresha is the leading marketplace platform for beauty & wellness trusted by millions of consumers and businesses worldwide.Fresha is used by 120,000+ businesses and 450,000+ stylists and professionals worldwide, processing over 1 billion appointments to date.The company is headquartered in London, United Kingdom, with 12 global offices located...

Assured is on a mission to modernize insurance. Claims processing (i.e. should we pay this claim?), while often overlooked, is the foundation of the entire industry. It’s currently highly manual, involving phone calls, faxes, and gut instinct, costing tens of billions of dollars a year. We can do better.At Assured, we provide large insurers with the...

Trading 212 Ltd. is seeking a Staff Backend Engineer to shape technical direction across teams, tackling high-consequence backend problems that span services and product domains.You will stay hands-on, mentor senior engineers and collaborate with product leaders on sequencing and long-term technical investments. A focus on reliability, data integrity and...

OLX is seeking an AI-native Staff Backend Engineer to scale our platforms from Poland and beyond. You will architect AI agent context pipelines, define task specifications, guide code reviews, and drive migration from a legacy monolith to microservices, ensuring reliable, testable outcomes.Fluent in Golang, Java/Kotlin and PHP, with deep distributed-systems...

LeoVegas Group is building a world-class Sportsbook platform and operates in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical. We are seeking a highly experienced Staff Backend Engineer to lead design, development and evolution of distributed systems while staying hands-on and mentoring teams.This role...

Join HelloFresh in Warsaw as part of HelloTech, our global technology organisation of 1000+ people building the digital products behind our end-to-end food experience from meal kits and ready-to-eat meals to specialty offerings like pet food and premium meat & seafood. Our subscription-based, direct-to-consumer model runs on technology at every step:...

About The Role LeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high‑volume, real‑time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers. What...

Kontakt.io is seeking a senior backend engineer to own data integrations and real-time processing in a multi-tenant SaaS environment. You will build and scale Java/Spring Boot services with Kafka Streams, ensuring latency and correctness in hospital-focused workflows.Collaborate with product and data teams, drive architectural decisions, and strengthen...

Affirm, Inc. is seeking a Staff Software Engineer, Backend (Identity International) to set technical strategy and own critical backend systems, with focus on reliability and scale from Poland.You will collaborate across product, design, and analytics, and help-expand Identity services globally while maintaining compliance and security. This remote role...

HelloFresh in Warsaw is hiring a Staff Software Engineer to lead architecture for AI-powered experiences across the Shopping AI & Search squad. You’ll integrate LLM-driven capabilities into production, balancing latency and cost while guiding cross-functional teams.You will mentor engineers, define best practices for observability and reliability, and...

GitLab, the intelligent orchestration platform for DevSecOps, is seeking a Staff Backend Engineer to provide technical leadership across teams. You’ll drive modular architecture, modernization of monoliths, and high-scale backend initiatives while maintaining security, reliability, and operability.You’ll mentor engineers, shape platform roadmaps with...