Senior Backend Engineer — Payments & Fraud Platform

PAPAYA; Województwo mazowieckie; Hybrid; PLN 180,000 - 270,000; Full time

Benefits offered by this job

Luxmed Medical services

Monthly voucher

Multisport card

Happy Hours

Snacks and Breakfasts

Central Warsaw office

Hybrid work model

Job summary

Papaya is hiring an experienced Backend Developer to join the Payments & Fraud team in a hybrid role at the growing Warsaw office. You will design, build, and scale high-performance backend services powering payments and fraud operations for millions of users.

We expect 6+ years in server-side development, strong Node.js/TypeScript skills, and a passion for learning new technologies. The role offers a hybrid work model in Warsaw with a competitive Polish-market package.

Qualifications

• 6+ years of backend experience.
• Experience with cloud-based architectures.
• Proficiency in Node.js or another major backend language.
• Interest in AI-assisted development tools.
• Passion for learning and adopting new technologies.

Responsibilities

• Develop and maintain a high-scale backend platform serving millions of users.
• Design and implement end-to-end solutions that reduce time-to-market and improve system efficiency.
• Write high-quality, performant, and maintainable code following industry best practices.
• Experiment with new technologies, tools, and third-party frameworks to drive innovation.
• Mentor new team members and contribute to a culture of engineering excellence.

Skills

Backend development

System design

Cloud architectures

Mentoring

Tools

AWS

Kubernetes

Node.js

TypeScript

Redis

MySQL

Job description

Papaya is hiring an experienced Backend Developer to join the Payments & Fraud team in a hybrid role at the growing Warsaw office. You will design, build, and scale high-performance backend services powering payments and fraud operations for millions of users.

We expect 6+ years in server-side development, strong Node.js/TypeScript skills, and a passion for learning new technologies. The role offers a hybrid work model in Warsaw with a competitive Polish-market package.