Senior Python Developer – Fraud Detection & Data Analytics

Checkpayee; United States; Remote; USD 72,000 - 94,000; Full time

Benefits offered by this job

Professional development budget

Conference support

International team

Job summary

Checkpayee in Berlin offers a remote-first backend role focused on fraud detection and payment verification. You will design REST APIs, process transaction data, and improve backend performance to enable real-time risk decisions in a collaborative engineering environment.

The role requires 5+ years of Python experience with Django/DRF, PostgreSQL, and Redis, plus familiarity with secure coding and English communication. Nice-to-have: FastAPI, Docker, CI/CD, AWS.

Qualifications

• Five years of Python backend development experience.
• Strong knowledge of Django and REST API design (Django REST Framework).
• Experience with PostgreSQL and Redis.
• Familiarity with fraud detection or financial risk analytics.
• Understanding of system design and secure coding practices.
• Ability to read technical documentation and communicate in English.

Responsibilities

• Design and implement REST APIs for fraud detection and payment verification.
• Process transaction data to identify unusual patterns and anomalies.
• Profile and improve backend performance for timely decisions.
• Build fraud-related features from concept to production delivery.
• Collaborate with product, engineering, and compliance on architecture and direction.

Skills

Python backend

Django & DRF

PostgreSQL

Redis

Fraud analytics

System design

Secure coding

English communication

Tools

Docker

FastAPI

CI/CD

AWS

Pandas/NumPy

ClickHouse

Job description

Role overview

Develop backend capabilities for fraud detection and payment verification, combining secure APIs with analysis of financial transaction data. You’ll take features from design through production and help improve the speed and quality of real-time risk decisions in a collaborative engineering environment.

Responsibilities

• Design and implement REST APIs for fraud detection and payment verification.
• Process transaction data to identify unusual patterns and potential anomalies.
• Profile and improve backend performance for timely decision-making.
• Build fraud-related features from initial concept through production delivery.
• Work with product, engineering, and compliance colleagues on architecture and technical direction.

Requirements

• At least five years of Python backend development experience.
• Strong knowledge of Django and REST API design, including Django REST Framework.
• Experience with relational databases and caching, particularly PostgreSQL and Redis.
• Familiarity with fraud detection or financial risk analytics.
• Understanding of system design and secure coding practices.
• Ability to read technical documentation and communicate in English.

Nice to have

Experience with FastAPI or asynchronous Python, Docker, CI/CD, and AWS; work in fintech or regulated industries; real-time data pipelines or fraud modeling; or familiarity with SEPA and European payment infrastructure. Experience with pandas, NumPy, scikit-learn, or ClickHouse may also be useful.

Benefits and work setup

• Full-time, remote-first role with flexible hours.
• The listed location is Berlin, Germany, and the salary range is €65,000–€85,000.
• Benefits include a professional development budget and conference support, with an international and collaborative team.