Senior Python Developer – Fraud Detection & Data Analytics

Checkpayee; Berlin; Ibrido; EUR 90.000 - 120.000; Tempo pieno

Vantaggi offerti da questo lavoro

Professional development budget

Conference support

Remote-first culture

Descrizione del lavoro

CheckPayee, a European VoP provider, is hiring a Senior Python Developer to strengthen fraud detection and payments infrastructure. You’ll build secure APIs, process large-scale transaction data, and optimize performance for real-time decisions.

You’ll collaborate with product, engineering, and compliance teams across a fast-moving fintech environment. Expertise in Django, DRF, PostgreSQL, Redis, Docker, and AWS is highly valued.

Competenze

• 5+ years of Python backend development experience.
• Deep knowledge of Django and REST API architecture.
• Strong experience with relational databases and caching (PostgreSQL, Redis).
• Familiarity with Docker, CI/CD pipelines, and AWS.
• Background in fintech or regulated industries.
• Experience with real-time data pipelines or fraud modeling.
• Knowledge of SEPA and European payment infrastructure.
• English proficiency for reading documentation and team communication.

Mansioni

• Design and build REST APIs for fraud detection and payment verification.
• Process and analyze financial transaction data to detect anomalies.
• Optimize backend performance for real-time decision-making.
• Collaborate with product, engineering, and compliance on architecture and roadmap.
• Own feature development from idea to production.

Conoscenze

Python

Django

REST API

PostgreSQL

Redis

Docker

AWS

CI/CD

Pandas

NumPy

scikit-learn

Fraud detection

English

API design

Strumenti

PostgreSQL

Redis

Docker

AWS

Descrizione del lavoro

At CheckPayee, we’re building the infrastructure of trust for European payments. Our real-time API verifies payees before payments are processed — protecting users and reducing APP fraud. As a Senior Python Developer, you’ll work on fraud detection logic, secure APIs, and large-scale transaction analytics that power our core platform.

• Design and build REST APIs: For fraud detection and payment verification
• Process and analyze data: Financial transaction data to detect anomalies and patterns
• Optimize performance: Profile backend performance for real-time decision-making
• Collaborate cross-functionally: Work with product, engineering, and compliance teams on architecture and roadmap
• Own feature development: Develop fraud-related features from idea to production
• Frameworks: Django, DRF, FastAPI (optional)
• Data & ML: pandas, NumPy, scikit-learn
• 5+ years of Python backend development experience
• Deep knowledge of Django and REST API architecture
• Strong experience with relational databases and caching (PostgreSQL, Redis)
• Familiarity with fraud detection systems or financial risk analytics
• Solid understanding of system design and secure coding principles
• English proficiency for reading documentation and team communication
• Familiarity with Docker, CI/CD pipelines, and AWS
• Background in fintech or regulated industries
• Experience with real-time data pipelines or fraud modeling
• Knowledge of SEPA and European payment infrastructure
• We speak English, Ukrainian, and Russian
• We’re fast, transparent, and support each other
• We value smart architecture and clean code
• You’ll be part of a fraud-fighting, impact-driven backend team

CheckPayee is a European Verification of Payee (VoP) provider helping banks, PSPs, and fintechs prevent fraud and comply with SEPA regulations. We’re part of a German IT group with 10+ years of experience in fintech and medtech. We build systems that are secure, scalable, and fast — and we believe in engineering with purpose.

• Intro Call: Initial discussion about your experience and our needs
• Tech Interview: Architecture and fraud detection logic discussion
• Coding Task: Practical assessment of your Python skills
• Team Call: Meet with the engineering team
• Offer: Complete process within 10-14 days
• 5+ years of backend development experience with Python
• Proficiency with Django and Django REST Framework
• Experience with PostgreSQL and Redis
• Understanding of OOP, system architecture, and core design patterns
• Experience developing and maintaining REST APIs
• Background in fraud detection, transaction analytics, or risk scoring
• Confident reading of English technical documentation
• Remote-first culture with flexible hours
• Opportunity to fight financial fraud at scale
• Work with experienced, international team
• Modern stack: Python 3.11+, Django, ClickHouse, Docker
• Professional development budget and conference support