Senior Python Engineer, Integration

Fliff; España; On-site; EUR 90,000 - 120,000; Full time

Job summary

Fliff is seeking a Senior Python Engineer to join the Integration team. You will own backend features end-to-end, build scalable services in Python and Django, and drive integrations with KYC, geolocation, and payments.

You will work closely with product and engineering to scope new integrations, implement observability, and write tests to ensure reliability while supporting production systems and on-call rotations.

Qualifications

• 5+ years of development experience with Python and API/system integrations.
• Strong ability to design and implement scalable backend features.
• Experience integrating third-party APIs, webhooks, and idempotent flows.
• Familiarity with observability tools to monitor production integrations.
• Understanding of algorithms, data structures, and concurrent systems.

Responsibilities

• Take ownership of backend features from design to production support.
• Develop and maintain scalable Python/Django services.
• Build integrations with KYC, geolocation, payments and other partners.
• Collaborate with product and engineering teams to scope new integrations.
• Implement observability including monitoring, logging, and alerts.

Skills

Python

APIs & Integrations

Observability

Algorithms & DS

Concurrency

On-call readiness

Tools

Datadog

CloudWatch

Grafana

Job description

About The Role

We're looking for a Senior Python Engineer to join our Integration team, which owns a broad set of critical integrations across the product. The team is responsible for integrations with KYC providers, geolocation services, payment methods, and other external systems that are essential to product operation and user experience.

What You'll Do

• Take full ownership of backend features and improvements, from design through implementation, deployment, and production support
• Design, develop, and maintain scalable, high-performance backend services using Python and Django
• Build and maintain integrations with external systems, including KYC, geolocation, and payment partners, and other third-party services
• Work closely with product and engineering teams to scope and deliver new integrations
• Implement observability across integration flows, including monitoring, logging, and alerting
• Write unit and integration tests to ensure system reliability, prevent regressions, and improve overall test coverage and testing practices
• Support production issues and participate in on-call rotations

What We're Looking For

• At least 5+ years of development experience, with Python as the primary language and strong experience in API and system integrations
• Proven experience integrating third-party APIs, with deep understanding of webhooks, callbacks, idempotency, and failure handling. Payments and KYC integrations are strong plus
• Experience with observability tools to monitor and troubleshoot production integrations
• Strong fundamentals in algorithms, data structures and concurrency
• Experience in architecture design of highly loaded and scalable solutions
• Strong understanding of the full software development lifecycle, from requirements analysis to deployment and production monitoring
• Willingness to participate in on-call rotations

Nice To Have

• Experience in early-stage startups and fast-paced engineering environments
• Experience in writing automated tests, measuring test coverage, and defining test automation strategies
• Experience with observability tools such as Datadog, CloudWatch, Grafana
• Experience in sports/betting industries

Company Locations

We are a multinational company with our headquarters based in Philadelphia, and offices in New York, Austin, and Sofia, Bulgaria.

Wherever we are in the world, we pride ourselves on being a close-knit, focused team that is welcoming and friendly, and the work that we do is always interesting and rewarding. Wherever we are in the world, we pride ourselves on being a close-knit, focused team that is: Welcoming and Friendly We want to reflect the diversity of the cities we serve. By creating an inclusive culture where everyone can thrive, we'll make Fliff better for employees and customers alike. Lively and Creative We respect and value each other's ideas, experience and expertise. There is no such thing as a bad idea; only ideas that are executed and ideas that are discarded after consideration. Stimulating and Rewarding We know bright minds love a challenge, and we understand your desire to see your hard work pay off. We'll make sure your daily tasks align with your career ambitions as we grow together.

Equal Employment Opportunity Statement

Fliff is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.