Lead Python Engineer, Integration team

Fliff Inc; Barcelona; On-site; EUR 70,000 - 100,000; Full time

Job summary

Fliff Inc is seeking a senior Python engineer to lead three backend developers working on payments, identity verification (KYC), location services, and other external integrations. You’ll guide technical delivery and mentor the team while remaining hands-on.

Our stack includes Python, Django, PostgreSQL, Redis, Kafka, AWS. You’ll design integrations, coordinate with product and partners, and drive reliable production systems.

Qualifications

• 5+ years of software development experience with Python as primary language.
• Production experience with payments or similar financial systems.
• Experience launching and supporting an integration and verifying transactions/records recovery.
• Experience building reliable API and event-driven integrations.
• Experience designing scalable services, databases, tests, and monitoring.
• Examples of guiding a project, mentoring engineers, or coordinating delivery.

Responsibilities

• Design and build integrations, owning delivery from requirements and technical decisions through deployment, launch, and ongoing improvement.
• Guide the team’s technical direction and delivery through clear responsibilities, design and code reviews, mentoring, shared knowledge, and constructive performance feedback.
• Work with product, engineering, and external partners to agree priorities, communicate trade-offs, and deliver the intended results.
• Improve existing integrations through testing, monitoring, logging, alerting, and documentation.
• Introduce practical engineering improvements and help the wider team adopt them.
• Investigate production issues and participate in the team’s on-call rotation.

Skills

Python

Backend engineering

Leadership/mentoring

API design

On-call readiness

Tools

Django

PostgreSQL

Redis

Kafka

AWS

Job description

We’re looking for a senior Python engineer ready to step into leadership, or an experienced technical lead who enjoys staying hands‑on.

You’ll lead three backend developers working on payments, identity verification (KYC), location services, and other external integrations. You’ll help the team deliver new capabilities, evolve existing integrations, and keep them reliable in production.

A formal lead title isn’t required. Experience guiding projects, mentoring colleagues, or coordinating technical delivery is a strong foundation for this role.

Our stack: Python, Django, PostgreSQL, Redis, Kafka, AWS.

Responsibilities

• Design and build integrations, owning delivery from requirements and technical decisions through deployment, launch, and ongoing improvement
• Guide the team’s technical direction and delivery through clear responsibilities, design and code reviews, mentoring, shared knowledge, and constructive performance feedback
• Work with product, engineering, and external partners to agree priorities, communicate trade-offs, and deliver the intended results
• Improve existing integrations through testing, monitoring, logging, alerting, and documentation
• Introduce practical engineering improvements and help the wider team adopt them
• Investigate production issues and participate in the team’s on‑call rotation

Requirements

• 5+ years of software development experience, with Python as your primary language and strong backend engineering skills
• Hands‑on production experience with payments or similar financial systems, such as wallets, ledgers, transfers, or settlement, where duplicate or missing operations can affect money or financial records
• Experience personally launching and supporting an integration, resolving production problems, and verifying that affected transactions and records were recovered correctly
• Experience building reliable API and event‑driven integrations, including handling duplicate notifications, concurrent requests, delayed responses, and recovery from failures
• Experience designing scalable services, working with databases, writing unit and integration tests, and using monitoring tools to investigate production behavior
• Examples of guiding a project, mentoring engineers, or coordinating delivery, alongside clear communication and an interest in developing your leadership skills

Great to have

• Experience with KYC providers and identity‑verification workflows
• Experience with both incoming and outgoing payments and reconciliation
• Familiarity with Datadog, CloudWatch, Grafana, or similar tools
• Experience in startups, sports, betting, or gaming products

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.

IMPORTANT NOTICE

The privacy and security of applicant information is paramount and we take fraud attempts very seriously. Please note that Fliff will never ask for payment or personal financial information during the application process. All of our legitimate job opportunities can be found on our official career site https://www.getfliff.com/careers. Please be cautious of communications and links that come from non-company email addresses (@getfliff.com), social media messaging platforms or unsolicited phone calls.