Senior Back-End Engineer; Python

Job Information

Location:

Geneva, Switzerland (Office)

Contract Type:
Full-time, Permanent contract

Posted: 03.06.2026

Job Reference:

Listing Type:
Basic

EU Work Permit

Required:

No

ZYTLYN Technologies empowers companies across the $11 trillion travel industry to shape the future with predictive AI solutions. We work with some of the largest travel brands, focusing on airlines, airports, travel agencies, destinations, tourism boards, hotels, car rentals, travel retailers, and luxury brands.

• Own the design, development, and maintenance of scalable backend APIs and related infrastructure using FastAPI, Flask, and Postgres.
• Design and optimise backend architecture on AWS, ensuring high performance, reliability, and security.
• Champion CI/CD best practices and automated testing pipelines with Git Lab CI/CD to ensure high-quality, maintainable code.
• Collaborate closely with product managers, frontend engineers, and data teams to deliver robust backend solutions that power analytics, product features, and decision‑making.
• Mentor and support fellow engineers in building scalable, maintainable, and well‑tested systems.
• Continuously influence and improve the team’s engineering practices, tools, and workflow.

• 5+ years of experience designing and building backend systems, APIs, or services.
• Hands‑on experience with Python frameworks (FastAPI, Flask) and relational databases (Postgres).
• Proven ability to deploy and maintain applications in AWS environments.
• Strong experience with CI/CD pipelines, automated testing, and version control (Git Lab/Git workflows).
• Experience with Docker and Kubernetes for containerised application deployment.
• Works collaboratively and values team success over individual credit.
• Thrives in cross‑functional teams and enjoys helping others succeed.
• Highly organised, self‑motivated, and able to work in a fast‑moving environment.
• Strong written and verbal communication skills.

• Experience with frontend frameworks, particularly Next.js.
• Knowledge of MLOps practices and tools.
• Experience with embeddings, vector databases, hybrid search, chunking, reranking, tool‑calling, and source‑grounded LLM answers.
• Background in data engineering, including building or interacting with data pipelines or analytics systems.
• Knowledge of Infrastructure as Code tools (Terraform).
• Exposure to monitoring, observability, and performance optimisation for backend services.
• Passion for self‑learning and personal growth, continuously improving skills and keeping up with new technologies.

Join a team of exceptional talent — At ZYTLYN, we hire thoughtfully and selectively, bringing together a small, focused team of high performers. You’ll collaborate with driven colleagues who value efficiency, ownership, and impact. Competitive salary adjusted for experience and market benchmarks.