Role Overview

We are seeking a Senior Backend Developer with deep expertise in FastAPI and modern backend architecture to join our high-impact engineering team.
 You will design and implement highly scalable APIs, optimize system performance, and ensure secure integrations with financial services and third-party systems. This role demands both hands-on technical leadership and a strategic systems mindset.

This is a key role in our growing fintech platform — where quality, reliability, and precision truly matter.

Key Responsibilities

●     Design, develop, and maintain scalable microservices using FastAPI and Python 3.10+.

●     Implement and integrate authentication and authorization flows using Keycloak (OpenID Connect, OAuth2).

●     Develop event-driven systems leveraging Apache Kafka as the messaging backbone.

●     Optimize APIs for high performance and reliability in financial transaction environments.

●     Design and maintain CI/CD pipelines using Docker, Kubernetes, and modern DevOps tools.

●     Collaborate closely with product managers, frontend engineers, and data teams to deliver seamless fintech experiences.

●     Ensure security, observability, and fault tolerance across all backend services.

●     Mentor junior developers and contribute to engineering best practices.

Must-Have Qualifications

●     5+ years of professional backend development experience.

●     Strong proficiency in Python and FastAPI framework.

●     Solid understanding of microservices architecture, RESTful APIs, and asynchronous programming (asyncio).

●     Proven experience with Keycloak or other IAM solutions.

●     Experience with Kafka, Redis, and PostgreSQL in production-grade systems.

●     Hands-on experience in containerization (Docker) and orchestration (Kubernetes).

●     Familiarity with CI/CD tools (GitLab CI, Jenkins, or GitHub Actions).

●     Strong understanding of software security, monitoring, and API scalability.

●     Excellent problem-solving and debugging skills.

●     Strong communication and collaboration mindset.

Good to Have

●     Experience in Fintech, Banking, or Payment Systems.

●     Familiarity with DDD, CQRS, or Hexagonal Architecture.

●     Experience with async message-driven architectures.

●     Knowledge of Cloud Platforms (AWS, GCP, or Azure).

●     Familiarity with Prometheus / Grafana for observability.

●     Contributions to open-source projects or tech communities.

What We Offer

●     Opportunity to shape the future of digital finance in Iran.

●     Dynamic, mission-driven environment backed by Charisma Holding.

●     Competitive compensation and benefits package.

●     Continuous learning, professional growth, and collaboration with top-tier engineers.