Backend Developer – Python & FastAPI Engineer

Winzons; India; On-site; INR 1,200,000 - 1,600,000; Full time

Job summary

Astuto is seeking a Backend Developer to build and scale high-performance APIs using Python and FastAPI. You will own features end-to-end, collaborate with senior engineers, and contribute to a SaaS platform serving multi-tenant cloud spend analytics across AWS, GCP, and Azure.

The role emphasizes hands-on ownership, clean code, and strong collaboration within a small engineering team.

Qualifications

• Proficient in Python 3.9+ and FastAPI with hands-on experience.
• Strong REST API design, authentication (JWT/OAuth) and API versioning.
• Experience with PostgreSQL, schema design, migrations, and query optimization.
• Familiarity with Docker-based deployments and CI/CD pipelines.
• Kubernetes exposure including troubleshooting pod/service issues.
• Knowledge of software design patterns and SOLID principles; testable code.
• Experience with cloud platforms (AWS, GCP, or Azure).
• Experience in startup/high-growth environments.

Responsibilities

• Design, develop, and maintain RESTful APIs and microservices using Python and FastAPI.
• Write clean, production-grade code with strong error handling and logging.
• Work with PostgreSQL and ClickHouse to support multi-tenant data queries.
• Participate in code reviews, architecture discussions, and sprint planning.
• Collaborate with DevOps on deployment, monitoring, and incident response.
• Own features end-to-end from design to deployment, including documentation.
• Ensure high availability, reliability, and security of backend services in a SaaS environment.

Skills

Python

FastAPI

REST API design

JWT/OAuth

PostgreSQL

Docker

Kubernetes

CI/CD

Testing

Cloud platforms

Tools

Git workflows

ClickHouse

PostgreSQL tooling

Job description

Company Name: Astuto

Job Role: Backend Developer

Work Type: Full-Time

Experience: 2-4 Years

Location: Bengaluru

Industry: AI / Cloud FinOps / SaaS

About the Role :

We are looking for a Backend Developer who is comfortable building and scaling high-performance APIs with Python and FastAPI. Youll work on core platform services that power OneLens building the APIs that help companies track and optimise millions in cloud and AI spend across AWS, GCP, Azure, and beyond.

This is a hands-on individual-contributor role where you will own features end-to-end and collaborate closely with senior engineers, data engineers, and frontend developers. Youll work within a small, focused engineering team where your contributions are visible from day one.

Key Responsibilities :

• Design, develop, and maintain RESTful APIs and microservices using Python and FastAPI.
• Write clean, well-tested, production-grade code with solid error handling and logging.
• Work with relational databases (PostgreSQL) and analytical stores (ClickHouse) to support multi-tenant data queries.
• Participate in code reviews, architecture discussions, and sprint planning.
• Collaborate with DevOps and infrastructure teams on deployment, monitoring, and incident response.
• Own features from design through deployment, including writing documentation and runbooks.
• Ensure high availability, reliability, and security of backend services in a SaaS environment.

Required Skills & Experience :

• 24 years of professional backend development experience.
• Strong proficiency in Python (3.9+) with at least 12 years of hands-on FastAPI or equivalent async framework experience.
• Solid understanding of RESTful API design principles, authentication (JWT/OAuth), and API versioning.
• Experience with relational databases PostgreSQL preferred including schema design, query optimization, and migrations.
• Comfortable with Git-based workflows, CI/CD pipelines, and containerized deployments (Docker).
• Basic experience with Kubernetes should have deployed applications to a cluster and troubleshot pod/service-level issues.
• Good understanding of software design patterns, SOLID principles, and writing testable code.
• Strong problem-solving mindset with clear communication skills.
• Knowledge of any major cloud platform (AWS, GCP, or Azure).
• Prior experience working in early-stage or high-growth startup environments.

Why Join Us? :

• Real impact : Work on a product that directly affects how companies spend hundreds of millions on cloud. Your code ships to paying customers.
• Growth path : Clear trajectory to Senior Engineer within 1824 months based on impact and ownership.
• Mentorship & learning : Work alongside senior engineers with deep cloud and infrastructure expertise. Regular architecture deep-dives, tech talks, and hands-on exposure to system design at scale.
• Modern Tech Stack : Python, FastAPI, ClickHouse, PostgreSQL, Kubernetes, and AI-assisted development workflows.
• Startup energy, real traction : Fast-paced culture with ownership and autonomy backed by a product thats already serving customers in production.