Senior Python Backend Engineer

Tekskills; Pune District; On-site; INR 2,500,000 - 4,200,000; Full time

Job summary

Tekskills in Pune is seeking a Senior Backend Engineer with deep expertise in Python, FastAPI, and MongoDB to design and scale robust backend infrastructure, build high-performance APIs, and mentor teams through technical challenges.

You will debug production issues, optimize queries, architect end-to-end systems, integrate with cloud services and CI/CD pipelines, and explore AI-driven enhancements to development workflows. Experience with microservices, security, and monitoring tools is a plus.

Qualifications

• 8+ years of backend engineering experience.
• Proficiency in Python and FastAPI.
• Hands-on MongoDB experience.
• Strong debugging and problem-solving skills.
• Knowledge of backend design patterns, multithreading, and API security.
• Experience designing scalable infrastructure and cloud integration.
• Familiarity with Docker and CI/CD pipelines.
• Ability to document technical designs and use-case diagrams.
• Willingness to leverage AI tools to improve development efficiency.

Responsibilities

• Design, build, and maintain high-performance backend services using Python and FastAPI.
• Architect scalable, secure backend systems and microservices.
• Develop RESTful APIs and ensure integration with frontend and third-party services.
• Lead end-to-end system architecture including infrastructure and deployment pipelines.
• Work with MongoDB schema design, indexing, aggregation, and performance tuning.
• Optimize queries and data models for scalable, high-throughput apps.
• Debug production issues, perform root-cause analysis, and deliver robust fixes.
• Propose long-term solutions for systemic issues and technical debt.
• Create use cases, review architecture, and mentor junior developers.
• Leverage AI tools to accelerate development workflows and automation tasks.
• Collaborate with DevOps on cloud, containers, and CI/CD planning.

Skills

Python

FastAPI

MongoDB

Debugging

API design

Cloud platforms

Docker

CI/CD

Documentation

AI tooling

Multithreading

Security

Tools

Kafka

RabbitMQ

Prometheus

Grafana

ELK

AWS

Azure

GCP

Docker

CI/CD

Job description

Job Summary

Senior Backend Engineer with deep expertise in Python, FastAPI, and MongoDB. The ideal candidate is strong in debugging, core backend problem solving, architecting scalable systems, and leveraging AI-driven approaches to enhance development and design workflows. You will play a key role in designing backend infrastructure, building robust APIs, improving system performance, and mentoring teams through technical challenges.

Responsibilities

• Design, build, and maintain high-performance backend services using Python and FastAPI.
• Architect scalable, secure, and maintainable backend systems and microservices.
• Develop RESTful APIs and ensure seamless integration with frontend and third-party services.
• Lead the design of end-to-end system architecture, including infrastructure and deployment pipelines.
• Work extensively with MongoDB including schema design, indexing, aggregation pipelines, and performance tuning.
• Optimize queries and data models for scalable, high-throughput applications.
• Debug complex production issues, perform root-cause analysis, and deliver robust fixes.
• Identify systemic issues and propose long-term solutions.
• Create detailed use cases, troubleshoot technical debt, and improve existing codebases.
• Leverage AI tools to accelerate development workflows (e.g., debugging, architecture suggestions, documentation).
• Explore opportunities to integrate AI into backend systems and automation tasks.
• Contribute to infrastructure planning: cloud services, containerization, CI/CD pipelines.
• Collaborate with DevOps to ensure smooth deployment and monitoring.
• Work closely with cross-functional teams (product, design, QA).
• Mentor junior developers and contribute to engineering best practices.
• Participate in code reviews and architecture discussions.

Required Skills

• 8+ years of backend engineering experience.
• Strong proficiency in Python and frameworks such as FastAPI (mandatory).
• Hands-on experience with MongoDB (mandatory).
• Excellent debugging, code-analysis, and problem-solving skills.
• Strong understanding of backend design patterns, multithreading, concurrency, and API security.
• Experience designing scalable infrastructure.
• Familiarity with cloud platforms (AWS/Azure/GCP), Docker, CI/CD (preferred).
• Ability to create clear technical documentation and use-case diagrams.
• Ability to leverage AI tools to improve development efficiency.

Good to Have

• Experience with microservices architecture.
• Knowledge of asynchronous programming.
• Exposure to distributed systems, message queues (Kafka/RabbitMQ).
• Experience with monitoring tools (Prometheus, Grafana, ELK).