Senior Python API Developer (5-8 Years Experience)

Location: Chennai

Experience: 5-8 Years

About the Role

We are seeking an experienced Senior Python API Developer to lead the design, development, and delivery of secure, scalable, and high-performance backend applications and RESTful APIs. The ideal candidate will bring deep expertise in Push (Webhook/Event-driven) and Pull (Request/Response) API integrations, strong database design judgment, and the ability to set technical direction across a team. This role carries end-to-end ownership of backend architecture decisions, from integration patterns through production performance, and expects fluency with modern AI-assisted development tools as a core part of the engineering workflow.

Key Responsibilities

- Lead the design, development, and delivery of RESTful APIs and backend services using Python.
- Architect Push (Webhook/Event-driven) and Pull (Request/Response) API integration patterns for high-volume, mission-critical systems.
- Own the design of secure, scalable, and high-performance backend services, setting standards for the wider team.
- Architect and optimize PostgreSQL or MongoDB schemas, including indexing strategy and query performance at scale.
- Write and review efficient SQL and MongoDB queries, and troubleshoot complex performance bottlenecks.
- Define and enforce API security standards JWT, OAuth2, API Key management, and secure-by-design practices.
- Own API documentation and contracts using Swagger/OpenAPI, and guide external and internal integration partners.
- Lead root-cause diagnosis and resolution of production API and database performance issues.




- Mentor junior and mid-level developers, lead code reviews, and drive engineering best practices across the team.
- Collaborate with cross-functional stakeholders product, QA, DevOps to translate business requirements into robust technical solutions.
- Champion and govern the responsible use of AI tools for coding, debugging, testing, and documentation, ensuring AI-generated code meets security and quality standards.

Required Skills

- Solid, proven Python programming skills with a track record of building production-grade systems.
- Deep hands-on expertise with FastAPI, Flask, or Django REST Framework.
- Advanced REST API design and integration experience, including high-scale or high-availability systems.
- Strong command of PostgreSQL or MongoDB, including schema design, indexing, and performance tuning.
- Solid grasp of JSON, XML, HTTP/HTTPS, and REST architectural principles.
- Proficiency with Git and standard branching/release workflows.
- Strong command of API security OAuth2, JWT, SSL/TLS, API Keys and secure coding practices.
- Experience building robust logging, exception handling, and application monitoring into production systems.
- Demonstrated experience using GitHub Copilot, ChatGPT, Claude, Cursor,



or similar AI-powered development tools in a professional workflow.
- Ability to write effective prompts, critically validate AI-generated code, and apply AI responsibly and securely.
- Prior experience as a technical lead, mentor, or owner of a significant feature area or service.

Preferred Skills

- Docker for containerized deployments.
- RabbitMQ, Kafka, or similar message brokers for event-driven architectures.
- CI/CD pipeline design and ownership.
- Microservices architecture and service decomposition experience.
- Experience defining or improving AI-assisted development workflows and AI-enabled IDE adoption for a team.

Qualifications

- Bachelor's degree in Computer Science, Information Technology, or a related field.
- 5-8 years of hands-on Python backend development experience, including at least 1-2 years in a senior or lead capacity.
- Relevant certifications are an advantage.

Good to Have

- Experience leading third-party API or enterprise application integration projects.
- Exposure to AWS, Azure, or Google Cloud Platform.
- Track record of driving API and database performance optimization initiatives.
- Agile/Scrum experience, including sprint planning and technical estimation.
- Passion for adopting emerging AI technologies to improve engineering efficiency and software quality.

Why Join Us? If you are an experienced Python engineer who enjoys owning systems end-to-end, solving complex integration challenges, mentoring talent, and using AI to build software smarter and faster, we would love to hear from you.

📌 Senior Python API Developer (Chennai)
🏢 Matrix Business Services
📍 Chennai