Senior Backend Developer

Trellance Cooperative Holdings, Inc.; Bengaluru; On-site; INR 3,000,000 - 5,000,000; Full time

Job summary

CU Rise Analytics Pvt. Ltd. is hiring a seasoned Senior Python Backend Developer to lead design, development, and scaling of high-performance web systems.

You will leverage FastAPI to build asynchronous APIs, implement robust data models with SQLAlchemy and PostgreSQL, and ensure secure, self-documented APIs. The role requires 8+ years in backend development, with 5+ years in web development, and strong experience with Python and modern frameworks.

Qualifications

• 8+ years of backend software engineering experience.
• 5+ years building production web applications and APIs.
• Strong Python (6+ yrs) with async/await and type hints.

Responsibilities

• Design and develop RESTful APIs using FastAPI and established standards.
• Model data and implement PostgreSQL interactions with SQLAlchemy.
• Optimize queries, migrations, and caching strategies.
• Implement OAuth2/JWT security for authentication/authorization.
• Develop business logic in service and repository layers.
• Ensure API documentation with OpenAPI/Swagger.
• Write unit/integration/end-to-end tests.
• Create code and API documentation and architectural decisions.
• Collaborate with frontend teams on API contracts.
• Maintain high availability and performance optimizations.
• Participate in code reviews and debugging across the stack.
• Contribute to architecture decisions and tech standards.

Skills

Python

FastAPI

PostgreSQL

SQLAlchemy

OAuth2

JWT

Pydantic

AsyncIO

Docker

Kubernetes

CI/CD

Git

OpenAPI

Testing (pytest)

Tools

ORM (SQLAlchemy)

REST API design

OpenAPI/Swagger

Job description

CU Rise Analytics Pvt. Ltd. is a wholly owned subsidiary of Trellance, Inc. CU Rise Analytics is an offshore development centre of Trellance Inc., working collaboratively to offer comprehensive solutions for data analytics, technology and talent to allow our credit union clients to provide high quality service to their members and remain competitive. Our core expertise lies in data science and technology, encompassing data analytics, predictive modelling, business intelligence, and technology services.

Trellance Cooperative Holdings, Inc. is a credit union cooperative and leading technology partner for credit unions. Its companies – consisting of Rise Analytics, ProBridge, Optiri and CUDX – provide innovative technology solutions for credit unions to increase efficiency, manage risk and improve the member experience. Trellance’s mission is to make sure credit unions have access to the tools and resources they need to grow, enhance member value and remain competitive in a rapidly evolving financial landscape.

Summary:

We are seeking a seasoned Senior Python Backend Developer with a total of 8+ years of professional software engineering experience, including a minimum of 5+ years dedicated strictly to web development. In this role, you will lead the architectural design, development, and scaling of our high-performance web systems. You will leverage Fast API to build robust asynchronous APIs, utilize advanced ORM tools to design efficient data layers, and implement secure, self-documenting API standards.

Experience: 8+ years

Key Responsibilities:

• Design and develop RESTful APIs using Fast API following our established API standards and best practices.
• Implement robust data models and database interactions using SQL Alchemy and PostgreSQL.
• Optimize database queries, handle complex migrations (e.g., Alembic), and implement caching strategies.
• Implement secure authentication and authorization mechanisms using OAuth2 and JWT (JSON Web Tokens).
• Develop and maintain core business logic in service and repository layers.
• Ensure all endpoints are fully documented and compliant with OpenAPI/Swagger specifications using FastAPI's native capabilities.
• Write comprehensive unit, integration, and end-to-end tests for all code.
• Create clear, detailed documentation for code, APIs, and architectural decisions.
• Collaborate with frontend developers to define API contracts and integration points.
• Implement and maintain high availability patterns and performance optimizations.
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot and resolve complex technical issues across the application stack.
• Contribute to architectural decisions and help evolve our technology standards.

Required Skills and Experience:

• Overall 8+ years of professional experience in backend development.
• Minimum of 5+ years of dedicated experience in web development, building production-grade web applications and APIs.
• Strong proficiency in Python (6+ yrs) with solid understanding of type hints, async/await, and modern
• 2+ years of production experience with Fast API.
• Proficiency with relational databases, particularly PostgreSQL.
• Working knowledge of SQL Alchemy.
• Experience implementing RESTful APIs and understanding of API design principles.
• Strong understanding of software testing approaches (unit, integration, end-to-end).
• Familiarity with containerization (Docker) and container orchestration.
• Experience with Git version control and CI/CD pipelines.
• Knowledge of secure coding practices and common security vulnerabilities.
• Experience with Pydantic for data validation and schema definition.
• Familiarity with PostgreSQL advanced features (JSONB, full-text search, etc.).
• Experience with asynchronous programming in Python.
• Experience with Uvicorn, an ASGI web server, for Python.
• Understanding of infrastructure as code (Terraform, Azure Bicep).
• Experience with Kubernetes in production environments.
• Understanding of event-driven architecture and message brokers.
• Exposure to microservices architecture patterns.
• Experience with monitoring and observability tools.
• Contributions to open-source projects.
• Python 3.9+ features and language constructs.
• Type hints and static type checking with mypy.
• Error handling and exception management.
• Asynchronous programming with asyncio.

Web Frameworks and APIs:

• Practical experience implementing OAuth2 flows and securely managing JWT authentication.
• Expert-level production experience with FastAPI, Pydantic, and asynchronous Python programming
• Request validation and response formatting.

Database:

• PostgreSQL schema design and optimization.
• Deep, hands-on experience with modern Python ORMs, specifically SQLAlchemy (v2.0+)
• Query optimization and performance tuning.
• Strong proficiency in SQL (PostgreSQL, MySQL) and database migration tools like Alembic.

Testing:

• Proficiency in testing asynchronous code and secure endpoints using pytest
• Integration testing for APIs and databases.
• Mocking and fixtures.
• Code coverage analysis.

DevOps and Infrastructure (Nice to have):

• Solid knowledge of Docker, Kubernetes, and cloud ecosystems (Azure)
• Infrastructure as code concepts.

Development Standards Expertise:

The ideal candidate will demonstrate an understanding of and commitment to:

• Monitoring and logging implementation.
• High availability patterns
• Security by design
• Experience with Python performance profiling and memory management.
• Familiarity with database optimization techniques (indexing, connection pooling, and query plan analysis).
• Proven experience building self-documenting APIs with OpenAPI / Swagger UI.