Full Stack Engineer

Synthlane; Gurugram District; On-site; INR 900,000 - 1,300,000; Full time

Job summary

Synthlane is seeking a Full Stack/Backend Engineer to design scalable backend services and data-driven applications using Python, FastAPI, PostgreSQL, and React.js. You will work with product, frontend, and data teams to optimize databases, build data pipelines, and debug production issues.

The ideal candidate will design robust APIs, implement efficient queries, and contribute to architecture discussions while following best practices in code quality and testing.

Qualifications

• Strong proficiency in Python.
• Proficiency in React.js.
• Hands-on experience with FastAPI or similar Python web frameworks.
• Strong knowledge of PostgreSQL, SQL, database design, indexing, and query optimization.
• Experience building and integrating REST APIs.
• Strong debugging and troubleshooting skills.
• Ability to diagnose application, database, API, and data-related production issues.
• Understanding of backend architecture, scalability, and performance optimization.
• Familiarity with Git and version-control workflows.
• Experience with Langgraph, langfuse, evals is a plus.

Responsibilities

• Design, develop, and maintain scalable backend services using Python and FastAPI.
• Write component based frontend apps using React.js.
• Build and maintain REST APIs and backend integrations.
• Design efficient database schemas and write optimized queries in PostgreSQL.
• Integrate backend applications with databases, third-party services, and data platforms.
• Perform debugging, root-cause analysis, and performance optimization.
• Write clean, maintainable, testable, and well-documented code.
• Collaborate with engineering and product teams on architecture and technical solutions.
• Participate in code reviews and follow backend development best practices

Skills

Python

React.js

FastAPI

PostgreSQL

API Design

HLD

LLD

Data Structures

REST APIs

Debugging

Performance Optimization

Database Design

Tools

Docker

Git

AWS

Azure

GCP

CI/CD

Monitoring Tools

Langgraph

langfuse

evals

Job description

Job Description

We are looking for a Full Stack/Backend Engineer with strong experience in building scalable backend systems, APIs, and data-driven applications. The ideal candidate should be comfortable working with Python/FastAPI, PostgreSQL, React.js and production debugging.

You will work closely with product, frontend, and data teams to design reliable backend services, optimize database performance, build data pipelines, and troubleshoot issues across applications and infrastructure.

Key Responsibilities

• Design, develop, and maintain scalable backend services using Python and FastAPI.
• Write component based frontend apps using React.js.
• Build and maintain REST APIs and backend integrations.
• Design efficient database schemas and write optimized queries in PostgreSQL.
• Integrate backend applications with databases, third-party services, and data platforms.
• Perform debugging, root-cause analysis, and performance optimization.
• Write clean, maintainable, testable, and well-documented code.
• Collaborate with engineering and product teams on architecture and technical solutions.
• Participate in code reviews and follow backend development best practices

Requirements

Required Skills

• Strong proficiency in Python.
• Proficiency in React.js
• Hands-on experience with FastAPI or similar Python web frameworks.
• Strong knowledge of PostgreSQL, SQL, database design, indexing, and query optimization.
• Experience building and integrating REST APIs.
• Strong debugging and troubleshooting skills.
• Ability to diagnose application, database, API, and data-related production issues.
• Understanding of backend architecture, scalability, and performance optimization.
• Familiarity with Git and version-control workflows.
• Experience with Langgraph, langfuse, evals is a plus

Good to Have

• Experience with AWS, Azure, or GCP.
• Knowledge of Docker and containerized applications.
• Familiarity with CI/CD pipelines.
• Experience with application monitoring and logging tools.
• Understanding of asynchronous programming and distributed systems.

Core Skills

Python | FastAPI | React.js | PostgreSQL | API Design | HLD | LLD | Data Structures | REST APIs | Debugging | Performance Optimization | Database Design