Backend Engineer (C#/Python) with Full-Stack & Scale

Jobtailor; New York (NY); On-site; USD 120,000 - 170,000; Full time

Job summary

Jobtailor is seeking a software engineer to design and maintain robust backends in C#/.NET and Python (FastAPI), supporting large-scale, interconnected engineering datasets. You will help to optimize APIs for a real-time browser-based React frontend and contribute across the stack from infrastructure to frontend, leveraging AI-assisted workflows.

The role requires 3+ years of experience, strong memory management and asynchronous programming skills, and familiarity with PostgreSQL, cloud

Qualifications

• BS in Computer Science or related technical discipline.
• 3+ years of professional software engineering experience.
• Proficiency with AI-powered IDEs (Cursor, Copilot, etc.) and using AI to multiply impact.
• Full stack proficiency: React and TypeScript for frontend-backend integration.
• Backend mastery in C# / .NET or Python (FastAPI), with interest/experience in Rust or C++.
• Solid memory management, asynchronous programming, and low-latency design.
• Strong experience with relational databases (PostgreSQL) and API design.
• Cloud & Infra: AWS/Azure/GCP, Docker, and CI/CD (GitHub Actions).

Responsibilities

• Build scalable backends in C#/.NET and Python (FastAPI) for large-scale engineering datasets.
• Implement high-performance ECS and manage real-time data flows for solvers.
• Develop and optimize APIs (GraphQL, gRPC, REST) feeding a real-time React frontend.
• Contribute across the codebase from infrastructure to frontend using AI-assisted workflows.
• Design database schemas (PostgreSQL) and plan future migrations (e.g., Rust/C++).

Skills

3+ years software engineering

AI-assisted workflows

Full stack collaboration

Memory management

Education

BS in Computer Science or related

Tools

C# / .NET

Python (FastAPI)

React

TypeScript

PostgreSQL

GraphQL / REST / gRPC

AWS / Azure / GCP

Docker

CI/CD (GitHub Actions)

Rust / C++ interest

Job description

Jobtailor is seeking a software engineer to design and maintain robust backends in C#/.NET and Python (FastAPI), supporting large-scale, interconnected engineering datasets. You will help to optimize APIs for a real-time browser-based React frontend and contribute across the stack from infrastructure to frontend, leveraging AI-assisted workflows.

The role requires 3+ years of experience, strong memory management and asynchronous programming skills, and familiarity with PostgreSQL, cloud