Senior Backend Engineer: Scale APIs for Financial Data

Mission Staffing; New York (NY); On-site; USD 130,000 - 180,000; Full time

Job summary

Mission Staffing is seeking a Backend Engineer to help turn complex, unstructured financial documents into data that powers real client decisions. The role intersects with LLMs, document parsing, and backend architecture, with an opportunity to build something technically hard and commercially meaningful from the ground up.

You will build and maintain APIs, databases, and infrastructure powering a growing suite of applications; partner with Product and Engineering to ship high-performance

Qualifications

• 7+ years backend engineering experience in startup/financial/tech.
• Strong Python fundamentals with FastAPI.
• Solid GraphQL and REST API design knowledge.
• Experience with databases and data warehouses.
• Hands-on DevOps including CI/CD and QA practices.
• Bachelor’s degree in CS/Engineering or related field.
• Self-directed with strong communication bridging technical and non-technical teams.

Responsibilities

• Build and maintain the APIs, databases, and infrastructure powering a growing suite of applications.
• Partner with Product and Engineering to scope and ship high-performance features.
• Own and evolve a scalable backend architecture strategy built to last for years, not quarters.
• Collaborate cross-functionally in an Agile environment.

Skills

Python

FastAPI

GraphQL

REST APIs

CI/CD

QA practices

Communication

Education

Bachelor's degree in Computer Science/Engineering

Tools

Databases

Data Warehouses

Git

Job description

Mission Staffing is seeking a Backend Engineer to help turn complex, unstructured financial documents into data that powers real client decisions. The role intersects with LLMs, document parsing, and backend architecture, with an opportunity to build something technically hard and commercially meaningful from the ground up.

You will build and maintain APIs, databases, and infrastructure powering a growing suite of applications; partner with Product and Engineering to ship high-performance