Backend Engineer: Scalable FinTech APIs & Services

Lendbuzz; Boston (MA); On-site; USD 120,000 - 170,000; Full time

Job summary

Lendbuzz in Boston is seeking a software engineer to join our engineering team. You will participate in all phases of software development, primarily building backend services in Python, supporting RESTful APIs and event-driven workflows, and collaborating with teams to create scalable, reliable systems.

You will contribute to frontend work with React, Next.js, and TypeScript when needed, research new tools, and help expand, test, and release products impacting thousands of customers.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience).
• 3+ years of backend development experience.
• Experience designing and implementing RESTful APIs, with familiarity in microservices and event-driven architecture.
• Fluency in relational database technology such as PostgreSQL.
• Strong grounding in testing methodologies, including TDD and automated testing frameworks.
• Experience with AWS or comparable cloud infrastructure.
• Familiarity with agentic development workflows and AI coding tools (Claude Code, Cursor, or similar).
• Working knowledge of React, Next.js, and TypeScript, with a willingness to contribute across the stack.
• Proven ability to work independently, with strong communication and interpersonal skills.

Responsibilities

• Participate in all phases of agile software development, including design, implementation, testing, and deployment.
• Build and maintain backend services in Python, supporting RESTful APIs and event-driven workflows.
• Collaborate with engineering teams to architect systems optimized for speed, scalability, and reliability.
• Contribute to frontend development in React, Next.js, and TypeScript, working across the full stack as product needs require.
• Research, prototype, and evaluate new tools and technologies to improve our development workflow.
• Develop internal tools and integrate with external APIs.
• Contribute to the expansion, testing, and release of products that impact thousands of customers.

Skills

Backend development

RESTful APIs

Microservices

Event-driven architecture

PostgreSQL

Testing (TDD)

AWS

AI coding tools

React/Next.js/TypeScript

Independent work & communication

Education

Bachelor's degree in CS/Engineering or related field

Tools

Claude Code

Cursor

PostgreSQL

AWS

Job description

Lendbuzz in Boston is seeking a software engineer to join our engineering team. You will participate in all phases of software development, primarily building backend services in Python, supporting RESTful APIs and event-driven workflows, and collaborating with teams to create scalable, reliable systems.

You will contribute to frontend work with React, Next.js, and TypeScript when needed, research new tools, and help expand, test, and release products impacting thousands of customers.