Senior Backend Engineer, AI Platform (Remote)

WEX; Austin (TX); Remote; USD 122,000 - 146,000; Full time

Job summary

WEX in the North America Mobility space seeks a Sr. Software Engineer to architect and build the next generation Agentic AI Platform. You will design autonomous AI agents, MCP servers, and tools for advanced reasoning within a scalable fintech platform.

Join a platform team delivering high-performance backend services, REST and gRPC APIs, and robust testing, while collaborating with product and other engineers to drive features at velocity.

Qualifications

• Bachelor's degree in Computer Science or Software Engineering or equivalent.
• 5–8 years of professional software engineering experience.
• Strong knowledge of data structures and algorithms; OO design.
• Experience designing internet-scale services with reliability and security.

Responsibilities

• Design, develop, and maintain robust, scalable backend services.
• Develop public REST APIs and internal gRPC APIs for inter-service communication.
• Lead design decisions, mentor engineers, and ensure code quality with tests.
• Perform root-cause analyses, optimize performance, and ensure system reliability.

Skills

Java

SpringBoot

REST APIs

OO design

Distributed systems

Kafka

Docker

Kubernetes

OpenAI APIs

Python

Education

Bachelor's degree in Computer Science or Software Engineering

Tools

Kafka

Docker

Kubernetes

OpenAI APIs

Job description

WEX in the North America Mobility space seeks a Sr. Software Engineer to architect and build the next generation Agentic AI Platform. You will design autonomous AI agents, MCP servers, and tools for advanced reasoning within a scalable fintech platform.

Join a platform team delivering high-performance backend services, REST and gRPC APIs, and robust testing, while collaborating with product and other engineers to drive features at velocity.