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Sr Software AI Engineer 3 - Context Engineering

WEX Inc. is a global commerce platform that simplifies the business of running a business by offering personalized technology solutions for employee benefits, mobility and fleet management, and corporate payments.

wex

Employee count: 5000+

Salary: 140k-186k USD

United States only

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As an AI Platform Engineer (SDE 3), you will be a key builder of the high-performance software foundation that powers our enterprise AI. While your expertise lies in distributed systems and cloud-native architecture, you will apply these skills specifically to the "Context Layer"—the specialized infrastructure required to fuel next-generation Agentic AI workflows. You will work at the intersection of systems programming and modern AI infrastructure to solve practical problems in real-time data orchestration and multi-cloud compute optimization. This is a "platform-as-a-product" role where you build the tools and SDKs that enable other engineers to build autonomous agents with ease.

Key Responsibilities

  • AI Infrastructure Implementation: Contribute to the development of a high-scale, AI-ready Data Lakehouse optimized for AI Agent operations and low-latency context retrieval.

  • Agentic R&D & Prototyping: Hands-on prototyping of emerging architectural patterns, such as Multi-Agent Orchestration and autonomous long-term memory management.

  • Engineering Excellence: Maintain high standards for code quality and CI/CD, participating in cross-functional architecture reviews and troubleshooting complex system bottlenecks.

  • Agentic Ecosystem Development: Build platform-level interfaces for agentic workflows, focusing on "Host-to-Server" communication and tool-execution environments.

  • Contextual Fabric Construction: Develop systems that move beyond basic search into Reasoning-based Retrieval, helping the platform understand the intent behind an agent's query.

  • Protocol Integration: Implement emerging standards like the Model Context Protocol (MCP) and Agentic RAG to ensure interoperability between the platform and various LLM providers.

Qualifications & Experience

Software Engineering & Systems

  • Experience: 6+ years of software engineering experience with a focus on distributed systems.

  • Core Languages: Proficiency in Java or Scala and Python.

  • Framework Development: Experience building extensible APIs and libraries used by other developers.

  • Software-Defined Infrastructure: A preference for building automated, software-defined infrastructure over manual configuration.

Agentic Development & AI Trends

  • Agentic Design: Hands-on experience with agent development frameworks such as LangGraph or CrewAI and the transition from static RAG to Agentic RAG.

  • Interoperability: Knowledge of the Model Context Protocol (MCP) and how it allows AI agents to interact with diverse data sources.

  • AI-Ops: Experience building "AI-native" features, including automated LLM-based evaluations within the CI/CD pipeline.

  • Safety & Governance: Understanding of Human-in-the-Loop (HITL) triggers to ensure safety in autonomous systems.

CI/CD & Cloud Operations

  • GitOps & Delivery: Experience with GitOps workflows (e.g., ArgoCD or Flux) to manage versioned platform configurations and AI prompt templates.

  • Infrastructure-as-Code (IaC): Proficiency in Terraform to build reusable modules that enforce organizational standards across cloud accounts.

  • Modern Pipelines: Ability to design CI/CD pipelines (e.g., GitHub Actions) that integrate automated testing and security scanning.

  • Cloud Mastery (AWS & Azure): Hands-on experience navigating and configuring AWS and Azure Management Consoles, including core services like IAM, EC2/VMs, and S3/Blob storage.

  • Observability: Experience using OpenTelemetry (OTel) to track system performance and AI-specific success metrics.

Leadership & Education

  • Collaboration: A proven track record of collaborating across autonomous teams to drive the adoption of new technologies.

  • Communication: Ability to clearly communicate technical trade-offs to both fellow engineers and stakeholders.

Education: Bachelor’s or Master’s degree in Computer Science (Distributed Systems focus) preferred, or equivalent deep industry experience.

The base pay range represents the anticipated low and high end of the pay range for this position. Actual pay rates will vary and will be based on various factors, such as your qualifications, skills, competencies, and proficiency for the role. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan. WEX's comprehensive and market competitive benefits are designed to support your personal and professional well-being. Benefits include health, dental and vision insurances, retirement savings plan, paid time off, health savings account, flexible spending accounts, life insurance, disability insurance, tuition reimbursement, and more. For more information, check out the "About Us" section.Pay Range: $140,200.00 - $185,800.00

About the job

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Job type

Full Time

Experience level

Salary

Salary: 140k-186k USD

Experience

6 years minimum

Location requirements

Hiring timezones

United States +/- 0 hours

About wex

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WEX Inc. is a global commerce platform that simplifies the business of running a business. Many of our customers face the challenge of managing complex operational processes due to the rapid pace of regulatory, economic, and societal change worldwide. They are often stretched thin and lack the in-house expertise to solve these intricate problems. This is why WEX offers personalized technology solutions designed to simplify employee benefits, mobility and fleet management, and accounts payable and receivables processes. From our origins as a pioneer in fleet card payments in 1983, we have expanded our scope to become a multi-channel provider of corporate payment solutions, helping businesses navigate these complexities and achieve greater efficiency.

Our customers in the fleet industry, for example, need robust tools to manage fuel and maintenance expenses, ensure driver safety, and optimize operations. WEX Fleet provides them with fuel cards, telematics, and data analytics to meet these needs. For businesses involved in travel, managing cross-border payments and streamlining back-end accounting can be a significant hurdle. WEX's travel and corporate solutions, including virtual payment solutions, help these clients automate processes, reduce costs, and gain better insights into their spending. Similarly, in the healthcare sector, employers and employees alike grapple with the administration of benefits and healthcare payments. WEX Health offers a cloud-based platform to simplify the management of Health Savings Accounts (HSAs), Flexible Spending Accounts (FSAs), and other benefit plans, making it easier for millions of consumers to manage their healthcare expenses. By embedding our solutions into our customers' workflows and leveraging our expertise in data and analytics, we empower them to make smarter decisions, reduce operating costs, and ultimately, reach their full potential.

Employee benefits

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Company equity

WEX offers company equity.

Life insurance

WEX offers life insurance.

Paid sick days

WEX provides paid sick days.

Sabbatical

WEX offers sabbatical leave.

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