WEX

Software Development Engineer 3- AI & Agentic Systems

WEX
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5 days ago
Portland, ME, USA +3 moreSenior
H1B sponsor

Base Salary

$122k - $146k/yr

Responsibilities

  • Design and deploy multi-agent workflows in AWS Agent Core, including state management, memory persistence, and complex tool interactions.
  • Build and own complete services, cross-platform integrations, and their full lifecycle.
  • Make data orchestration decisions involving MCP/API and Agents/Skills based on requirements and trade-offs.
  • Implement resilient systems with retries, circuit breakers, fallbacks, and maintainable testable designs.
  • Review code for security flaws and ensure services follow authentication standards such as OAuth scopes.
  • Design reliable, cost-aware cloud infrastructure with auto-scaling and failover strategies.
  • Own deployment packages, metadata frameworks, scripts, and automation manifests across sandbox environments.
  • Build and optimize CI/CD pipelines and reduce build times and feedback loops.
  • Resolve complex bugs such as intermittent issues, race conditions, and memory leaks.
  • Own service incidents, create triage runbooks and playbooks, and enable Tier 1/2 teams to resolve common platform errors.
  • Partner with Product Managers on performance, security, scalability, backlog prioritization, technical debt, and scope negotiation.
  • Mentor SDE 1s and 2s, delegate growth-oriented work, enforce code quality, facilitate engineering consensus, and lead knowledge-sharing initiatives.
  • Support internal AI adoption through education, coaching, and collaboration with external AI partners.

Requirements

  • Experience appropriate for an SDE Level 3 senior technical leadership role is required, although no specific numeric experience requirement is stated.
  • Ability to design complete services, solve complex integration problems, and own major initiatives end to end.
  • Experience with agentic workflows, AI-powered software, cloud architecture, deployment automation, CI/CD, resilient design, and incident resolution.
  • Ability to make trade-offs involving data orchestration, performance, security, scalability, cost, and maintainability.
  • Ability to mentor engineers, lead technical discussions, conduct empathetic code reviews, and negotiate technical scope with Product Managers.
  • Ability to learn and apply new programming languages and frameworks rapidly; no specific language is named.
  • Experience with Google Gemini, AWS Agent Core, Claude, or other third-party agentic integrations is relevant to the role.

Benefits

  • Benefits include health, dental, and vision insurance; retirement savings; paid time off; health savings and flexible spending accounts; life and disability insurance; tuition reimbursement; and additional benefits.
  • The stated base pay range is $121,500.00 to $145,500.00, with non-sales roles typically eligible for a quarterly or annual bonus.

Tech Stack

WEX

About WEX

5,001-10,000 employees

WEX is a public financial technology company that provides corporate payment solutions to fleets, healthcare/benefits administrators, and travel businesses. Its products include fuel and mobility cards, virtual card payments, and platforms for HSAs/FSAs/HRAs, with revenue from payment processing and software/service fees. Founded in 1983 and headquartered in Portland, Maine, WEX trades on the NYSE under WEX and was formerly known as Wright Express.

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