WEX Inc

Senior Software Development Engineer

WEX Inc$140K — $173K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent experience).
  • 8-10 years of software engineering experience with leadership in cross-team initiatives.
  • Expert proficiency in multiple programming languages and architectural patterns (like Microservices, Event-Driven).
  • Hands-on experience with large language models (LLMs) and designing multi-agent workflows.
  • Strong understanding of continuous delivery principles and automation tools (e.g., Jenkins, GitLab CI/CD).
  • Exceptional problem-solving skills with the ability to handle ambiguity.
  • Excellent communication skills tailored for various audiences.

Responsibilities

  • Collaborate with stakeholders throughout the SDLC to translate complex business requirements into effective solutions.
  • Lead the design and development of systems with a focus on Continuous Delivery practices.
  • Champion integrated engineering by defining service communication standards.
  • Architect and implement AI workflows to address high-value business challenges.
  • Resolve architectural bottlenecks across teams and review designs for quality and scalability.
  • Coordinate large-scale programs, creating project plans and managing risks confidently.
  • Research new methods to enhance team efficiency and align with industry trends.

Benefits

  • Health, dental and vision insurance options.
  • Retirement savings plan to support long-term financial goals.
  • Paid time off and flexible spending accounts for personal needs.
  • Tuition reimbursement for continued education opportunities.
  • Life and disability insurance for added peace of mind.
Full Job Description

How you’ll make an impact

  • Collaborate with stakeholders throughout the SDLC to translate complex business requirements into high-quality, reliable, cost-effective, and maintainable solutions that solve customer problems and generate business outcomes.

  • Lead the design and development of major systems or constellations of smaller systems with a focus on Continuous Delivery principles and practices.

  • Champion integrated engineering practices within the organization, defining "Golden Paths" for service communication and cross-team technical standards.

  • Architect and implement advanced AI workflows, including multi-agent orchestration, state management, and memory persistence to solve high-value business problems.

  • Solve architectural bottlenecks that cross team boundaries and review designs from other teams for consistency, scalability, and long-term supportability.

  • Coordinate large-scale programs across many dependent teams, independently creating project plans and managing materializing risks with a high degree of confidence in delivery.

  • Research and implement new ways to keep teams efficient, staying ahead of industry trends and Agile practices at both the team and enterprise level.

  • Act as a talent multiplier by mentoring senior engineers, leading by example in code reviews, and fostering a culture of technical excellence.

  • Serve as the "Adult in the Room" during crises, providing guidance to resolve issues, determining root causes, and implementing systemic changes to prevent repeat occurrences.

Core Skills:

  • Programming/Software Development: As a Staff Engineer, you are an expert across multiple tech stacks and move freely between them to solve complex hurdles. You set the organizational standard for clean, maintainable code and drive the development of autonomous agentic systems. You are the primary architect for complex systems, ensuring that software is designed not just for immediate features, but for long-term scalability, resilience, and cost-efficiency.

  • Testing: You drive the organizational strategy for quality by organizing and overseeing a library of regression tests as a shared resource. You balance risk, effort, and coverage by directing regular reviews of environment-specific test suites. You collate feedback from end-users and historical defects to assessment where the most systemic risk resides, focusing engineering efforts accordingly to ensure a high-quality user experience.

Additional Valuable Skills:

  • Systems Integration: You lead the integration of complex, cross-functional systems and third-party services. You are responsible for identifying and resolving integration bottlenecks that impact multiple product lines or dependent teams. Your role ensures that disparate components align architecturally to maintain a cohesive, resilient, and high-performing ecosystem.

  • Release and Deployment Management: You define and evolve the deployment strategy to ensure rapid, safe, and consistent delivery across the organization. By automating complex release workflows, you reduce manual effort and increase reliability across the program, managing the critical path for major initiatives spanning multiple dependent teams.

  • Methods and Tools: You define the technical vision for our tooling landscape, researching and adopting cutting-edge tools that improve decision-making and automate repetitive tasks. This ensures data-driven development and organizational efficiency, keeping the engineering team current in a rapidly evolving field.

Experience you'll bring 

  • Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent experience).

  • Minimum of 8-10 years of experience in software engineering and delivery, with a proven track record of leading multi-team initiatives.

  • Expert proficiency in multiple programming languages and modern architectural patterns (Microservices, Event-Driven, etc.).

  • Hands-on experience building with LLMs and designing multi-agent agentic workflows (handling state, memory, and tool calls).

  • Strong understanding of continuous delivery principles and mastery of automation tools (e.g., Jenkins, GitLab CI/CD, etc.).

  • Exceptional problem-solving and analytical skills, with the ability to navigate high degrees of ambiguity.

  • Excellent communication and negotiation skills, with the ability to tailor messaging for a wide variety of audiences, including senior leadership.

  • Ability to work independently and as a strategic lead within a cross-functional technical team.

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: $140,600.00 - $173,100.00

About WEX Inc

WEX Inc is a provider of corporate payment solutions. The company operates in three segments: Fleet Solutions, Travel and Corporate Solutions, and Health and Employee Benefit Solutions. The Fleet Solutions segment provides payment and transaction processing services to commercial and government fleets. The Travel and Corporate Solutions segment focuses on providing payment solutions to businesses that have employees who travel for work. The Health and Employee Benefit Solutions segment provides healthcare payment products and software, as well as payroll and HR solutions.
Learn more about WEX Inc
Size
5,600 employees
Market Cap
$6.9 billion
Industry
Net Income
-$243.6 million
Founded
1983
5 Year Trend
+12.8%
Revenue
$1.5 billion
NASDAQ

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