Application Engineer
Listed on 2026-02-16
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Software Development
Software Engineer, Backend Developer
About This Position
The Fin Tech team is responsible for building and managing real-time APIs, both for our integrating partners, and payment processing industry vendors. The team is also responsible for building and managing the core system logic to batch payment data and integrate with the banking system for funding and accounting. The team builds internal tools to manage merchant onboarding and payment exception handling.
The Fin Tech team is also looking for an outstanding, brilliant, and driven Application Engineer to join our growing team. While our Application Engineers are involved in multiple activities across the Technology organization, they primarily work with Technology and Business teams to design, build, and implement web and process applications. These Team Members assist the Client Success department in resolving issues related to production processes and are responsible for troubleshooting and resolving technical issues.
WhatYou'll Do
- Proposes technical solutions to the Manager, Application Engineering
- Designs/develops/tests/implements improvements or new features into the Waystar website and core processing applications
- Responsible for developing/augmenting applications based on the functional and technical specifications
- Adheres to Waystar coding standards and the approved technologies, and proposes amendments when necessary
- Unit tests all changes on development, and then works with the appropriate Business and/or Technology Owner(s) to ensure that the developed solution meets the business requirements
- Communicates the development progress daily to the senior-level team members
- Attends to any work items assigned through the internal case system in a timely fashion
- Takes ownership of work items assigned, communicates estimates and daily progress as part of the SDLC process, and actively works to resolve issues blocking progress
- Assists in the QA process
- Participates, as required, in Production Code Turn days, providing instructions for deploying the code changes successfully, and for Smoke Testing code post-release
- Develops and maintains open and fluid communication with Management
- Develops and maintains a positive relationship with other team members
- Assists in the creation and/or approving of technical specifications
- Assists in identifying areas in the application that need to be refactored
- Works with departments and team members to design and implement various new enhancements to the existing web application, including SQL table design, SQL stored procedure design, and process design in the designated programming language
- Tracks changes using internal tools and communicates to the QA Team any abnormalities required to push changes from development through the stages to production
- Identifies and informs the Manager, Application Engineering of areas for refactoring, optimization, or other improved technology solutions
- Notifies the Manager, Application Engineering of any problems that negatively impact applications, and works to implement a solution
- Communicates with the Manager, Application Engineering to reassign items that cannot be addressed promptly
- Provides estimates for project tasks using an internal project tool, and updates estimates if they increase or decrease
- Additional duties as assigned
- Experience with statically typed / compiled languages (c#, java, c, go)
- Experience with dynamically typed / interpreted languages (java script, python, php)
- Experience with Relational Databases (sql server, mysql, postgres)
- Experience with cloud technologies (aws, gcloud, azure)
- Experience with Version Control (git)
- Experience with Unit and Integration Testing Methodologies
- Experience building highly-scalable software solutions
- Excellent written and verbal communication skills
- Ability to work in a fast-paced environment & welcome change
- Highly self-motivated
- Experience scaling real-time high availability APIs
- Experience integrating with payment gateways and processors (Stripe, Elavon, , NMI, USAePay, World Pay, TSYS, etc)
- Experience with finance and banking processes and concepts (merchant accounts, ACH, settlement, etc)
Through a smart platform and better…
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