Software Development Engineer III

Busey

Software Development Engineer III building customer solutions on FirsTech’s payment-processing platform. Designing applications, advising architecture, and mentoring engineers across U.S.

Posted 8/21/2026full-timeRemote • Arizona, Colorado, Florida, Illinois, Kansas, Montana, Oklahoma, Texas • 🇺🇸 United StatesMid-LevelSenior💰 $106,000 - $150,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in C# programming, .NET development frameworks, and Microsoft SQL, while applying Agile methodologies and SOLID design principles. Proven ability to lead teams, mentor junior engineers, and deliver high-quality multi-tier application solutions.

Highest-signal resume keywords

C# Programming Language.NET Development FrameworksMicrosoft SQLAgile DevelopmentLeadership in Scrum Teams

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C# Programming Language.NET Development FrameworksMicrosoft SQLMicrosoft Azure Cloud ServicesContinuous Integration/Continuous DeliverySOLID Design PrinciplesApplication Architecture AnalysisQuality Assurance StandardsMulti-Tier Application SolutionsTroubleshooting

Soft Skills

Excellent Written CommunicationExcellent Oral CommunicationCollaborationCustomer Service SkillsAbility to Cope with Deadlines

Tools & Technologies

Microsoft Visual StudioMicrosoft Internet Information ServicesMicrosoft Azure DevOps

Industry Keywords

Agile DevelopmentQuality AssuranceTechnical Subject Matter ExpertMentoringCustomer Solutions

Tech Stack

Tools & technologies

AzureCloud.NETSQL

About the role

Key responsibilities & impact

Create new customer solutions using FirsTech’s payment processing platform
Interpret requirements from customers and product management
Create solutions within existing FirsTech development frameworks
Apply Agile development and Quality Assurance industry standards
Identify short- and long-term solutions to customer needs through logical thinking and troubleshooting
Research and experiment independently
Take initiative and ownership
Apply abstract thinking and reasoning
Apply SOLID design principles and good coding craftsmanship
Take on a leadership role within a development team
Serve as point-of-contact and subject matter expert for assigned application platforms
Analyze and recommend architectural changes to new and existing application solutions
Analyze and recommend improvements to development-team processes and procedures
Mentor junior Engineers
Report to the Vice President, Engineering

Requirements

What you’ll need

4–6 years of previous experience required
Knowledge of C# programming language
Knowledge of .NET development frameworks (multiple versions)
Knowledge of Microsoft SQL (multiple versions), including database hosting and development
Knowledge of Microsoft Internet Information Services (multiple versions)
Knowledge of Microsoft Visual Studio (multiple versions)
Knowledge of Microsoft Azure Cloud Services
Knowledge of Microsoft Azure DevOps
Knowledge of Continuous Integration/Continuous Delivery/Deployment
Advanced knowledge of the listed technical concepts
Ability to deliver high-quality multi-tier application solutions
Experience leading scrum teams
Experience mentoring others
Experience acting as a customer point-of-contact and technical subject matter expert
Bachelor’s Degree preferred
Excellent written and oral communication skills
Ability to collaborate within a diverse global team
Stellar customer service skills
Ability to cope with deadlines and pressure situations
Ability to mentor junior Engineers

Benefits

Comp & perks

Bonus or incentives based on company and individual performance may be available
401(k) match
Profit sharing
Employee stock purchase plan
Paid time off
Medical insurance
Dental insurance
Vision insurance
Company-paid life insurance
Long-term disability insurance
Supplemental voluntary life insurance
Short-term disability insurance
Wellness incentives
Employee assistance program
Pre-tax health savings accounts
Flexible spending accounts