Jobs in the United States

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Added 5 days ago
Software Developer
MANTECH
Eglin AFB, FL
Solid programming competency in C# (.NET) and/or Python.
Added 5 days ago
Software Engineer (Embedded / Machine Systems)
Coats
LaVergne, TN
Added 5 days ago
Sr. Manager, Software Engineering
FEI EFA, Inc.
Fremont, CA
Provide hands-on technical leadership in C#, .NET, WPF, and Windows desktop application development, including architecture, design reviews, code reviews, debugging, and resolution of…
Added 5 days ago
Advanced Cyber Security Architect/Engineer
Honeywell
Duluth, GA
5+ years of backend focused development (C# .NET) OR frontend focused development (JavaScript / NodeJS, HTML5) OR development focused on interpreted languages (Python, PowerShell, bash)
Added 5 days ago
Senior Full Stack Developer
Hub International Limited
Chicago, IL
·Strong proficiency in C#, .NET, React (or similar), TypeScript, JavaScript, HTML, CSS and SQL.
Added 5 days ago
RPA Senior Manager - Intelligent Automation
Baker Tilly Advisory Group, LP
Remote, United States
3+ years’ experience with object-oriented programming (.NET, C#, Python, etc.) or platform infrastructure support.
Added 5 days ago
C
Senior Web Developer
Cotiviti
United States
- $112,000 to $124,000 USD / year
5+ years' experience with the following: C#, ASP.NET, MVC, JavaScript, CSS, HTML, Source Control, Use of 3rd party libraries (Telerik), JSON, AJAX, JQuery, Bootstrap, WCF, .NET Framework…
Added 5 days ago
RU
AI Applications Developer
Randstad USA
Phoenix, AZ
- $60 to $67 USD / hour
Programming & Frameworks: Proficiency in Python, SQL, and C# (.NET Framework).
Added 5 days ago
Software Development Specialist 3
State of Ohio
Columbus, OH
Added 5 days ago
.NET/C# Developer
Charles Schwab Inc.
Austin, TX · Southlake, TX
Experience developing back-end solutions using C#, ASP.NET, MVC frameworks, and RESTful and/or SOAP APIs.
Added 5 days ago
MI
Mid-level Back-End Software Engineer (TS/SCI)
Maxar Intelligence I
Westminster, CO
- $140,000 to $200,000 USD / year
Strong proficiency in at least one modern back-end programming language, such as Python, Java, Go, or C#, with demonstrated experience developing production-quality software.
Added 5 days ago
Student Systems Finance Developer/ Programmer
Covista
Lisle, IL
Strong experience modifying and supporting custom .NET desktop applications (WinForms and WPF) built with C# and VB.NET, including developing against SQL Server databases.
Added 5 days ago
Student Finance Systems Programmer/Developer
Covista
Minneapolis, MN
Strong experience modifying and supporting custom .NET desktop applications (WinForms and WPF) built with C# and VB.NET, including developing against SQL Server databases.
Added 5 days ago
AD
Principal Software Engineer - Digital Media
Avery Dennison
Little Rock, AR
- $120,000 to $180,000 USD / year
Strong proficiency in backend development (C#/.NET, Java, or Go) and frontend frameworks (Angular, React, or Vue).
Added 5 days ago
AD
Principal Software Engineer - Digital Media
Avery Dennison
Dallas, TX
- $120,000 to $180,000 USD / year
Strong proficiency in backend development (C#/.NET, Java, or Go) and frontend frameworks (Angular, React, or Vue).
Added 5 days ago
Principal Developer - AI
United Airlines
Houston, TX
Strong software engineering skills, with proficiency in Python and experience with enterprise development technologies such as C#/.NET.
Added 5 days ago
A
Software Engineer
Actalent
St. Louis, MO
- $67.5 USD / hour
Experience developing and supporting MES solutions using C# and .NET.
Added 5 days ago
IC Test Engineer
Keysight Technologies, Inc.
Santa Rosa, CA
Software development/SW programming proficiency in one of the following languages is required: C#, C++/.NET, C, Visual Studio
Added 5 days ago
Platform Engineer
Wellmark, Inc.
Des Moines, IA
Development Experience: (Ex: Angular 2 (or newer), NodeJS (or newer), TypeScript, C#, .NET, Java, SQL)
Added 5 days ago
QA Engineer 3
Onto Innovation Inc-US
United States
Excellent skillset focused on Windows development, the .NET platform (C#, C++), and relational databases (SQL Server a plus)
Added 5 days ago
Analyst Lead, Cybersecurity
FIS INC (OLD FIS)
United States
Conduct in-depth manual source code reviews across languages such as Java, C#/.NET, Python, JavaScript/TypeScript, Cobol, Go and Kotlin/Swift. You will look for business logic flaws,…
Added 5 days ago
Senior Applications & Integration Engineer
COGENT BANK
Lake Mary, FL
Added 5 days ago
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Mainframe Developer
Procom
Southlake, TX
- $65 USD / hour
Exposure to distributed and cloud technologies (GCP, Java, JavaScript, .NET, C#, Spring Boot, MongoDB, Postgres, etc.) and AI tools (GitHub Copilot, others)
Added 5 days ago
Platform Engineer
Wellmark, Inc.
Des Moines, IA
Development Experience: (Ex: Angular 2 (or newer), NodeJS (or newer), TypeScript, C#, .NET, Java, SQL)
Added 5 days ago
Senior .NET AppDev Consultant
Trility Consulting
Remote, United States
Design, develop, test, and support production-quality applications using .NET, C#, Angular, and modern full-stack development practices.

Procom

Mainframe Developer

Southlake, TX, United States

$65 USD / hour

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Job details

Pay: $65 USD / hour
Posting language: English
Posted: Nov 3, 2026

Original job description

Mainframe Developer (Application Modernization)

Assignment Details

Duration: 6-month contract No C2C/ No Sponsorship, W2 only Location: Onsite 4 days/week in Southlake or Austin, TX Interview: Candidates must be willing to attend an onsite interview if requested

Position Overview Our financial client is seeking an experienced Mainframe Software Developer with expertise in application modernization, specifically in interfaces between legacy mainframe and distributed applications. The developer is responsible for the architecture, design, development, and implementation of complex software solutions that support the firm’s processing capabilities. The candidate should be well versed in AI coding tools and agentic AI and inclined to use AI to improve productivity.

What You’ll Do

Collaborate with cross-functional teams to understand business requirements and identify modernization opportunities Contribute to solutioning, design, and implementation of modernization strategies for legacy applications, including mainframe migration and refactoring and mainframe callouts to distributed platforms Build interfaces between legacy and modern distributed applications Evaluate existing legacy systems and propose solutions to improve performance, scalability, and maintainability Develop and maintain automated processes for legacy applications for consistency and efficiency Stay current with emerging technologies and industry trends in legacy modernization Use AI tools to improve productivity Mentor the technical team, supporting developers who want to expand into mainframe and distributed technologies, including geographically distributed teams Communicate and collaborate with business stakeholders, platform teams, architects, and other domain teams Meet project timelines, address obstacles proactively, and deliver high-quality results

Required Qualifications

BS in Computer Science, Software Engineering, or a related field 10+ years of experience in mainframe technologies: COBOL, JCL, DB2, Datacom, SQL, SQL stored procedures, messaging queues (IBM MQ, Kafka), CICS, Easytrieve, REXX, and SORT utilities 10+ years of experience as a software developer, with at least 3 years in a lead or co-lead role 3-4 years of experience with tools such as Control-M, ChangeMan, File-AID, Startool, STARBAT, Xpediter, TOAD, and SPUFI Strong experience with high-volume transaction processing and brokerage experience Good knowledge and hands-on experience in the financial industry, specifically brokerage transactions, balances, positions, and books and records systems Proven record of participating in architecture, design, and development of complex enterprise-level systems Experience with legacy application modernization Demonstrated use of AI and AI agents to increase productivity Strong understanding of software architecture patterns, design principles, and scalability Excellent problem-solving, critical thinking, and decision-making skills Effective communication and cross-functional collaboration skills Experience mentoring development teams, including geographically distributed teams

Preferred Qualifications

Exposure to distributed and cloud technologies (GCP, Java, JavaScript, .NET, C#, Spring Boot, MongoDB, Postgres, etc.) and AI tools (GitHub Copilot, others) Familiarity with file transmissions, cloud, SPOS, callouts from mainframe to distributed services, security tokens, and authentication mechanisms Strong preference for experience with high-volume brokerage transaction processing and posting, both batch and real-time

Procom provides Basic Life/AD&D insurance, Short- and Long-Term Disability, and EAP at no cost to eligible employees after a waiting period. Medical and dental coverage (employee premium contributions), a non-matching 401(k) plan, and additional voluntary coverage are also available. This role includes legislatively required paid leave; no bonus, commission, or equity compensation applies.

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