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As400 Programmer Jobs in Washington (NOW HIRING)

M.C. Dean, Inc

Accounts Payable 2 - Tysons, VA

Tysons, VA · On-site

$19.50 - $24.50/hr

Our people are passionate about engineering innovation that improves lives and drives impactful ... Accessing financial data within AS400 and internal software systems to answer general questions as ...

M.C. Dean, Inc

Accounts Payable 1 - Tysons, VA

Tysons, VA · On-site

$21.07 - $26.34/hr

Our people are passionate about engineering innovation that improves lives and drives impactful ... Accessing financial data within AS400 and internal software systems to answer general questions as ...

AON PLC

Ops & Tech Specialist III

Fort Washington, MD · On-site

$85K - $100K/yr

AS400 preferred; AuMine, Majesco, InsPro, Wintam, CoverWallet, and SmartComm experience a plus. * Prior programming, application support, systems analysis, or experience working closely with ...

M.C. Dean, Inc

Project Controls, Staff

Bethesda, MD · On-site

$90K - $113K/yr

Our people are passionate about engineering innovation that improves lives and drives impactful ... AS400 (internal) CMMS software * Primavera P6 software We offer an excellent benefits package ...

M.C. Dean, Inc

Project Controls, Staff

Manassas, VA · On-site

$90K - $113K/yr

Our people are passionate about engineering innovation that improves lives and drives impactful ... AS400 (internal) CMMS software * Primavera P6 software Abilities: * Exposure to computer screens ...

M.C. Dean, Inc

Project Controls, Senior

Tysons, VA · On-site

$104K - $130K/yr

Our people are passionate about engineering innovation that improves lives and drives impactful ... AS400 (internal) CMMS software Primavera P6 software Abilities: * Exposure to computer screens for ...

M.C. Dean, Inc

Project Scheduler 1 - Tysons VA

Tysons, VA · On-site

$75K - $113K/yr

Our people are passionate about engineering innovation that improves lives and drives impactful ... AS400 (internal)CMMS software * Primavera P6 software We offer an excellent benefits package ...

All JobsAs400 Programmer JobsAs400 Programmer Jobs in Washington

As400 Programmer information

See Washington salary details

$112.1K

$116.1K

$118.9K

How much do as400 programmer jobs pay per year?

As of Sep 14, 2026, the average yearly pay for as400 programmer in Washington is $116,091.00, according to ZipRecruiter salary data. Most workers in this role earn between $114,400.00 and $117,800.00 per year, depending on experience, location, and employer.

What is an AS/400 programmer?

AS400 Programmers are IT professionals who specialize in developing, maintaining, and supporting software applications on the IBM AS/400 (now IBM i) platform. They use programming languages like RPG, COBOL, and CL to write and troubleshoot code for business applications, often in industries such as finance, manufacturing, and logistics. Their work involves analyzing user requirements, designing solutions, and ensuring the stability and efficiency of AS400-based systems.

What are the key skills and qualifications needed to thrive as an AS/400 programmer?

To thrive as an AS400 Programmer, you need strong programming skills in RPG, COBOL, or CL, along with a solid understanding of IBM iSeries/AS400 systems and a relevant computer science degree or equivalent experience. Familiarity with tools such as IBM i Navigator, Query/400, and version control systems, as well as experience with database management (DB2), is typically required. Attention to detail, problem-solving abilities, and effective communication skills help you excel in troubleshooting and collaborating with business users. These competencies are essential for maintaining legacy systems, ensuring data integrity, and supporting critical business operations.

What are some common challenges faced by AS/400 programmers when maintaining legacy systems?

AS400 Programmers often encounter challenges such as integrating legacy IBM i systems with modern applications, troubleshooting undocumented or outdated code, and ensuring continued security compliance. Collaboration with business users and IT teams is essential to understand evolving requirements and minimize disruptions during updates or migrations. Staying current with both legacy and new technologies helps programmers bridge the gap between old systems and today’s business needs.
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As400 Programmer jobs near you
Infographic showing various As400 Programmer job openings in Washington as of August 2026, with employment types broken down into 63% Full Time, and 37% Contract. Highlights an 100% In-person job distribution, with an average salary of $116,091 per year, or $55.8 per hour.

UI/UX Developer with AS400--Only Local

Linthicum Heights, MD • On-site

InfiCare
Recruiting and Staffing Services • 51 - 200 employees
Learn more about InfiCareexternal

$49 - $63.75/hr

Other

This job post has expired today. Applications are no longer accepted.

Job description

Job Title: UI/UX Developer with AS400

Location: Linthicum, MD

Job Type: Contract

Work Model: Hybrid

Experience: Mid to Senior level

Job Overview  

We are looking for a UI/UX Developer with strong AS400 experience to join our team on a contract basis. The ideal candidate will have a solid understanding of modern UI/UX principles along with hands-on experience working with AS400/iSeries applications and legacy systems.

Key Responsibilities  
  • Design and develop intuitive, user-friendly interfaces for enterprise applications
  • Analyze existing AS400/iSeries applications and identify opportunities for UI/UX improvements
  • Create wireframes, prototypes, mockups, and user flows
  • Collaborate with AS400/RPG developers to integrate modern UIs with legacy backend systems
  • Conduct usability testing and incorporate user feedback into design improvements
  • Participate in application modernization initiatives involving legacy systems
  • Ensure consistency, accessibility, responsiveness, and usability across applications
  • Document UI/UX standards, workflows, and design specifications
Required Skills  
  • Strong experience in UI/UX design and development
  • Hands-on experience with AS400 / IBM i / iSeries environments
  • Experience creating wireframes, prototypes, user flows, and mockups
  • Proficiency in HTML, CSS, JavaScript, and modern UI frameworks
  • Experience working with APIs and backend integration
  • Strong understanding of usability, responsive design, and accessibility
Preferred Skills  
  • Experience with RPG/RPGLE, DB2, CL, or IBM i environments
  • Knowledge of React, Angular, or similar frontend frameworks
  • Experience with Figma, Adobe XD, Sketch, or similar design tools
  • Background in enterprise application modernization projects
Location & Work Model  

Hybrid — Linthicum, MD. Candidates must be able to commute to the Linthicum, MD office on a regular basis.

Engagement Details  

Contract engagement. Duration and start date to be confirmed. To apply, please submit your updated resume along with your availability and location details.

Apply