Top 193 Java/mainframe developer Jobs

.NET Mainframe Developer
System One —Vienna, VA
- Contract
- Remote
- Computer Science
- 5 years
- Java
- Health insurance
- Dental insurance
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Mainframe Developer
Fidelity TalentSource —Westlake, TX
- Temporary
- Computer Science
- Office
- 3 years
8d
Senior Mainframe Developer
Fidelity TalentSource —Westlake, TX
- Temporary
- 7 years
- Azure
- Bachelor of Science
Mainframe Software Development Engineer
Broadcom —Lisle, IL
- $109,700 - $175,500 a year
- Full-time
- Engineering
- Office
- 3 years
- Employee stock purchase plan
- Paid holidays
Tech lead - Java/AI Tech Lead/Sr Developer
Charles Schwab —Austin, TX
- $150,000 - $175,000 a year
- Hybrid work
- Office
- SQL
- AWS
- Paid parental leave
- Employee stock purchase plan
Mid Software Developer - Backend
Trilogy Innovations —Remote
- $111,000 - $114,000 a year
- Full-time
- Remote
- 5 years
- System design
- Mid-level
- Health savings account
- Disability insurance
11+ Years Senior JAVA Developer - Washington DC (In-person interview)
AHU Technologies Inc —Washington, DC
- $75 - $80 an hour
- Full-time
- Writing skills
- System design
- Office
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Java/AI Software Developer
Charles Schwab —Austin, TX
- $126,000 - $140,000 a year
- Hybrid work
- System design
- Research
- Office
- Paid parental leave
- Employee stock purchase plan
Principal IOM Mainframe Developer
Fidelity Investments —Smithfield, RI
- Full-time
- Bachelor of Science
- Java
- 8 years
11d
IT Apps Developer
Gulfstream Aerospace —Savannah, GA
- Full-time
- Computer science
- Computer Science
- English
Unix/Perl Developer
Tata Consultancy Services —Jersey City, NJ
- $100,000 - $115,000 a year
- Computer Science
- Mid-level
- Java
- Commuter assistance
- Health insurance
Sr. Application Developer II – Lewisville, TX
KTech Products —Lewisville, TX
- Oracle
- Computer Science
- Mid-level
Sr. Application Developer I – Lewisville, TX
KTech Products —Lewisville, TX
- Computer Science
- Office
- Senior level
Principal Software Engineer
Rocket Software —Perth, ND
- Email
- Research
- Office
- Java
Sr Mainframe Applications Programmer/Analyst
Labcorp —Burlington, NC
- Full-time
- Hybrid work
- 11+ years
- Research
- Office
- Employee stock purchase plan
- Disability insurance
Systems Specialist-Remote
Health Care Service Corporation —Richardson, TX
- $102,000 - $184,300 a year
- Full-time
- Remote
- Azure
- Salesforce
- Java
Automation Developer Analyst Sr
Huntington Bank —Columbus, OH
- Full-time
- Computer science
- Computer Science
- Mid-level
Senior Mainframe Technical Engineer
enGen —Pennsylvania
- $94,200 - $151,000 a year
- Weekends as needed
- Remote
- Computer science
- Computer Science
- 5 years
Software Modernization Enablement Lead Engineer
Agilent Technologies Inc —Santa Clara, CA
- $172,512 - $269,550 a year
- Full-time
- Azure
- Computer Science
- Windows
9d
Principal Software Engineer (Java/Angular/AWS/Kafka)
CYBREX Technologies —Woodlawn, MD
- $70 - $75 a year
- Contract
- Computer science
- Azure
- Doctoral degree
Quick Apply
10d

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.NET Mainframe Developer

System One -
Vienna, VA

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Job Details

Contract

Benefits

Health insurance
Dental insurance
401(k)
Vision insurance
Life insurance

Qualifications

Software issue identification
Systems integration
Software engineering
Data storage
Data Integration (Data management)
MVC
Incident management
Continuous Delivery (CD) implementation
Performance optimization
Tooling
Data structures
C#
Incident management software
Scalable systems
Microservices
System design for system development
Microcontroller programming
Quality issues
Version control systems
Algorithm design
GitHub
Scalability
Project management software
Agile software development
Technical troubleshooting support
DevOps automation
Project stakeholder communication
Design (software development lifecycle)
Web services design
Database software proficiency

Full Job Description

Job Title: .NET Developer

Location: Remote

Type: Contract

Contractor Work Model: Remote

Responsibilities

Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on integrating distributed applications with the organization's Core Banking platform.
Serve as a senior technical contributor responsible for translating business and platform requirements into secure, scalable, and reliable solutions across the full software development lifecycle.
Operate with minimal supervision while exercising strong technical judgment.
Collaborate with Core Banking, testing, middleware, and platform teams to manage dependencies, mitigate risk, and meet aggressive delivery timelines.
Design, develop, and optimize high-quality software applications using various, advanced programming languages and frameworks that meet business requirements.
Collaborate with stakeholders and team members to gather and analyze requirements, translate requirements into technical specifications, propose innovative solutions, and ensure timely task completion.
Write clean, scalable, and maintainable code that adheres to industry best practices and organizational coding standards.
Implement data structures and algorithms efficiently, optimizing code for performance, scalability, and user experience.
Identify, troubleshoot, and resolve errors in application function.
Conduct team code reviews, provide constructive feedback, and learn from colleagues' expertise to maintain a high-quality codebase.
Lead small efforts, while building strong working relationships with stakeholders, team members, and subject matter experts.
Contribute to generating and adhering to application and software development policies, standards, and procedures.
Continuously learn from individual and team experiences, fostering growth and improvement through collaboration and continuous feedback.

Requirements

Bachelor’s degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience.
5-7 years of experience in application or software development.
Advanced proficiency in software development principles, methodologies (including Agile), pipelines, and version control systems (Git and GitHub).
Expertise in programming languages / standards / build tools including Java, XML, Open API, Maven, and ANT, with strong knowledge of modern frameworks and libraries.
Deep understanding of web technologies and technical applications, capable of designing and implementing scalable solutions.
Strong problem-solving, analytical, and troubleshooting skills, with the ability to address complex technical issues efficiently.
Advanced written and verbal communication skills for articulating technical concepts to both technical and non-technical stakeholders.
Experience using incident tracking, project management, and change control software tooling.
Expertise in data structures, algorithms, and applying them in the design and build of applications for optimal performance and scalability.
Demonstrated experience with application development (web, desktop, or mobile) using C#, ASP.NET, and the Microsoft technology stack.
Experience writing and maintaining unit and integration tests; troubleshooting and resolving software defects.
Experience integrating data storage solutions (like SQL Server) and third-party APIs into application architectures.
Familiarity with ASP.NET Core, MVC, and the broader .NET ecosystem (.NET 4.x or .NET 6/8+).
Experience developing web services, microservices, RESTful APIs, and designing implementing common patterns and REST principles.
Knowledge of Continuous Integration & Delivery (CI/CD) pipelines and tools.

Available for a 12-month contract, providing an excellent opportunity to work on mission-critical projects within a dynamic team environment.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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Ref: #851-Rockville-S1

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java/mainframe developer jobs

.NET Mainframe Developer

Mainframe Developer

Senior Mainframe Developer

Mainframe Software Development Engineer

Tech lead - Java/AI Tech Lead/Sr Developer

Mid Software Developer - Backend

11+ Years Senior JAVA Developer - Washington DC (In-person interview)

Java/AI Software Developer

Principal IOM Mainframe Developer

IT Apps Developer

Unix/Perl Developer

Sr. Application Developer II – Lewisville, TX

Sr. Application Developer I – Lewisville, TX

Principal Software Engineer

Sr Mainframe Applications Programmer/Analyst

Systems Specialist-Remote

Automation Developer Analyst Sr

Senior Mainframe Technical Engineer

Software Modernization Enablement Lead Engineer

Principal Software Engineer (Java/Angular/AWS/Kafka)

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