19 results for Mainframe jobs

Mainframe Systems Programmer

Saint Paul, MN
remote
Temporary
43.5385 - 50.413 USD / Hourly
We are looking for a skilled Mainframe Systems Programmer to join our team. This role involves designing, developing, and maintaining both purchased and custom application solutions utilizing advanced iSeries technologies, including DB2/400 and RPG/400. As part of this long-term contract position, you will collaborate with IT developers, contract programmers, and customers to deliver innovative solutions that meet business needs. Responsibilities:• Design, develop, and implement application solutions using iSeries technologies such as DB2/400, CL/400, and RPG/400.• Apply business knowledge to develop and support individual software components, ensuring they align with functional requirements.• Collaborate with internal and external stakeholders to plan, analyze, and execute detailed designs for applications.• Conduct testing, review, and implementation of computer and business applications to ensure functionality and reliability.• Create and maintain technical documentation for application components following established lifecycle methodologies.• Manage and coordinate physical changes to databases, leveraging expertise in database management systems.• Independently handle development tasks while providing support and enhancements to deployed applications.• Offer training and guidance to other IT developers on newly developed systems.• Lead projects that interface with vendors and customers, ensuring effective communication and delivery of solutions.
2026-03-10T00:00:00Z

QA Analyst - Mainframe

Torrance, CA
onsite
Temporary
50 - 52.5 USD / Hourly
Our client is a leader in their industry and seeing a QA Analyst with expertise in automotive finance, specifically QA with Mainframe experience to join our team in Southern California. In this long-term contract position, you will play a pivotal role in ensuring the accuracy, compliance, and performance of our mainframe-based Customer Account Servicing System. This position involves working on complex systems and requires a hands-on approach to manual testing, defect identification, and test process optimization. Responsibilities:• Validate updates and upgrades to the Customer Account Servicing System to ensure compliance and functionality.• Analyze system bundles to classify changes as enhancements, corrections, or regulatory updates, and select appropriate testing methods.• Develop and execute manual test scripts in Quality Center for batch processes, online components, and interface impacts.• Perform production file comparisons by replaying data through batch processes and documenting output discrepancies.• Plan and implement test enhancements for custom modules to ensure compatibility and stability.• Collaborate with business stakeholders to review regulatory items and obtain necessary approvals.• Maintain detailed documentation linking test scripts, defects, approvals, and results for audit readiness.• Identify and report system defects, conduct root-cause analyses, and work with developers to resolve issues.• Manage and organize test data, batch input files, and credentials for mainframe testing environments.• Ensure adherence to change control practices and maintain traceability throughout the testing process.
2026-02-25T00:00:00Z

Java Back End Developer

Los Angeles, CA
onsite
Temporary
66.5 - 77 USD / Hourly
We are looking for an experienced Java Back End Developer to join our team on a contract basis in Commerce, California. This role focuses on developing and integrating robust backend solutions, ensuring seamless functionality and optimal system performance. The ideal candidate will possess advanced technical expertise and a strong ability to troubleshoot and debug complex systems. Responsibilities: • Develop and maintain backend systems using Java, ensuring high performance and reliability. • Implement file parsing, transformation, and generation processes to meet project requirements. • Integrate hardware systems and middleware applications, leveraging preferred technologies. • Conduct file format conversions and ensure compatibility across various platforms. • Design, develop, and maintain APIs to support data mapping and middleware logic. • Debug, test, and troubleshoot backend systems to ensure smooth integration and functionality. • Collaborate with cross-functional teams to align backend solutions with overall project goals. • Deliver high-quality code that adheres to best practices and industry standards. • Optimize backend processes to improve efficiency and scalability. • Document technical solutions and processes for future reference.
2026-03-12T00:00:00Z

Java Back End Developer

Chicago, IL
remote
Temporary
50 - 60.6 USD / Hourly
We are looking for a skilled Back End Developer to join our team on a long-term contract basis in Chicago, Illinois. In this role, you will contribute to the development and enhancement of mobile application back-end services for a large enterprise client. This is an opportunity to work within a collaborative environment alongside front-end and data specialists, focusing on impactful solutions. Responsibilities: • Design, build, and maintain scalable back-end services using Kotlin and Java. • Develop APIs and configure endpoints for production environments. • Collaborate with front-end and data teams to ensure seamless integration across systems. • Utilize modern frameworks and tools such as Ktor, Gradle/Maven, Liquibase, JUnit, and KoTest. • Work within cloud-native environments, leveraging platforms like AWS Elastic Beanstalk, Lambda, and Postgres. • Implement trunk-based development workflows through GitHub to ensure efficient and collaborative coding practices. • Troubleshoot and resolve technical issues to maintain system reliability and performance. • Participate in code reviews and contribute to the continuous improvement of development processes. • Follow best practices for software development to deliver high-quality, maintainable code.
2026-03-06T00:00:00Z

IBM Maximo Developer

New Orleans, LA
remote
Temporary
55 - 60 USD / Hourly
Senior IBM Maximo DeveloperEmployment Type: 26 Week Contract Location: RemotePay: Available on W2 Only OverviewWe are seeking a highly experienced Senior IBM Maximo Developer with deep expertise in IBM Maximo Application Suite (MAS) 9 and Field Service Management (FSM) / Maximo Mobile to support our electric utility operations.The ideal candidate is a technical leader with strong architectural judgment, a mobile‑first mindset, and the ability to design scalable, resilient solutions that support field operations, inspections, outage response, and compliance-driven workflows.Key Responsibilities<ul><li>Lead MAS 9 architecture and platform strategy, including configuration, governance, environment management (DEV/TEST/PROD), CI/CD, security, RBAC, and performance optimization.</li><li>Design and implement Maximo Mobile / FSM workflows for T&D field operations such as maintenance, inspections, safety tagging, and storm response.</li><li>Build offline‑first mobile solutions, optimize sync processes, and configure inspection forms, job plans, and digital procedures to enhance field usability and adoption.</li><li>Develop advanced Maximo customizations, including automation scripts (Jython/JavaScript), complex workflows, UI logic, asset hierarchies, predictive maintenance, and BIRT reporting.</li><li>Lead enterprise integrations using MIF and connect MAS 9 with OMS, GIS, SCADA, and ERP/financial systems while designing API and event-driven patterns.</li><li>Drive data migration and governance efforts, ensuring asset data quality, accuracy, and lifecycle traceability.</li><li>Support key T&D utility processes, including capital project tracking, asset commissioning, NERC compliance documentation, and reliability-centered maintenance programs.</li></ul>
2026-03-09T00:00:00Z

Software Development IV

Arlington, VA
onsite
Temporary
94.87 - 94.87 USD / Hourly
This role supports a key Federal defense program and is responsible for developing, maintaining, and enhancing complex software applications and frameworks across the full software release lifecycle. This role requires expert-level technical proficiency, strong problem-solving abilities, and the ability to contribute to multiple technical domains concurrently.This position works onsite in Arlington, VA, collaborating closely with an all-onshore engineering team. Ideal candidates will be able to quickly ramp up in a fast-paced environment and hit the ground running. Key Responsibilities:· Analyze, design, develop, and update software for new features, system enhancements, and performance improvements.· Write, maintain, and document high-quality C++ source code.· Develop solutions for complex technical problems affecting multiple systems and disciplines.· Implement and maintain communication interfaces using protocols such as TCP/IP, UDP, and DDS.· Work within the Linux operating system at an advanced level.· Support containerization and automated deployment using Docker and Kubernetes (RKE2).· Collaborate across engineering, operations, and integration teams to support software deployments.· Utilize software source control and configuration management tools.
2026-03-11T00:00:00Z

Full Stack Software Developer

Salt Lake City, UT
onsite
Temporary
58.9 - 68.2 USD / Hourly
We are looking for an experienced Full Stack Software Developer to join our client's team in Utah, and contribute to the development of modern, scalable applications for the financial services industry. This long-term contract position offers the opportunity to work on both front-end and back-end technologies, collaborating closely with a talented engineering team. If you thrive in a dynamic environment, and have a passion for delivering high-quality software solutions, we encourage you to apply. Responsibilities:• Design and implement robust front-end features using Angular and TypeScript to enhance user experiences.• Develop and maintain scalable back-end solutions utilizing Java and Spring Boot.• Collaborate with team members to deploy applications effectively on OpenShift or Kubernetes platforms.• Participate in the creation and optimization of CI/CD pipelines to streamline development processes.• Write clean, maintainable, and well-documented code to ensure long-term software quality.• Troubleshoot and resolve technical issues in both front-end and back-end systems.• Engage in regular code reviews to uphold best practices and improve team productivity.• Contribute to the development of cloud-native applications tailored to business needs.• Work closely with stakeholders to understand requirements and deliver solutions aligned with project goals.• Stay updated on emerging technologies and incorporate relevant advancements into the development process.
2026-03-12T00:00:00Z

Full Stack Developer

Miami, FL
onsite
Temporary
0 - 0 USD / Yearly
Our company is seeking a skilled Full Stack Developer to join a dynamic 5-member IT team supporting our largest travel-sector client. This role centers on developing and automating critical business systems, integrating third-party platforms, and improving operational workflows for travel agencies. The Full Stack Developer will work alongside software developers, network engineers, and a technical lead in a hybrid environment (partial onsite presence required in Miami Beach).Responsibilities:<ul><li>Rapidly learn and actively contribute to the development and extension of our homegrown automation system tailored for the travel sector.</li><li>Design, build, and optimize backend services using C# and .NET Core, including RESTful APIs and system integrations.</li><li>Develop modern frontend interfaces using JavaScript and frameworks such as React, Angular, or Vue.</li><li>Participate in creating and enhancing CI/CD pipelines, leveraging tools including Azure DevOps, GitHub Actions, and Jenkins to ensure fast, reliable delivery of software solutions.</li><li>Build and maintain custom integrations with third-party services (e.g., GDS platforms, payment gateways, CRM systems).</li><li>Collaborate closely with network engineers to ensure overall system reliability, security, and performance.</li><li>Develop and maintain internal and external reporting dashboards using Power BI for data visualization and analytics.</li><li>Contribute to process automation initiatives, extending and improving internal platforms focused on workflow automation.</li><li>Work as part of a multidisciplinary team to deliver scalable, high-quality solutions to travel agency customers.</li></ul>
2026-02-24T00:00:00Z

Full Stack Developer

Middleton, WI
remote
Temporary
45 - 52 USD / Hourly
We are seeking a Mid–Senior Level Full Stack Developer to support and maintain a suite of existing enterprise applications. This role will focus on stabilizing, upgrading, and maintaining legacy systems that are currently in “keep the lights on” mode.These applications will eventually be sunset, so the work will primarily involve maintenance, upgrades, and support of existing functionality rather than new product development or greenfield engineering.The ideal candidate is comfortable working within established systems, addressing technical debt, upgrades, and out-of-support components, and collaborating in an Agile environment.Key Responsibilities<ul><li>Maintain and support existing enterprise applications</li><li>Implement system upgrades and updates to ensure applications remain stable and secure</li><li>Address out-of-support technologies and compatibility changes</li><li>Troubleshoot and resolve issues in legacy application environments</li><li>Participate in Agile / SAFe ceremonies, including stand-ups, ticket management, and story refinement</li><li>Collaborate with development teams to ensure continuity of application functionality</li><li>Contribute primarily to back-end development, while still supporting full stack functionality as needed</li></ul>Required Qualifications<ul><li>Mid–Senior level developer experience (not a Lead or Architect role)</li><li>Strong experience with TypeScript</li><li>Strong experience with .NET (4.6 – current versions)</li><li>Experience working with legacy ASP.NET applications</li><li>Experience with Python (some flexibility; willingness to work in Python environments)</li><li>Experience working within Agile or SAFe frameworks</li><li>Ability to maintain and enhance legacy or enterprise systems</li></ul>Nice to Have<ul><li>Experience modernizing or supporting applications approaching end-of-life</li><li>Strong debugging and troubleshooting skills in complex environments</li><li>Experience working on backend-heavy workloads within full stack applications</li></ul>
2026-03-11T00:00:00Z

Full Stack Developer

McLean, VA
onsite
Temporary
59.91 - 68.24 USD / Hourly
We are currently seeking a contract Full Stack Developer with a matrix skill set to join our project-driven technology team. This is a unique opportunity to lend your expertise to exciting initiatives, contribute to automation and innovation, and collaborate with cross-functional groups. The ideal candidate is equally comfortable working on both the front-end and back-end, and enjoys a fast-paced environment where adaptability and clear communication are valued.Key Responsibilities:<ul><li>Design, develop, test, and deploy robust applications across the full technology stack.</li><li>Work closely with stakeholders to clarify requirements and deliver technical solutions in line with project goals.</li><li>Participate in continuous integration, automation workflows, and DevSecOps practices to ensure quality and security.</li><li>Apply skills in AI integration, machine learning, and enterprise software applications as needed.</li><li>Maintain and optimize cloud-based environments (such as Microsoft Azure).</li><li>Utilize modern tools such as Apache Kafka, Databricks, Power BI, Splunk, and Terraform.</li><li>Leverage problem-solving and critical-thinking skills to address project challenges.</li><li>Demonstrate adaptability and pursue continuous learning to keep up with the latest technologies.</li></ul>
2026-03-03T00:00:00Z

Full Stack Developer

Washington, DC
onsite
Temporary
60.9 - 69.39 USD / Hourly
We are currently seeking a contract Full Stack Developer with a matrix skill set to join our project-driven technology team. This is a unique opportunity to lend your expertise to exciting initiatives, contribute to automation and innovation, and collaborate with cross-functional groups. The ideal candidate is equally comfortable working on both the front-end and back-end, and enjoys a fast-paced environment where adaptability and clear communication are valued.Key Responsibilities:<ul><li>Design, develop, test, and deploy robust applications across the full technology stack.</li><li>Work closely with stakeholders to clarify requirements and deliver technical solutions in line with project goals.</li><li>Participate in continuous integration, automation workflows, and DevSecOps practices to ensure quality and security.</li><li>Apply skills in AI integration, machine learning, and enterprise software applications as needed.</li><li>Maintain and optimize cloud-based environments (such as Microsoft Azure).</li><li>Utilize modern tools such as Apache Kafka, Databricks, Power BI, Splunk, and Terraform.</li><li>Leverage problem-solving and critical-thinking skills to address project challenges.</li><li>Demonstrate adaptability and pursue continuous learning to keep up with the latest technologies.</li></ul>
2026-03-03T00:00:00Z

Full Stack Developer

Aurora, OR
remote
Temporary
70 - 80 USD / Hourly
Robert Half is seeking a Full-Stack Developer to support a manufacturing organization based in Oregon. This role blends hands-on day to day maintenance and direct collaboration with business stakeholders, focusing on designing, building, and maintaining secure, scalable, full-stack .NET applications using modern frameworks and best practices. Job Details Duration: 4 month contract with potential to extend or convert Location: 100% Remote - Must work PST timezone Schedule: Monday - Friday Core Business Hours (PST) Key Responsibilities<ul><li>Design, develop, test, and maintain full-stack applications using C#, modern .NET, and ASP.NET.</li><li>Build and consume RESTful APIs, ensuring proper security, versioning, pagination, and error handling.</li><li>Develop responsive front-end interfaces using JavaScript/TypeScript, HTML5, CSS3, and modern frameworks.</li><li>Build applications using Blazor (Server and/or WebAssembly) and Telerik UI components.</li><li>Design, develop, and maintain SQL Server databases, including T-SQL, stored procedures, indexing, and performance tuning.</li><li>Partner directly with business users to analyze requirements, recommend solutions, and translate needs into technical designs.</li><li>Document solutions clearly from both technical and end-user perspectives.</li><li>Apply SOLID principles, common design patterns, Git-based workflows, and Agile development practices.</li></ul>
2026-03-11T00:00:00Z

Full Stack Developer

Rockville, MD
onsite
Temporary
61.09 - 68.59 USD / Hourly
We are currently seeking a contract Full Stack Developer with a matrix skill set to join our project-driven technology team. This is a unique opportunity to lend your expertise to exciting initiatives, contribute to automation and innovation, and collaborate with cross-functional groups. The ideal candidate is equally comfortable working on both the front-end and back-end, and enjoys a fast-paced environment where adaptability and clear communication are valued.Key Responsibilities:<ul><li>Design, develop, test, and deploy robust applications across the full technology stack.</li><li>Work closely with stakeholders to clarify requirements and deliver technical solutions in line with project goals.</li><li>Participate in continuous integration, automation workflows, and DevSecOps practices to ensure quality and security.</li><li>Apply skills in AI integration, machine learning, and enterprise software applications as needed.</li><li>Maintain and optimize cloud-based environments (such as Microsoft Azure).</li><li>Utilize modern tools such as Apache Kafka, Databricks, Power BI, Splunk, and Terraform.</li><li>Leverage problem-solving and critical-thinking skills to address project challenges.</li><li>Demonstrate adaptability and pursue continuous learning to keep up with the latest technologies.</li></ul>
2026-03-03T00:00:00Z

Full Stack Developer

Chamblee, GA
onsite
Temporary
65 - 80 USD / Hourly
The Portal Solutions Architect is a highly visible, cross-functional leader who shapes how our customers experience our digital platforms. This role owns the end-to-end architecture and delivery of secure, scalable, customer-facing web portals that support enterprise reverse logistics — translating complex business and customer needs into elegant, durable technical solutions. Layman’s terms: You will be designing and customizing our client's client portal which allows for tracking of shipments to interact with our client's major automotive client. The environment is a Microsoft shop. Their current client portal is homebuilt on PHP. Major Duties and Responsibilities:<ul><li>Technical & Architectural Leadership: Own the architectural vision and technical direction for portal solutions built primarily on Microsoft cloud and business application technologies (Azure, Dynamics 365 CRM and Business Central), guiding internal and external development teams, reviewing designs, and ensuring best practices in security, scalability, and maintainability.</li><li>Solution Design & Prototyping: Lead the design of complex web applications and integrations, providing architectural guidance and hands-on support for proof-of-concepts and critical-path issues when needed.</li><li>Integration Oversight: Oversee integrations across web applications and enterprise platforms, including APIs, Azure services, identity and SSO (Entra ID, OAuth, SAML), CRM, ERP, and Power Platform solutions, ensuring secure, reliable, and loosely coupled system design.</li><li>Delivery Partnership & Risk Management: Collaborate with the PMO to support delivery timelines and execution, while maintaining ownership of technical dependencies, architectural decisions, and risk mitigation strategies.</li><li>Quality & Continuous Improvement: Partner with QA and internal teams to ensure high-quality delivery, participate in design and code reviews, and drive continuous improvement through retrospectives and process enhancements.</li></ul>
2026-02-17T00:00:00Z

Full Stack Developer

Baltimore, MD
onsite
Temporary
55.05 - 60.24 USD / Hourly
We are currently seeking a contract Full Stack Developer with a matrix skill set to join our project-driven technology team. This is a unique opportunity to lend your expertise to exciting initiatives, contribute to automation and innovation, and collaborate with cross-functional groups. The ideal candidate is equally comfortable working on both the front-end and back-end, and enjoys a fast-paced environment where adaptability and clear communication are valued.Key Responsibilities:<ul><li>Design, develop, test, and deploy robust applications across the full technology stack.</li><li>Work closely with stakeholders to clarify requirements and deliver technical solutions in line with project goals.</li><li>Participate in continuous integration, automation workflows, and DevSecOps practices to ensure quality and security.</li><li>Apply skills in AI integration, machine learning, and enterprise software applications as needed.</li><li>Maintain and optimize cloud-based environments (such as Microsoft Azure).</li><li>Utilize modern tools such as Apache Kafka, Databricks, Power BI, Splunk, and Terraform.</li><li>Leverage problem-solving and critical-thinking skills to address project challenges.</li><li>Demonstrate adaptability and pursue continuous learning to keep up with the latest technologies.</li></ul>
2026-03-03T00:00:00Z

Full Stack Engineer

Jacksonville, FL
onsite
Temporary
0 - 0 USD / Yearly
Join a product‑focused team building scalable web applications on Microsoft stack. You’ll ship features across the full stack using .NET/C# on the backend and React (or similar) on the frontend, deploy to Azure, and improve performance, reliability, and developer experience.What You’ll Do<ul><li>Build RESTful APIs, services, and backend components using .NET/C#</li><li>Develop modern frontends (React preferred) with clean, reusable components</li><li>Deploy and run apps on Azure (App Service, Functions, ACR/AKS, Storage, Key Vault)</li><li>Work with relational databases (SQL Server/Azure SQL), tuning and queries</li><li>Implement CI/CD (Azure DevOps/GitHub Actions), testing, and observability</li><li>Collaborate with Product/Design to deliver user‑centric features</li><li>Write clean, maintainable code and documentation</li></ul>
2026-02-27T00:00:00Z

Full Stack Engineer

New York, NY
onsite
Temporary
61.75 - 71.5 USD / Hourly
Must have skills: • 3–6 years of professional software engineering experience, with a strong portfolio of full stack development work. • Proficiency in Python, including experience with web frameworks such as Flask or Dash. • Experience integrating frontend applications with RESTful APIs and backend services. • Relational and non-relational databases: SQL, MongoDB, and/or Snowflake using Python. • Designing data models for effective data storage and retrieval (preferably SQL, MongoDB, Snowflake). • Debugging, issue resolution, and troubleshooting. • Developing systems integrated with cloud services, such as for storage or secrets management (preferably AWS). • Designing and troubleshooting ETL pipelines. • Developing REST APIs using Python frameworks (preferably Flask). • Publishing Python packages, maintaining them, and building Python CLI tools. • Deploying REST APIs in containerized environments (Kubernetes), working with other developers in the team to integrate those APIs with web applications. Nice to have skills: • Exposure to financial systems, SEC API, and/or corporate credit modeling is strongly preferred. • Familiarity with UX design tools (Figma) and solid understanding of the design-engineering hand-off process • Familiarity with deployment pipelines, CICD tools (preferably GitLab). • Configuring observability and alerting services (preferably Datadog and Opsgenie). • Containerized development and deployment (i.e. Docker, Kubernetes) • Writing infrastructure as code (preferably Terraform). • Integrating managed authentication services (preferably Auth0). • Familiarity with LLM Document Parsing and Data Framework services (preferably LlamaParse and LlamaIndex) • Familiarity with LLM Observability tooling (preferably Weave) • Experience with the OpenAI SDK • Experience with Vector Databases (preferably MongoDB)
2026-02-18T00:00:00Z

Full Stack | C# .NET Engineer

Ankeny, IA
onsite
Contract / Temporary to Hire
0 - 0 USD / Yearly
We are looking for a skilled Full Stack C# .NET Engineer to join our team on a contract with the potential for a permanent position. Based in Ankeny, Iowa, this role is ideal for professionals with a strong focus on backend development and a passion for building robust API services and system integrations. The first year of this position will focus heavily on backend development, offering an excellent opportunity to deepen your expertise in Azure Cloud and SQL Server environments. Responsibilities: • Design and develop backend services and APIs using C# to support system integrations and data validation. • Build and maintain secure connections to SQL Server databases, including creating tables, indexes, views, and running complex queries. • Implement and manage Azure pipelines for efficient deployment processes. • Collaborate on containerization strategies to improve scalability and application performance. • Utilize GitHub for code repository management, ensuring version control and collaboration. • Work on Azure Service Bus and Azure API Management to optimize cloud-based integrations. • Conduct thorough testing and validation of APIs to ensure reliability and functionality. • Participate in full stack development, with an eventual focus on front-end technologies. • Provide technical solutions for integrating various systems and databases. • Create detailed documentation for development processes and system configurations.
2026-03-09T00:00:00Z

.NET Full Stack Developer

Atlanta, GA
onsite
Permanent
90000 - 125000 USD / Yearly
We are seeking a skilled Mid-Level .NET Full Stack Developer to join our technology team in the Metro Atlanta area. This role is ideal for a developer who enjoys working across the full application stack and contributing to scalable, high-performing enterprise applications. You will collaborate with cross-functional teams to design, develop, and enhance business-critical solutions in a fast-paced environment. Key Responsibilities Develop and maintain web applications using C#, .NET Core, and ASP.NET Build and enhance RESTful APIs and backend services Design and implement responsive front-end interfaces using Angular, React, or modern JavaScript frameworks Write efficient SQL queries and support database design (SQL Server) Participate in system architecture discussions and technical solutioning Perform code reviews and ensure adherence to development standards Troubleshoot, debug, and resolve production issues Contribute to CI/CD processes and DevOps best practices Support application modernization and cloud migration initiatives
2026-02-20T00:00:00Z