Freelance Manual Software Testing Jobs in Rosenberg, TX

An exciting career awaits you At MPC, we’re committed to being a great place to work – one that welcomes new ideas, encourages diverse perspectives, develops our people, and fosters a collaborative team environment.

Join a team at the forefront of transforming how maintenance and operational excellence are delivered across the enterprise. As a Senior Software Engineer, you will play a key role in advancing a high-visibility digital transformation program focused on standardizing and modernizing the end-to‑end maintenance lifecycle through a unified, data-driven platform. In this role, you will design and build enterprise-scale solutions using the Microsoft Power Platform and Azure cloud technologies, enabling intelligent workflows, real‑time data capture, and seamless system integrations. Your work will directly influence how maintenance activities are planned, executed, and optimized, helping eliminate manual processes, improve operational efficiency, and create a foundation for future innovation in AI, automation, and advanced analytics. Beyond hands‑on engineering, you will serve as a technical leader within the Product Engineering Operations organization, partnering with business leaders, architects, and cross‑functional teams to deliver secure, scalable, and maintainable solutions that drive measurable business outcomes. You will help shape development standards, mentor fellow engineers, and champion modern software engineering practices across Power Platform, cloud architecture, DevSecOps, and application lifecycle management. This is an exceptional opportunity for an engineer who is passionate about solving complex business challenges, influencing enterprise‑wide transformation, and delivering technology solutions that create lasting impact. If you are energized by leading large-scale modernization efforts, extending platform capabilities through custom development and Azure services, and helping shape the future of digital operations, this role offers both the challenge and visibility to make a meaningful difference. This position belongs to a family of jobs with increasing responsibility, competency, and skill level. Actual position title and pay grade will be based on the selected candidate’s experience and qualifications.

Leads efforts from end‑to‑end through delegation, review, and driving results holistically; leads medium complexity features from technical design through completion. Executes a defined software engineering roadmap, contributing to the organization’s engineering and technology strategy. Performs coding, debugging, testing and troubleshooting throughout the development process in projects with moderate to high complexity under limited or no supervision. Identifies and recommends improvements to the software development lifecycle and best practices in agile engineering. Conducts demos of application features and designs features to support automated testability. Conducts research, design and prototyping and experience on a cross‑functional team. Works with users to translate designs and solution architecture into design specifications. Organizes the delivery of high‑quality, innovative solution or deliverables, setting effort estimates and continuously collaborating and updating the specifications, in line with user requirements. Coordinates and implements new architectures, standards, methods and logic for enterprise software in accordance with business strategies and specifications. Ensures proper documentation of software design and works with business partners to design and implement solution to meet architecture standards. Champions a continuous improvement mindset, usage of AI, and automation of software engineering processes. Drives process excellence and innovative Software Engineering by empowering others, collaborating, taking appropriate risks, and making timely decisions within scope of responsibility. Mentors less experienced team members and accelerates software engineering maturity by modeling and encouraging ongoing learning and self‑development.

Bachelor’s Degree in Information Technology, related field, or equivalent experience required 5+ years of relevant IT experience Experience designing, developing, and supporting solutions using Microsoft Power Platform technologies, including Power Apps (Canvas and Model‑Driven Apps), Power Automate, and Dataverse. Experience developing and supporting enterprise integrations using REST APIs, custom connectors, Azure services, Microsoft integration technologies, and modern application integration patterns. Proficiency in JavaScript, TypeScript, C#, .NET, JSON, and related technologies used to extend Power Platform capabilities, including PCF controls, custom APIs, and Dataverse plug‑ins. Strong understanding of agile methodologies, modern software delivery practices, including application lifecycle management (ALM), source control, CI/CD pipelines, deployment automation, and DevSecOps principles. Strong understanding of Power Platform security, authentication, authorization, and secure application development practices. Experience troubleshooting and resolving application, integration, performance, scalability, and operational issues in enterprise environments. Strong analytical, problem‑solving, communication, and stakeholder management skills. Power Platform Developer Associate (PL‑400) and/or Azure Developer Associate (AZ‑204) certifications are highly desirable.

• Agile Methodologies – Agile project management is an iterative approach to delivering a project throughout its life cycle, taking incremental steps towards the completion of a project.
• Application Security – Refers to the measures and practices implemented to protect software applications from security threats and vulnerabilities.
• Cloud Computing – Knowing how to manage cloud services, develop cloud applications and use cloud architecture to meet customer needs.
• Continuous Improvement – Identifies and leads opportunities for continuous improvement and value creation, both incremental and large‑scale.
• Debugging – The process of finding and resolving bugs within computer programs, software, or systems.
• DevSecOps – A set of practices that automates the integration of security at every phase of the software development lifecycle, from initial design through integration, testing, deployment, and software delivery, with an aim towards shortening the systems development life cycle and pas well as continuous delivery and a security first approach.
• General Programming – Applies a computer language to communicate with computers using a set of instructions and to automate the execution of tasks.
• Log Monitoring – Logging and monitoring are crucial aspects of software development that involve capturing and analyzing information about a software system's behavior, performance, and errors.
• Software Development Lifecycle (SDLC) – A process used by the software industry to design, develop and test high quality softwares.
• Software Testing – An investigation conducted to provide stakeholders with information about the quality of the software product or service under test.
• Version Control System – Software tool that helps engineers and other collaborators manage changes to source code, documents, and other files over time.

Bachelor’s Degree in Information Technology, related field or equivalent experience. 5+ years of relevant experience

Houston, Texas

Job Requisition ID: 00023291 Pay Min/Max: $106,900.00 - $184,300.00 Salary Grade: 11 - 12 Location Address: 500 Dallas St Ste 2900 Additional locations: Findlay, Ohio, San Antonio, Texas

Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision‑making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws.

If you would like more information about your EEO rights as an applicant, click here.

If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at talentacquisition@marathonpetroleum.com. Please specify the reasonable accommodation you are requesting, along with the job posting number in which you may be interested. A Human Resources representative will review your request and contact you to discuss a reasonable accommodation.

The hired candidate will also be eligible for a discretionary company-sponsored annual bonus program.

Equal Opportunity Employer: Veteran / Disability We will consider all qualified Applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws.

About Marathon Petroleum Corporation Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets. MPC also owns the general partner and majority limited partner interest in MPLX LP, a midstream company that owns and operates gathering, processing, and fractionation assets, as well as crude oil and light product transportation and logistics infrastructure.