The Senior Software Engineer will support and enhance the Enterprise Procurement Platform, designing, implementing, and deploying scalable software solutions that keep the platform stable, secure, and ready for future-state capabilities. Working closely with business stakeholders, engineers, and technologies such as virtualization, microservices, software-defined networking, network functions virtualization, and big data, this person exercises independent judgment to resolve technical issues, recommend sound software design, and ensure continuous, compliant, and scalable procurement operations. Success is measured by the ability to deliver effective solutions that integrate cleanly with system protocols and meet business and technical requirements, improving operational efficiency and the customer experience. We pride ourselves on encouraging a culture of innovation, advocating for agile methodologies, and promoting transparency in all that we do. Join us in embodying the spirit of the 'Un-carrier' and make a tangible impact! If you're up to the challenge, apply today! Job Responsibilities: - Develop software solutions and conduct tests to drive engineering projects and ensure quality deliverables - Contribute to design innovations that improve systems, processes, or services using new frameworks and industry best practices - Collaborate with technical teams to deliver solutions and mentor others through knowledge sharing and training sessions - Support technology strategy by evaluating and applying current technologies that align with business goals - Create clear documentation for software code, system designs, and business requirements to support knowledge sharing - Evaluate, integrate, and maintain AI/ML capabilities - including LLM APIs, local model deployments, RAG pipelines, and MCP server integrations - to enhance platform intelligence and automation across procurement and supply chain workflows - Experience designing and deploying AI agent workflows - including multi-step tool-use agents, LLM-powered diagnostic agents, and agentic orchestration using LangChain / LangGraph or cloud-native frameworks (AWS Bedrock Agents) - integrated into enterprise microservices - Apply AI-assisted development practices and contribute to responsible AI standards, including prompt engineering, output validation, and guardrails aligned with enterprise security and compliance requirements - Also responsible for other duties/projects as assigned by business management as needed - Provide day-to-day BAU (Business-as-Usual) support for the Enterprise Procurement / STP platform - Execute and support application deployments, configuration changes, and production support activities - Support SAP Ariba administration, including user access management and operational configurations - Develop and support integrations, APIs, and platform enhancements as required - Assist in change request (CR) execution, defect resolution, and release readiness - Partner with TPMs and SOX Control Operators to ensure secure, compliant operations - Contribute to process improvements, documentation, and operational runbooks - Participate in offshore/onshore collaboration with defined overlap hours Education and Work Experience: - 4-7+ years - Technical engineering experience using the .NET stack (ASP.NET Core / ASP.NET MVC / ASP.NET Web API / C#), front-end frameworks (e.g., Angular, Razor Pages or Blazor), Oracle SQL / MS SQL, Kubernetes, and API Gateway technologies - Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience (Required) - Acceptable areas of study include Computer Science, Software Engineering, Information Management or equivalent experience in field (Required) - Strong experience with Kubernetes, C#/.NET Core, Python, SQL, Splunk, Java-Spring Boot and Grafana. - Deep expertise in microservices architecture and distributed systems. - Hands-on experience with AI/ML integration patterns - including LLM APIs (OpenAI, Azure OpenAI, Anthropic), RAG pipelines, vector databases, and MCP server development - applied within .NET or Python backend systems - Experience building production AI agents using LangChain, LangGraph, or AWS Bedrock Agents, including tool-use design, stateful multi-step reasoning, and integration with enterprise APIs and ERP workflows - Familiarity with local model operations (Ollama, vLLM, fine-tuning with LoRA/QLoRA) and AI-augmented development practices including prompt engineering, output validation, and responsible AI guardrails in enterprise environments - Hands-on experience with CI/CD pipelines (GitLab/GitHub), observability, and operational tooling. Required Knowledge, Skills and Abilities: - Strong hands-on experience in software engineering, platform support, or enterprise application development - Experience with procurement platforms, or ERP-adjacent systems - API development and integration experience using Java and Python - Experience supporting enterprise SaaS platforms or large-scale systems - Working knowledge of AI/ML integration patterns - LLM APIs, RAG pipelines, vector databases, and MCP server connectivity - within enterprise .NET or Python environments - AI agent design and orchestration (LangChain, LangGraph, AWS Bedrock Agents, or equivalent frameworks) - Familiarity with AI-assisted development tooling (GitHub Copilot, Cursor, or similar) and responsible AI practices including prompt engineering, output validation, and compliance-aware guardrails - Solid understanding of production support, deployments, and operational ownership - Analytical Thinking, Analytics - Collaboration, Communication, Customer Service, Mentorship - Programming Languages, Software Design, Software Development, System Integration, Technical Writing - At least 18 years of age - Legally authorized to work in the United States Travel: Travel Required (Yes/No): Yes DOT Regulated: DOT Regulated Position (Yes/No): No Safety Sensitive Position (Yes/No): No Base Pay Range: $113,600 - $205,000 Corporate Bonus Target: 15% The pay range above is the general base pay range for a successful candidate in the role. The successful candidate's actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee's eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, https://paylookup.t-mobile.com/paylookup?reqID=REQ358180¶dox=1 At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile's amazing benefits, check out www.t-mobilebenefits.com. Never stop growing! As part of the T-Mobile team, you know the Un-carrier doesn't have a corporate ladder-it's more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it's that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you're living our values while investing in your career growth-and we applaud it. You're unstoppable!