Sr Software Engineer - Tax Technology

T-Mobile US • Overland Park, KS

76d • $113,600 - $205,000

About The Position

The Sr Software Engineer works with a team of other software engineers, network and systems engineers to compose, implement, and deploy software which meet customer requirements, scales easily, removes the limitations of traditional solutions, and supports deployment in highly available environments. The Sr Software Engineer actively participates in architecture and design of various software components focused on crafting applications that leverage microservices, cloud-native platforms, and automation. They work on assignments requiring considerable judgment and initiative, understand implications of work, and make recommendations for solutions. This role is the first in-house engineering position on the IT Tax Technology team, responsible for establishing a build-focused engineering practice, driving in-house technical expertise and shaping the future of our tax technology architecture. This is a hands-on leadership role requiring technical excellence, platform expertise, and cross-functional collaboration.

Requirements

• Bachelor's Degree in Computer Science or Engineering.
• 4-7 years of technical engineering experience.
• Strong proficiency with .NET Core/6/7 backend development and Angular front-end frameworks.
• Exceptional communication skills, with the ability to clearly explain technical concepts to non-technical partners.
• Strong ownership and accountability, with a track record of driving projects independently to completion.
• Ability to thrive in ambiguous environments, creating clarity and structure where none exists.

Nice To Haves

• Familiarity with Vertex O-Series or Vertex Edge indirect tax engines.
• Background in the telecommunications industry, especially billing systems and telecom taxation.
• Experience designing and implementing orchestration layers for complex business workflows.
• Familiarity with rules engines or policy-driven logic frameworks.
• Experience in applying AI/ML to enhance workflow automation, monitoring, and performance optimization.
• Prior experience in small, high-impact teams or as an early hire in a new function.

Responsibilities

• Drive engineering projects by developing software solutions, conducting tests and inspections, and preparing reports.
• Understand system protocols, how systems operate and data flows.
• Independently develop a full software stack.
• Interact with system engineers to define system requirements and/or vital requirements for automation.
• Design, build, and support backend services using .NET (Core/6/7) and frontend UI components in Angular.
• Develop and maintain SQL Server (AWS RDS) databases supporting tax applications.
• Build orchestration layers for tax workflows to handle integration across billing systems, ERP, exemption services and tax engines.
• Implement and handle cloud-native and hybrid deployments across on-premise environments, AWS, Azure, and Oracle Cloud using Kubernetes/Conductor, Docker, and GitLab CI/CD pipelines.
• Contribute to designs that apply new frameworks to improve systems and processes.
• Evaluate current-state tax technology ecosystem and help define target-state tax architecture.
• Explore opportunities to apply AI/ML techniques to optimize tax workflow orchestration, anomaly detection, and process automation.
• Collaborate with technical teams and utilize system expertise to deliver technical solutions.
• Continuously learn and teach others existing and new technologies.
• Act as a founding engineer for Tax Technology, setting coding standards and engineering practices for future hires.
• Contribute to new and existing technology options that support business goals.
• Ensure tax platform design aligns with enterprise multi-cloud strategy, DevOps practices, security standards, and long-term scalability.
• Write basic documentation on how technology works.
• Create clear documentation for new code and systems.
• Document systems designs, presentations, and business requirements for consumption and consideration at the manager level.
• Create technical documentation for tax workflow orchestration, APIs, and custom enhancements to support maintainability and audit compliance.

Benefits

• Medical, dental and vision insurance.
• Flexible spending account.
• 401(k) with company match.
• Employee stock grants and employee stock purchase plan.
• Paid time off and up to 12 paid holidays.
• Paid parental and family leave.
• Family building benefits.
• Back-up care and enhanced family support.
• Childcare subsidy.
• Tuition assistance and college coaching.
• Short- and long-term disability insurance.
• Voluntary AD&D coverage, accident coverage, life insurance, disability insurance, and long-term care insurance.
• Mobile service & home internet discounts.
• Access to commuter and transit programs.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Industry: Telecommunications
• Education Level: Bachelor's degree