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Jobs · Engineering · Washington

Sr Engineer, Software - EPM Platform

T-Mobile · Bellevue, WA · 2 mo ago
EngineeringFull-time

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures employees receive competitive compensation and wealth-building opportunities, including an annual stock grant, employee stock purchase plan, 401(k), and free year-round money coaching.

About the role

This role is responsible for designing, building, and supporting scalable OneStream planning solutions that enable enterprise financial planning and forecasting capabilities for our FP&A Business Partners. The Senior Engineer will work closely with FP&A, Data, and our EPM Platform Engineering teams to build and expand connected planning solutions using OneStream and related technologies. This is a hands-on engineering role focused on solution development, planning platform expansion, and modernization initiatives. The ideal candidate brings strong EPM Platform implementation experience, FP&A domain knowledge, and the ability to translate business requirements into scalable technical solutions. You'll be expected to drive design decisions, not just implement them.

Responsibilities

  • Planning Solution Engineering
    • Design, develop, and enhance OneStream Planning solutions supporting enterprise planning models across revenue, customers, capex, workforce, and other planning domains.
    • Lead end-to-end solution design from requirements through deployment, including technical documentation and peer review.
    • Build scalable planning applications supporting forecasting, workforce planning, and connected planning capabilities.
    • Develop driver-based planning models, scenario analysis, and rolling forecast capabilities.
    • Translate FP&A business requirements into scalable, enterprise-grade OneStream planning solutions.
  • Development & Platform Engineering
    • Develop and maintain Business Rules and calculations using VB.NET/C# scripting and native OneStream capabilities.
    • Build and maintain Cube Views, Dashboards, and Data Entry Forms, Extensible Dimensionality (XD), routines to support planning workflows.
    • Build and maintain Workflow profiles, Task Groups, and Workflow Steps to orchestrate the end-to-end planning process including input, review, and approval cycles.
    • Implement error handling, logging, and diagnostic routines within Business Rules using OneStream's Logging API and BRUtils methods.
    • Support application performance optimization, cube tuning, metadata management, security, and usability improvements.
    • Contribute to scalable application design, reusable components, and engineering best practices.
    • Participate in new capability development and platform expansion initiatives.
  • Integrations & Data Management
    • Design and support integrations using OneStream Data Management Rules, Data Integration connectors, and related integration frameworks.
    • Configure Data Integration connectors (File-based, JDBC, REST API, Boomi) to load Actuals, master data, and reference data from various ERP and HR systems such as SAP, Oracle, Workday, and Salesforce.
    • Support master data synchronization workflows including automated dimension member updates, hierarchy refreshes, and member attribute maintenance.
    • Partner with Data and FP&A teams to improve data quality, reconciliation, and planning workflows.
  • Collaboration & Delivery
    • Collaborate with global engineering teams, FP&A stakeholders, and cross-functional partners to deliver high-quality planning solutions.
    • Support Agile delivery practices and continuous improvement initiatives.
    • Present trade-off analyses to non-technical finance leaders.
    • Mentor team members through technical guidance and knowledge sharing.
    • Create and maintain technical documentation, system designs, and operational procedures.
    • Contribute to broader platform strategy as the team scales.

Requirements

  • 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 the field.
  • 4-7 years of technical engineering experience (Required).

Qualifications

  • Preferred:
    • Software engineering or EPM Platform experience (OneStream).
    • Planning experience, including Business Rules development, Cube Views, Dashboards, and Data Management.
    • Proven experience owning end-to-end solution design for enterprise EPM implementations.
    • Strong analytical, problem-solving, and communication skills.
    • Ability to facilitate requirements workshops with FP&A stakeholders and translate outputs into technical design documents.
    • Experience with OneStream MarketPlace solutions (e.g., Specialty Planning, Reporting Packages, Workforce Planning).
    • Experience with workforce planning, long-range planning, or connected planning initiatives.
    • Familiarity with OneStream AI/ML capabilities or exposure to AI-assisted planning workflows and GenAI tools supporting productivity.
    • OneStream certification or formal OneStream training.
    • Familiarity with Agile/DevOps and CI/CD practices applied to EPM platform development.
    • Prior experience with Oracle EPBCS, SAP BPC, or Anaplan as a point of comparison/migration context.
    • Exposure to financial consolidation workflows including intercompany eliminations, currency translation, and minority interest.
    • 1+ year experience with Oracle EPBCS suite of products.
  • Knowledge, Skills, and Abilities:
    • Analytical Thinking
    • Analytics
    • Collaboration
    • Communication
    • Customer Service
    • Mentorship
    • Programming Languages
    • Software Design
    • Software Development
    • System Integration
    • Technical Writing
  • Legally authorized to work in the United States.
  • At least 18 years of age.
  • Travel required: Yes.

Pay

Base pay range: $113,600 - $205,000. The successful candidate’s actual pay will be based on work location, qualifications, and experience. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance, set at a percentage of the employee’s eligible earnings in the prior year (e.g., 15% target for this role).

To find the pay range for this role based on hiring location, visit: T-Mobile Pay Lookup.

Benefits

Full and part-time employees have access to the same benefits when eligible, including:

  • Medical, dental, and vision insurance.
  • Flexible spending account.
  • 401(k) with company match.
  • Employee stock grants and employee stock purchase plan.
  • Paid time off (about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually) plus up to 12 paid holidays.
  • Paid parental and family leave.
  • Family building benefits, back-up care, enhanced family support, and childcare subsidy.
  • Tuition assistance and college coaching.
  • Short- and long-term disability.
  • Voluntary AD&D, accident, life, disability, and long-term care insurance.
  • Mobile service and home internet discounts.
  • Pet insurance.
  • Commuter and transit programs.

Learn more about T-Mobile’s benefits at www.t-mobilebenefits.com.

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