Principal Software Engineer - Tax Technology

T-Mobile

Quick summary

Work type: On-site
Location: Bellevue, WA
Salary: $133,500–$240,700 / yr
Posted: 6 days ago
Nearby: 99+ roles within 25 mi

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $188k

This role $187k

$121k most similar roles pay here $254k

This role pays more than 51% of similar roles. Most pay $161,500–$214,750 — the shaded band above. At the midpoint, this role pays about $187k versus about $188k for comparable roles.

Based on 239 similar postings.

Employer

About T-Mobile

T-Mobile US is the second-largest wireless carrier in the United States, providing wireless voice, messaging, and data services under the T-Mobile and Metro by T-Mobile brands. Industry: Wireless Telecommunications

T-Mobile currently has 25 open roles on FindRole.

Listed pay typically runs $109,500–$188,250 across 24 roles with salary data.

Most-posted roles

View all roles at T-Mobile

At a glance

TL;DR · Principal Software Engineer - Tax Technology

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The Principal Software Engineer - Tax Technology is a senior role within T-Mobile’s engineering team, focusing on driving software engineering execution across tax technology platforms. This position involves collaborating with cross-functional teams to develop scalable and secure solutions for tax calculation, compliance, reporting, and enterprise integrations. Day-to-day responsibilities include mentoring engineers, influencing technical decisions, and designing backend services, APIs, and integration layers using technologies like .NET Core, Angular, AWS RDS, and containerization tools. The role also emphasizes promoting modern software practices such as CI/CD, observability, and cloud-native deployments to ensure high performance and reliability of tax workflows. Ideal candidates have experience in complex enterprise environments, indirect tax platforms, and integrating financial systems with ERP solutions.

Skills

AWS Azure Oracle Cloud .NET Core .NET Angular SQL Server API development CI/CD Docker Kubernetes Terraform Prometheus Grafana AI-assisted engineering tools DevOps Cloud-native deployments Hybrid cloud environments Enterprise data integration Vertex O-Series Vertex Edge

What you'll do

Drive engineering projects to deliver high-quality software solutions meeting technical requirements.
Mentor engineers and influence technology decisions across the organization.
Develop innovative software designs that improve existing tax systems and processes.
Lead technical execution for Tax Technology initiatives supporting complex business workflows.
Evaluate new technologies and recommend practical applications aligned with enterprise standards.

What we're looking for

7-10 years of technical engineering experience in complex enterprise environments.
Proven ability to mentor engineers and influence technical direction across teams.
Experience with cloud-native deployments and hybrid cloud architectures.
Strong background in API development, CI/CD pipelines, and automated testing.
Expertise in integrating enterprise platforms such as ERP systems and financial tools.
Demonstrated success in leading software engineering projects from design to deployment.
Ability to evaluate and recommend AI-assisted engineering tools for business use.

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