Principal Software Engineer

TEKsystems; Irvine (CA); On-site; USD 170,000 - 233,000; Full time

Benefits offered by this job

Tuition reimbursement

Comprehensive benefits (Medical/Dental

Vision

Wellness program

Generous paid time off

Job summary

TEKsystems seeks a Principal Software Engineer to lead design and modernization of large-scale enterprise applications, championing AI-assisted and agentic software engineering. This hands-on technical leadership role focuses on solving complex architectures, building cloud-based solutions, and guiding delivery across teams.

You will design APIs and distributed systems, mentor engineers, and collaborate with DevOps, security, and platform teams to raise engineering standards and drive

Qualifications

• 10+ years of software engineering experience.
• Deep expertise in C#/.NET.
• Strong experience with SQL Server and T-SQL.
• Experience designing APIs, integrations, and distributed systems.
• Strong Azure cloud experience.
• Knowledge of messaging, caching, resiliency, concurrency, and asynchronous processing.
• Software architecture and design pattern expertise.
• Experience with AI coding assistants, agentic development platforms, or AI-enabled engineering practices.

Responsibilities

• Design and build enterprise applications, APIs, integrations, and distributed systems.
• Lead development using C#, .NET, SQL Server, Azure, and modern web technologies.
• Drive modernization of legacy applications and platforms.
• Define engineering standards, architectural patterns, and best practices.
• Partner with engineering, DevOps, security, and platform teams.
• Leverage AI coding assistants and agentic development tools to improve software delivery.
• Mentor engineers and provide technical leadership across multiple teams.

Skills

10+ years experience

C#/.NET

SQL Server

Azure

APIs

Distributed systems

AI coding assistants

Agentic development

Job description

Principal Software Engineer

Location: Plano, TX or Irvine, CA (Onsite)

Type: Full-Time W2

We're looking for a Principal Software Engineer to lead the design and modernization of large-scale enterprise applications while helping drive the adoption of AI-assisted and agentic software engineering.This is a hands‑on technical leadership role for someone who enjoys solving complex architectural challenges, building modern cloud‑based solutions, and influencing how software is delivered across an organization.

What You'll Do

• Design and build enterprise applications, APIs, integrations, and distributed systems
• Lead development using C#, .NET, SQL Server, Azure, and modern web technologies
• Drive modernization of legacy applications and platforms
• Define engineering standards, architectural patterns, and best practices
• Partner with engineering, DevOps, security, and platform teams
• Leverage AI coding assistants and agentic development tools to improve software delivery
• Mentor engineers and provide technical leadership across multiple teams

What We're Looking For

• 10+ years of software engineering experience
• Deep expertise in C#/.NET
• Strong experience with SQL Server and T-SQL
• Experience designing APIs, integrations, and distributed systems
• Strong Azure cloud experience
• Knowledge of messaging, caching, resiliency, concurrency, and asynchronous processing
• Software architecture and design pattern expertise
• Experience with AI coding assistants, agentic development platforms, or AI-enabled engineering practices

Nice to Have

• Python, JavaScript, or TypeScript experience
• Experience modernizing large-scale enterprise applications
• Prior experience as a Principal Engineer, Staff Engineer, or Architect
• Experience in a regulated industry

Pay and Benefits

The pay range for this position is $170000.00 - $233000.00/yr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Extensive internal growth and professional development opportunities including tuition reimbursement. Comprehensive benefits package including Medical/Dental/Vision. Wellness program to support both mental and physical health. Generous paid time off options to support work-life balance.

Job Type & Location

This is a Permanent position based out of Irvine, CA.

Workplace Type

This is a fully onsite position in Irvine,CA.

Application Deadline

This position is anticipated to close on Nov 6, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

Were a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. Were a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. Were strategic thinkers, hands‑on collaborators, helping customers capitalize on change and master the momentum of technology. Were building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI)

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.