Staff Software Engineer

Sustainment; Austin (TX); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Medical, dental, vision

Paid time off

Company holidays

401K matching

Job summary

Sustainment seeks a Staff Software Engineer to set technical direction and ship fast. You will be a hands-on contributor with Tech Lead responsibility, owning hard architectural decisions, writing production code, and making the team faster and better as we scale.

You will lead architecture for ABP-based applications, ship high-quality full-stack features, mentor engineers, and ensure secure-by-design systems across AWS GovCloud environments.

Qualifications

• 8+ years of professional software engineering with architecture ownership.
• 5+ years building production systems in C# and ASP.NET Core.
• Strong EF Core and PostgreSQL experience including indexing and concurrency.
• Production experience with ABP Framework or equivalent patterns.
• Experience with Angular and TypeScript for end-to-end features.
• Ability to obtain and maintain a US government security clearance (US citizenship may be required).
• Experience with AWS, containers, and CI/CD.

Responsibilities

• Lead technical design for major features and own the architecture of ABP-based applications.
• Ship production full-stack code to a high standard, tackling the hardest problems.
• Own the quality end-to-end of the systems you build.
• Raise engineering standards through code review, design review, and direct mentoring.
• Set the team's .NET standards and enforce them in code reviews and CI.
• Build secure-by-design systems, including for AWS GovCloud and government environments.
• Own reliability, performance, and observability; fix root causes of failures.
• Evaluate tools and frameworks and make informed calls.
• Plan and lead .NET and ABP major-version upgrades across services.
• Translate customer and business needs into clear technical priorities with leadership.
• Document decisions so the team can execute without you present.

Skills

Architecture ownership

Full-stack development

C# / ASP.NET Core

EF Core / PostgreSQL

ABP Framework

Performance tuning

Angular / TypeScript

AWS / Cloud

CI/CD

Secure coding

Clear communication

Security clearance eligibility

Tools

ABP Framework

Datadog APM

dotnet-trace

dotnet-counters

Job description

Company Overview: Sustainment is an AI-native software platform that helps US-based manufacturers easily find and work with the critical suppliers they need to build and manage their supply chains. Our vision is to reimagine American manufacturing as a hyperconnected, secure, and resilient ecosystem of local and regional suppliers who can more easily connect, interact, and do business with the industry and government customers that rely on them. We are a dual-use technology platform that supports both DoD and commercial customers in pursuit of our vision.

ROLE OVERVIEW

We need a Staff Software Engineer to set technical direction and ship fast. You are a hands-on individual contributor with Tech Lead responsibility. You own the hard architectural calls, write production code, and make the engineers around you faster and better. We are scaling. Your job is to help us grow without breaking what works.

RESPONSIBILITIES

• Lead technical design for major features and own the architecture of our ABP-based applications: module boundaries, shared libraries, and the conventions other teams build on.
• Ship production full-stack code at a high standard, including the hardest and most ambiguous problems.
• Own the quality end-to-end
• Raise engineering standards through code review, design review, and direct mentoring.
• Set the team's .NET standards and enforce them in code review and CI.
• Build secure-by-design systems, including for AWS GovCloud and government customer environments.
• Own reliability, performance, and observability of what you ship. Own failures and fix root causes.
• Evaluate tools, frameworks, and methods, and make the call.
• Plan and lead .NET and ABP major-version upgrades across our services while feature work continues.
• Translate customer and business needs into clear technical priorities with the Director of Engineering and Product.
• Document decisions so the team can execute without you in the room.

QUALIFICATIONS

• 8+ years of professional software engineering, including multiple years owning architecture of production systems.
• Proven record of leading technical delivery across a team without formal authority.
• 5+ years building production systems in C# and ASP.NET Core. You know the request pipeline, dependency injection lifetimes, and async behavior well enough to debug them under load.
• Strong EF Core and PostgreSQL experience: migration strategy across environments, query plans, indexing, and concurrency control.
• Production experience with ABP Framework is strongly preferred. Deep experience with the same patterns in another .NET framework is a reasonable substitute if you can learn ABP quickly.
• You have found and fixed .NET performance problems in production with tools like dotnet-trace, dotnet-counters, or Datadog APM.
• Working proficiency in Angular and TypeScript, enough to ship features end to end.
• Experience with distributed systems, cloud infrastructure (AWS), containers, and CI/CD.
• Secure coding discipline and experience in regulated or high-assurance environments.
• Clear written and verbal communication. You can brief engineers and executives.
• Ability to obtain and maintain a US government security clearance. Certain programs may require US citizenship.
• Early-stage startup or SaaS experience is a plus.

OUR STACK

Sustainment offers a competitive benefits package for full time employees including medical, dental, vision, paid time off, company holidays, and 401K matching.

Sustainment is proud to be an equal opportunity employer. We provide employment opportunities without regard to age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, veteran status, or any other protected class.

Applicants must be authorized to work for ANY employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time.