Principal Sales Engineer

ECS Tech Inc • Arlington, VA

5d • Onsite

About The Position

ECS is seeking a Principal Sales Engineer
to work in our Arlington, VA office.

We are looking for a Principal Sales Engineer who builds. This is a hands-on,
player-coach role at the intersection of pre-sales strategy and solution
delivery. You will work directly with new prospects and existing customers to
understand their technical challenges, plan engagement approaches, and then roll
up your sleeves to design and develop the solutions that win deals and deepen
relationships.

The right candidate is equally comfortable leading a whiteboard session with a
CTO, writing production-quality prototype code, and planning a multi-phase
technical engagement. You bring deep engineering fluency across cloud
infrastructure, modern software development, and AI/ML—and you know how to
translate that into outcomes that customers can see and touch. You are looking
for a role where you
are
hands on; you want to be in the code, in the
architecture, and in the room when it matters.

Requirements

• 12+ years of progressive experience in sales engineering, solutions architecture, or a comparable customer-facing technical role in enterprise software or cloud services.
• Strong, active software development skills with production experience in at least two of: Python, TypeScript/JavaScript, Go, Java. You should be writing code regularly, not managing people who write code.
• Demonstrated ability to independently design and deliver technical solutions—prototypes, POCs, and reference architectures—under real deal timelines.
• Hands-on cloud architecture expertise in one or more major platforms (AWS, Azure, GCP)
• Working knowledge of AI/ML concepts including large language models, retrieval-augmented generation, vector databases, and model deployment pipelines.
• Track record of supporting complex, six- and seven-figure enterprise engagements across both new logo acquisition and existing customer expansion.
• Exceptional communication skills with proven ability to present to and influence technical and executive audiences alike.
• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience).

What This Job Offers

• Job Type: Full-time
• Career Level: Principal