Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Principal Software Engineer

Ardenir, Inc

Job Description

Job Description

About Ardenir

Ardenir is building the AI ad agency of the future. We run paid acquisition end-to-end across all the major ad platforms using AI agents that plan campaigns, produce creative, manage spend, and attribute value.

The Role

As Ardenir's Principal Engineer, you'll own how we build software. We've adopted an AI-forward approach in which agents write our code. When a person has to review a line by hand, we treat it as a defect; a sign that something failed in a specification, a test, or a safeguard. Your job is to make sure our AI practices produce code that is correct, reliable, and gets better over time, and to personally take on our most difficult technical problems.

You'll report to the CTO, who builds and leads the engineering team. Between you, you'll hold the deepest technical responsibility in the company. The CTO owns the overall architecture, the team, and the company's technical direction, while you own how code gets written and verified.

We care about the quality of your work and the clarity of your thinking, not your years of experience or the size of any team you've led. You are an engineer others turn to when they're stuck, someone who has already reshaped how a team builds software alongside AI agents. In a few years, the systems you shape will manage hundreds of millions of dollars in ad spend across thousands of customer accounts.

What You'll Own

The development approach. Our specifications, and the workflow that carries a task from plan to finished, verified code. We treat the specification as authoritative and generate the code from it. You judge when a task needs a full specification and when a brief instruction will do.

The intelligence in the product. The reasoning that makes Ardenir's agents effective, built into our business-logic layer, including custom models where they give us an edge, for example in attribution.

Verification. The automated checks that confirm the agents' code matches the specification, fits the architecture, and stays within its safeguards plus separate agents that review the work rather than letting the author judge itself.

Coordinating the coding agents . How work is divided among them, how they pass tasks between one another, and how we catch the plausible-looking mistakes these models produce.

The most demanding technical work, hands-on. The core of the agent system and our ad platform integrations, such as Meta, Google, TikTok, and Amazon including their rate limits, authentication, failure modes, and constant changes.

Reliability and containment. Catching problems before they reach a customer's account, and limiting the damage when something goes wrong with live spending.

The standard for quality. The patterns, conventions, and definition of finished work written down so agents follow them and no one enforces them by hand.

What You Won't Own

The CTO owns the overall technical vision, hiring and leading the engineering team, security and compliance, and the company's external technical decisions. The Head of Performance owns marketing outcomes and defines how the system should behave to achieve those outcomes. The CEO owns sales, fundraising, product strategy, and the financials.

Requirements

  • You've delivered production software under real deadlines, making sensible scope and trade-off decisions to ship rather than gold-plating.
  • You've built distributed systems that stay correct and resilient under load and failure, where mistakes have real consequences.
  • You've built and run agent-based systems in production agents doing real work, operating reliably, not prototypes or experiments.
  • You've built the frameworks that let agents write software the development machinery itself, not just worked within someone else's.
  • You can evaluate and improve agent behavior in production: eval design, tracing and observability, and turning that signal into measurable gains in reliability.
  • Full-stack, in earnest: backend, frontend, and data infrastructure.
  • AWS, or comparable cloud experience.

Preferable:

  • Experience with our stack: Rust, TypeScript, AWS-native.
  • Experience with ad-platform APIs, such as Meta and Google.
  • A background in adtech, martech, or performance-marketing infrastructure.
  • Hands-on work with multimodal generative models in production.
  • Experience taking infrastructure through SOC 2 and GDPR from the start.

Benefits

  • Unlimited PTO
  • Health Benefits
  • 401K
Vacancy posted 14 days ago
Similar jobs that could be interesting for youBased on the Principal Software Engineer in Seattle, WA vacancy
  •  ...their career to new heights. Join the ranks of top talent at one of the world's most influential companies. As a Senior Principal Software Engineer at JPMorganChase within the CDAO AI/ML Data Platforms Team, you provide deep engineering expertise and work across agile... 
    Suggested

    J.P. Morgan

    Seattle, WA
    20 days ago
  • $200k - $250k

     ...excel at building microservices and managing cloud infrastructure? If so, we have an exciting opportunity for you as a Principal Backend Software Engineer at Trase Systems. As a Principal Software Engineer specializing in Backend Engineering, you will play a pivotal role... 
    Suggested
    Remote work

    CloudDevs

    Seattle, WA
    4 days ago
  • $65k - $85k

     ...Ascendion is a full-service digital engineering solutions company. We make and manage software platforms and products that power growth and deliver captivating experiences to consumers and employees. Our engineering, cloud, data, experience design, and talent solution... 
    Suggested
    Temporary work

    Ascendion

    Seattle, WA
    4 days ago
  • $200k - $240k

     ...Role The software team at K2 aims to blur the lines between various types of software development and encourages team members to get...  ...Qualifications Bachelor's degree in computer science, computer engineering, electrical engineering, math, or another STEM discipline, or... 
    Suggested
    Permanent employment

    K2 Space Corporation

    Seattle, WA
    4 days ago
  • $160k - $250k

     ...every touchpoint. Backed by leading investors, we’re building software that adapts to the user, not the other way around. We move...  ...’ll do your best work here. The Role Gradial is seeking a Principal Software Engineer to drive the architecture and technical vision behind AI-... 
    Suggested

    Gradial

    Seattle, WA
    4 days ago
  •  ...Overview Tech Talent Specialist | USA | Around the whole SDLC Senior / Principal Software Engineer Some roles keep you fixing features no one notices. Others let you build tech that actually stops real cyber threats before they cause chaos. (This role is the second one... 
    Home office

    Tact.ai

    Seattle, WA
    4 days ago
  •  ...competence center. Together, all the developers, technicians, engineers and designers take on the challenges of creating the next innovation...  .... Department This center will be responsible for innovative software development for the global brand with a focus on highly... 

    Mercedes-Benz Research & Development North America

    Seattle, WA
    4 days ago
  • $274k - $376.2k

     ...at the local office three times a week. We are a small team of engineers exploring new Auth0 products and features, taking ideas from 0...  ...’ll be doing We are looking for a very senior, knowledgeable Software Architect (P6). Responsibilities include: Implement proof of concepts... 
    Work at office
    Local area
    Flexible hours

    Okta, Inc.

    Bellevue, WA
    4 days ago
  •  ...The Role Join us in revolutionizing the lending landscape. SoFi is seeking enthusiastic Principal Software Engineers who are ready to lead the technical and strategic evolution of our financial services platform in support of our goals that put our members in control... 
    Full time
    Temporary work
    Work experience placement
    Remote work

    SoFi

    Seattle, WA
    4 days ago
  • $202.1k - $299.63k

     ...What you’ll do The Orchestration team is looking for a Principal Software Engineer to help define, architect, and deliver the next generation of contract negotiation and collaboration. This individual contributor role reports to the VP of Engineering and involves turning... 
    Contract work
    Work at office
    Remote work
    Shift work
    2 days per week

    DocuSign

    Seattle, WA
    13 hours ago
  • $109.7k - $234.6k

     ...You care about creating usable, useful software that solves real problems and brings delight...  ...concepts. You work well with non-engineers. You can lead a conversation in a room with...  ...levels of the stack. Responsibilities As a Principal Software Engineer, you will lead the... 
    Temporary work
    Flexible hours

    Oracle

    Seattle, WA
    4 days ago
  • $187.5k - $281.25k

     ...Your Mission Join our innovative team as a Principal Software Engineer to shape the future of our AI Assistant. You will be instrumental in developing core features that enhance our AI technology's capabilities and user experience. What you'll do at UiPath Develop and... 

    UiPath

    Bellevue, WA
    3 days ago
  • $264.1k - $369.74k

     ...and governance to align technology and business strategies. We are seeking an exceptionally talented and experienced Sr Principal Software Engineer to lead the technical strategy for Blue Origin’s Software Development organization. This dynamic org is responsible for key... 
    Permanent employment
    Temporary work
    Local area
    Relocation

    Blue Origin

    Seattle, WA
    4 days ago
  •  ...works. We’re committed to creating category‑leading enterprise software that unleashes that power. To make that happen, we need people...  .... Core Domain Expertise: Deep technical background in Workflow Engines, Orchestration, and structured/unstructured data/document processing... 
    Work at office
    Immediate start
    Remote work

    ROLE

    Bellevue, WA
    4 days ago
  • $172.6k - $259k

     ...the digital systems behind our games — for players, retailers, and the studios that develop our worlds. We are seeking a Principal Software Engineer who can guide product ideas through every stage with agentic AI — from defining the problem with business partners, to developing... 
    Work experience placement

    Hasbro

    Renton, WA
    4 days ago
  • $117.1k - $187.3k

     ...Content Systems, Content workflows and Content AI platforms. As a successful technology leader, you will build and lead remote software engineering organizations using agile principles to architect and deliver high availability enterprise software. You will partner... 
    Work experience placement
    Local area
    Remote work

    Cengage Group

    Seattle, WA
    4 days ago
  • $197.3k - $313.7k

     ...months to ensure you are not duplicating efforts. Job Category Software Engineering Job Details About Salesforce Salesforce is the #1 AI CRM,...  ...you are the future of Salesforce. Salesforce is seeking a Principal Software Engineer (PMTS) to join the Tableau Agent... 

    Tableau

    Bellevue, WA
    4 days ago
  • $244k - $366k

     ...Snap Engineering teams build fun and technically sophisticated products that reach hundreds of millions of Snapchatters around the...  ...execute with privacy at the forefront. We’re looking for a Principal Software Engineer to join the Core Growth Team at Snap Inc! Core Growth... 
    Work at office
    Local area

    Snap

    Seattle, WA
    4 days ago
  • $235.2k - $294k

     ...while learning, having fun, and making a profound difference for the dreamers and builders in the world. We are seeking a Staff Software Engineer (IC6) to join our Customer Trust & Engineering organization as the technical owner of Identity & Access Management and Key... 

    DigitalOcean

    Seattle, WA
    2 days ago
  •  ...their career to new heights. Join the ranks of top talent at one of the world's most influential companies. As a Senior Principal Software Engineer at JPMorganChase within the VPC Network organization, you provide deep engineering expertise and work across agile teams... 

    J.P. Morgan

    Seattle, WA
    19 days ago
  • £225k per year

     ...Anthropic is seeking talented and experienced Infrastructure Engineers to join our team and support the development, scaling, and maintenance...  ...systems design tradeoffs, keeping track of rapidly evolving software systems. Deadline to apply: None. Applications will be... 
    Work at office
    Home office
    Visa sponsorship
    Relocation package

    Anthropic

    Seattle, WA
    4 days ago
  • $163.9k - $270.88k

     ...StylehybridLocationSeattle,WA,United StatesTravelUp to 25%RolePrincipal Software Engineer- EngWhy UKG:At UKG, the work you do matters. The code you...  ...together. Because at UKG, your work matters—and so do you.Principal Software Engineer-ENG:This Principal Software Engineer- Eng... 
    Immediate start

    Ukg-6

    Seattle, WA
    4 days ago
  • $264.1k - $369.74k

    Blue Origin seeks a Sr Principal Software Engineer in Seattle, WA, to lead software development strategies across engineering, supply chain, and manufacturing. This role involves mentoring developers, interfacing with customers, and advocating for AI applications in software... 

    Blue Origin

    Seattle, WA
    3 days ago
  • $132k - $264k

     ...standards for building scalable, reliable, secure production systems. About the team Our team operates at the forefront of software engineering, AI systems, and data-driven innovation, delivering platforms that enable intelligent automation and agent orchestration at... 
    Full time
    Temporary work
    Part time

    Walmart

    Bellevue, WA
    13 hours ago
  • $220k - $240k

    Principal Software Development Engineer (SDE) AI/ML HCLTech is looking for a highly talented and self‑motivated Principal Software Development Engineer (SDE) AI/ML to join it in advancing the technological world through innovation and creativity. Job Title: Principal Software... 
    Full time
    Local area

    HCLTech

    Seattle, WA
    13 hours ago
  • $222.61k - $333.91k

     ...artificial intelligence, to deliver maximum customer value. As a Principal Engineer you will work end-to-end to identify technical risks and...  ...engineering, UX and product management to create the best software possible Write maintainable and testable code Your Background... 
    Immediate start
    Flexible hours

    Highspot

    Seattle, WA
    13 hours ago
  • $264k - $379.5k

    Join to apply for the Principal Software Engineer role at Snowflake Get AI-powered advice on this job and more exclusive features. Snowflake is about empowering enterprises to achieve their full potential — and people too. With a culture that’s all in on impact, innovation... 
    Immediate start
    Remote work
    Flexible hours

    Snowflake

    Bellevue, WA
    13 hours ago
  • $132k - $264k

    Position Summary As a Principal Software Engineer on the Marketplace Platform team, you will play a pivotal role in driving the architecture, design and maintenance of advanced frameworks that elevate Walmart's Marketplace capabilities, ensuring unparalleled experiences... 

    Walmart

    Bellevue, WA
    13 hours ago
  • $230.77k - $323.08k

    Overview We are seeking a highly skilled Principal Software Engineer to develop and lead the technical strategy for the Supply Chain Technology organization. This team focuses on building scalable solutions that automate and simplify Supply Chain and Manufacturing business... 
    Permanent employment
    Temporary work
    Local area

    Blue Origin

    Seattle, WA
    13 hours ago
  • $280k - $330k

     ...systems that operate at scale. This role is data‑centric software engineering at a very high bar: you own substantial parts of the transformation...  ...improvements across the team. What You’ll Do As a Principal Software Development Engineer, you bring a strong data engineering... 

    Auger Services Inc

    Bellevue, WA
    13 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Principal Software Engineer. Be the first to apply!