Jobs in the United States

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Added 17 mins ago
M
Principal Security Engineer Manager
Microsoft
United States
- $165,600 to $331,200 USD / year
In this Principal Security Engineer Manager role, you will manage a team of security engineers tasked with building cutting-edge automation for vulnerability discovery and remediation. The…
Added 18 mins ago
M
Principal Data Engineer - XBOX Growth
Microsoft
WA · Redmond, WA · Redmond
- $142,800 to $304,200 USD / year
…scorecards and AI agents give the same answer. We are looking for a Principal Data Engineer who is as comfortable defining a metric as building the pipeline behind it. You will lead the…
Added 18 mins ago
M
Principal Software Engineer Lead, Gameplay Systems - Minecraft
Microsoft
WA · Redmond, WA · Redmond
- $142,800 to $304,200 USD / year
As Engineering Lead, you will be accountable for the technical direction, architecture, and delivery of core gameplay systems through your team, supporting them in evaluating requirements,…
Added 25 mins ago
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Principal CAD Software Engineer
Microsoft
CA · NC · OR · Mountain View, CA · Raleigh, NC · Hillsboro, OR
- $142,800 to $304,200 USD / year
The Microsoft Silicon Engineering and Solutions Team is seeking a passionate and driven software engineer to be a technical leader for our central software team. This team drives…
Added 26 mins ago
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Principal Software Engineer
Microsoft
WA · Redmond, WA · Redmond
- $142,800 to $304,200 USD / year
We’re looking for a Principal Software Engineer to help build and evolve the MDASH scanning engine as we work to advance agentic code scanning. In this role, you’ll design and build systems…
Added 39 mins ago
Mechanical Design Integration Engineer (Level 2 or 3)
Northrop Grumman
El Segundo, CA
Northrop Grumman Aeronautics Systems sector is hiring a Mechanical Design Integration (MDI) Engineer (Level 2) / Principal Mechanical Design Integration (MDI) Engineer (Level 3) to join our…
Added 40 mins ago
Engineer/Principal Engineer Aeronautical - Hardware Avionics
Northrop Grumman
San Diego, CA
Northrop Grumman Aeronautics Systems has an opening for an Engineer Aeronautical - Hardware Avionics (Level 2) or Principal Engineer Aeronautical - Hardware Avionics (Level 3) to join our…
Added 40 mins ago
Sr Principal Network Engineer
Northrop Grumman
San Diego, CA
Northrop Grumman Mission Systems is a trusted provider of mission-enabling solutions for global security. Our organization is chartered with providing the skills, innovative technologies to…
Added 40 mins ago
Senior Principal Digital Engineer
Northrop Grumman
Los Angeles, CA
The Digital Engineer will be responsible for design and verification of digital systems on a safety-critical development program. Candidate is required to have extensive knowledge of…
Added 40 mins ago
Principal Digital Engineer
Northrop Grumman
Los Angeles, CA
The Digital Engineer will be responsible for design and verification of digital systems on a safety-critical development program. Candidate is required to have extensive knowledge of…
Added 40 mins ago
Principal / Senior Principal Software Engineer
Northrop Grumman
Los Angeles, CA
We are looking for you to join our team as a Principal Software Engineer or Senior Principal Software Engineer based out of Woodland Hills, CA . As a Software Engineer at Northrop Grumman…
Added 40 mins ago
Principal / Senior Principal Software Engineer
Northrop Grumman
Los Angeles, CA
We are looking for you to join our team as a Principal or Senior Principal Software Engineer based out of Woodland Hills, CA . As a Software Engineer at Northrop Grumman Mission Systems you…
Added 57 mins ago
MES Systems Engineering - Sr. Principal
Eli Lilly and Company
United States
The MES System Engineer - Sr. Principal owns the technical integrity, standardization, and long-term health of the PharmaSuite solution that underpins the Next Generation Manufacturing…
Added 1 hour ago
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Agentic-First Software Engineer (Irvine / San Francisco)
Jiffy
Remote, United States
- $195,000 to $265,000 USD / year
Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and…
Added 1 hour ago
J
Agentic-First Software Engineer (Relocate to Miami)
Jiffy
Remote, United States
- $150,000 to $265,000 USD / year
Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and…
Added 1 hour ago
J
Agentic-First Software Engineer (Irvine / San Francisco)
Jiffy
Remote, United States
- $195,000 to $265,000 USD / year
Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and…
Added 1 hour ago
J
Agentic-First Software Engineer (Miami)
Jiffy
Remote, United States
- $150,000 to $265,000 USD / year
Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and…
Added 1 hour ago
J
Agentic-First Software Engineer (Relocate to Miami)
Jiffy
Remote, United States
- $150,000 to $265,000 USD / year
Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and…
Added 1 hour ago
V
Principal BMS & PMS Controls Engineer
Volta
Remote, United States
- £210,000 to £260,000 GBP / year
As Principal BMS & PMS Controls Engineer, you will be Volta's technical authority for building and power management controls. You will set the controls architecture, standards and…
Added 1 hour ago
Staff Software Engineer, Mobile and On-Device Agentic AI, XR
Google
San Jose, CA · San Francisco, CA
…information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and mobile;…
Added 1 hour ago
Sr Principal Systems Engineer
CORP-Corporate Office
United States
Northrop Grumman Aeronautics Systems has an opening for a Sr Principal Systems Engineer Requirements and Verification (R&V) Lead to join our team of qualified, diverse individuals within…
Added 1 hour ago
Principal Engineer Systems RQ-4 FMS IFC Manager
CORP-Corporate Office
United States
Northrop Grumman Aeronautics Systems has an opening for a Principal Systems Engineer - RQ-4 FMS IFC Manager to join our team of qualified, diverse individuals within our Systems Engineering…
Added 1 hour ago
Facilities Principal Mechanical Engineer
GlobalFoundries
ROUND LAKE, NY
…full-service semiconductor foundry providing a unique combination of design, development, and fabrication services to some of the world's most inspired technology companies. With a global…
Added 1 hour ago
Principal Software Engineer - Ai
ServiceNow
Santa Clara, CA
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 1 hour ago
Software Engineer
NBC Universal
New York, NY
Design, develop, and maintain high-performance software systems and features, primarily using Go, to support large-scale video streaming platforms such as Peacock and NOW/WOW.

MarcoPolo Learning

Contract Systems Architect - AI, AWS & Consumer Platforms

Remote, United States

Remote

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Job details

Workplace: Remote
Posting language: English
Posted: Nov 3, 2026

Original job description

Contract Systems Architect - AI, AWS & Consumer Platforms

Engagement: Project-based independent contractor Location: Remote, worldwide; North American time zones preferred Schedule: Flexible, with agreed overlap with our team Compensation: Hourly or fixed project fee, based on scope and experience

About us

We’re an AI-focused consumer technology startup building products designed to reach a large user base. We’re looking for an experienced Systems Architect to help us make practical technical decisions, deliver reliable AI capabilities, and establish infrastructure that can grow with the business.

This is a project-based contract role. Each engagement will have an agreed scope, timeline, deliverables, and acceptance criteria. Follow-on projects may be available as our needs evolve.

The role

You’ll work directly with founders and engineers to translate product goals into secure, scalable, and cost-effective systems. Your work may span architecture reviews, AWS infrastructure, AI model integration, agentic workflows, and production readiness.

You should be comfortable moving from architecture diagrams to code, prototypes, infrastructure configuration, and technical reviews. We value clear judgment: knowing what to build now, what to defer, and when a simpler design will serve the business better.

What you’ll do

Assess our product requirements, existing architecture, and infrastructure; identify risks, bottlenecks, and priorities.
Design AWS architectures for consumer applications, including APIs, compute, storage, databases, caching, queues, and asynchronous processing.
Evaluate AI models and providers against representative workloads, balancing output quality, latency, reliability, privacy, and cost.
Design AI capabilities such as retrieval-augmented generation, structured outputs, tool use, and agent orchestration where they improve the product.
Establish production controls for AI workflows, including evaluations, tracing, execution limits, retries, fallbacks, and appropriate human approval.
Address consumer platform needs such as authentication, authorization, user data protection, traffic spikes, abuse prevention, and responsive user experiences.
Define infrastructure as code, deployment pipelines, environment separation, monitoring, backup, and recovery practices.
Partner with engineers on implementation, review critical code and infrastructure changes, and validate key assumptions through prototypes or load testing.
Document decisions and provide a clear handoff so our team can operate and extend the systems independently.

What you’ll bring

A strong track record as a Systems Architect, Staff/Principal Engineer, or technical leader building and operating production software.
Deep hands-on AWS experience and the ability to explain service choices and architectural tradeoffs.
Experience shipping consumer applications and managing growth, availability, performance, and infrastructure costs.
Production experience integrating LLMs and building AI workflows beyond demonstrations or proofs of concept.
Current knowledge of leading commercial and open-weight models, with a repeatable approach to evaluating new releases.
Strong backend engineering skills in Python, TypeScript/Node.js, or comparable languages.
Experience with relational databases, caching, messaging, containers or serverless systems, and infrastructure as code.
Practical understanding of AI security risks, including prompt injection, sensitive data exposure, and excessive tool permissions.
Clear written communication, reliable project estimation, and experience delivering independently within an agreed scope.

Useful additional experience

Early-stage startups with small engineering teams.
Amazon Bedrock and direct model-provider APIs.
Agent frameworks and Model Context Protocol (MCP) integrations.
Retrieval systems, vector search, personalization, or multimodal AI.
Model routing, inference optimization, and cost measurement per user or completed task.

Typical project deliverables

Depending on the engagement, deliverables may include:

An architecture assessment and prioritized recommendations.
A target architecture, documented tradeoffs, and phased implementation plan.
Working prototypes or production components for critical capabilities.
Infrastructure code, deployment configuration, and operational runbooks.
Performance, reliability, AI quality, and cost benchmarks.
Engineering handoff documentation and knowledge-transfer sessions.

Success means delivering systems that meet agreed requirements, fit our stage and budget, and can be maintained by our team.

Candidates worldwide are welcome. North American time zones are preferred, but we’re open to candidates elsewhere who can provide suitable working-hour overlap.

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More about this job

Skills

AWS
Product comprehension
Data protection
Infrastructure as code
Industrial software
Python
TypeScript
Node.js
Security threats
Communication skills
Estimating
Documentation

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