Jobs in the United States

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Healthcare Engineer - Project Engineer
Veterans Affairs, Veterans Health Administration
Seattle, WA
Selective Service Registration is required for males born after 12/31/1959
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AI Specialist - VR
Meta
Redmond, WA · Seattle, WA
3+ years experience as an Applied AI Research Scientist or an Applied AI Research Engineer
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Production Network Engineer, Design
Meta
Seattle, WA
Production Network Engineer, Design Responsibilities:
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Staff Software Engineer, AI/ML, Google Cloud
Google
Seattle, WA
Share Staff Software Engineer, AI/ML, Google Cloud
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Software Development Engineer II, AWS Proactive Security / AWS Piezo, AWS Proactive Security - AWS Piezo
Amazon
Seattle, WA
You're a software engineer with experience in distributed systems, security, and large-scale design. You deliver high-quality work independently, make sound technical decisions, and mentor…
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EG
Automated Test Engineer
Eliassen Group
Olympia, WA
- $40 to $50 USD / hour
Our client seeks an Automated Test Engineer to support Hivemind by monitoring and maintaining large volumes of automated tests, troubleshooting failures, and driving bug resolution across…
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Plant Engineer 1 – Melter and Offgas Systems
Amentum
Richland, WA
The Plant Engineer is responsible for technical activities relating to operations and maintenance of plant equipment during Engineering, Commissioning, and Operations. The Melter and Offgas…
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Network Engineer
Amentum
Fort Shafter, HI
Must have an Active Top Secret US Government Clearance with SCI eligibility
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Safety Engineer
Amentum
Kennedy Space Center, FL
Safety Engineer supports Safety and Mission Assurance (S&MA) operations for the Consolidated Operations, Management, Engineering, and Test (COMET) Contract at Kennedy Space Center,…
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Principle Electrical Engineer
Amentum
China Lake, CA
Amentum is seeking a skilled and driven Principle Electrical Engineer to join our engineering team based in China Lake, CA. This is a design-focused role that spans the full product…
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Principle Mechanical Engineer
Amentum
China Lake, CA
Amentum is seeking a skilled and driven Principle Mechanical Engineer to join our engineering team based in China Lake, CA. This is a design-focused role that spans the full product…
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Mechanical Design Engineer (Welding and Manufacturing)
Amentum
Huntsville, AL
The selected candidate serves as a fully competent engineer or scientist in all conventional aspects of the subject matter or the functional area of the assignments. Applies intensive and…
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Senior Electrical Engineer
SOCOTEC
Amesbury, MA
Possess EIT certification. Licensed professional engineer preferred.
Added 1 min ago
Platform Services Software Engineer – Entry Level sign-on & referral bonus
General Dynamics Mission Systems, Inc
Remote, United States
Added 1 min ago
HA
Robotics Engineer, Additive Automation
Hadrian Automation
Torrance, CA
- $280,000 to $400,000 USD / year
We're looking for a Senior Staff Software Engineer to serve as the technical lead for the cell orchestration and machine interface software within a manufacturing capability. You'll lead…
Added 1 min ago
PC
Operating Engineer (Second Shift)
Philadelphia College of Osteopathic Medicine
United States
- $22 USD / hour
The Operating Engineer operates automatically fired boilers to generate hot water that supplies heat or power for buildings. Operates absorber and related air handling units that supply…
Added 2 mins ago
Electrical Engineer
Chugach Government Solutions
Montgomery, AL
The Electrical Engineer provides electrical engineering support in the design, construction, & maintenance of any & all facilities requirements. Leads and prepares design criteria…
Added 2 mins ago
Vehicle Integration Launch Engineer
MARTIN Technologies
Louisville, KY
Candidates must be available for the morning shift, required overtime, and an in-person interview if requested
Added 2 mins ago
Body Structures Launch Engineer
MARTIN Technologies
Louisville, KY
100% Onsite at a Customer Facility | Five Days per Week · Availability to work onsite in Louisville five days per week
Added 2 mins ago
Full Stack DevOps Engineer
Bespoke Technologies
Chantilly, VA
Added 2 mins ago
Associate Engineer, Field Communications
Eversource Energy Service Company
Berlin, CT
Added 2 mins ago
Industrial Engineer
Design Systems, Inc.
Farmington Hills, MI
We are seeking a hands-on Industrial Engineer with 3–5 years of experience to support manufacturing operations, process improvement, labor optimization, and facility layout projects.
Added 2 mins ago
Field Engineer
Cleveland Construction
Lafayette, LA
Added 2 mins ago
Field Engineer
Cleveland Construction
Oak Creek, WI
Added 2 mins ago
FC
Sr. Full Stack Developer
Fresh Consulting
Bellevue, WA
- $80 to $90 USD / hour
You’re a senior, client-facing full stack engineer who’s as comfortable owning a production incident as you are shaping the technical roadmap for what comes next. You move fluidly between…

fun.xyz

Protocol Engineer

NY, United States

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Job details

Posting language: English
Posted: Nov 12, 2026

Original job description

Capital markets are undergoing a fundamental shift. Assets that live in fragmented systems and manual workflows are moving onto blockchains -systems designed to move and store value more transparently and efficiently.

While this unlocks more open and programmable financial systems, it also introduces significant complexity. For most users, interacting with this new infrastructure is still too difficult.

Fun builds the infrastructure that powers consumer-facing fintech applications - handling onboarding, account access, and money movement so users can interact with blockchain-based systems as seamlessly as they do with traditional finance.

For fintech builders, Fun provides a best-in-class onboarding and deposit stack that drives conversion and unlocks user growth. We operate at the intersection of financial infrastructure, complex engineering, and product experience.

Role Overview

We're looking for a Protocol Engineer to join our core blockchain team and help build the foundation of Web3 payments infrastructure. This high-impact role offers the opportunity to work on challenging technical problems at the intersection of smart contracts, cross-chain protocols, and decentralized finance.

You will design and implement secure, efficient smart contract systems and blockchain integrations that power millions of transactions across multiple chains. This role is perfect for a technically strong engineer who thrives in fast-paced environments and wants to shape the future of decentralized finance.

Responsibilities

Design, develop, and deploy secure smart contracts and protocol implementations across multiple blockchain platforms
Collaborate with backend and product teams to architect blockchain solutions that meet business requirements
Write highly efficient, well-tested code and participate in security audits to ensure protocol safety
Research and evaluate new blockchain technologies, protocols, and DeFi primitives for integration opportunities
Contribute to incident response and debugging on-chain issues to ensure protocol reliability

Requirements

Strong experience building and deploying production smart contracts on major blockchain platforms
Deep understanding of blockchain architecture, consensus mechanisms, and cryptographic principles
Hands-on experience with smart contract development languages (Solidity, Rust, Move, etc.)
Solid grasp of DeFi protocols, token standards, and cross-chain communication patterns
Strong security mindset with knowledge of common smart contract vulnerabilities and best practices
Clear communicator who can explain complex blockchain concepts to cross-functional teams

Nice to Have

Production experience with multiple blockchain ecosystems (Ethereum, Solana, L2s, etc.)
Previously worked at crypto startup or Web3 infrastructure company
Experience with cross-chain bridges, oracles, or interoperability protocols
Background with high-volume DeFi protocols or DEX infrastructure
Contributions to blockchain open source projects or protocol research
Experience with formal verification or advanced smart contract testing frameworks

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Jobs in the United States