Senior Blockchain Engineer
Salary:
$175,000 - $185,000 - Per Annum
Locations:
San Francisco, California, United States
Type:
Permanent
Published:
February 13, 2026
Contact:
Robert Gwillim
Ref:
19963
Required Skills:
Digital transformationShare this job
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Job title: Senior Blockchain Engineer
Job type: Perm
Salary: $175,000 - $185,000
Role Location: California, United States (Los Angeles or San Francisco)
Visa requirements: US Work Authorization required
The company: Our client, is a well-funded, next-generation technology company with a mission to build secure and inclusive digital ecosystems. As the driving force behind a niche product they combine Blockchain and biometrics to deliver platforms that redefine trust, payments, and data. They are building three core platforms:
We are seeking an experienced Senior Blockchain Engineer to architect and implement the blockchain foundation of the firm’s ecosystem. You will design secure, scalable, and user-friendly blockchain solutions that integrate biometric identity, payments, and data services. We’re building a dedicated RWA Layer 1 chain focused on asset definition, settlement, and verification at the base layer, with Layer 2 compatibility and strong real-world integration. The ideal candidate is passionate about building new blockchain infrastructure from scratch and can translate research concepts into practical system blueprints, collaborating effectively with our core engineering team. This is a hands-on engineering role for someone who has deep blockchain expertise, thrives in 0?1 innovation, and is motivated to build real-world applications at global scale. Key responsibilities:
Job requirements:
Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.
We make an active choice to be inclusive towards everyone every day. Please let us know if you require any accessibility adjustments through the application or interview process.
Our Commitment to Diversity, Equity, and Inclusion:
Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.
Check out our DE&I page here
Job type: Perm
Salary: $175,000 - $185,000
Role Location: California, United States (Los Angeles or San Francisco)
Visa requirements: US Work Authorization required
The company: Our client, is a well-funded, next-generation technology company with a mission to build secure and inclusive digital ecosystems. As the driving force behind a niche product they combine Blockchain and biometrics to deliver platforms that redefine trust, payments, and data. They are building three core platforms:
- Face Scan (Proof of You): Biometric identity verification ensuring every user is a real human.
- BioPay: Blockchain-powered payment solution for fast, secure, and inclusive transactions.
- Zeus Database: A scalable, analytics-ready data infrastructure powering AI and blockchain applications.
We are seeking an experienced Senior Blockchain Engineer to architect and implement the blockchain foundation of the firm’s ecosystem. You will design secure, scalable, and user-friendly blockchain solutions that integrate biometric identity, payments, and data services. We’re building a dedicated RWA Layer 1 chain focused on asset definition, settlement, and verification at the base layer, with Layer 2 compatibility and strong real-world integration. The ideal candidate is passionate about building new blockchain infrastructure from scratch and can translate research concepts into practical system blueprints, collaborating effectively with our core engineering team. This is a hands-on engineering role for someone who has deep blockchain expertise, thrives in 0?1 innovation, and is motivated to build real-world applications at global scale. Key responsibilities:
- Design, build, and maintain blockchain protocols, smart contracts, and distributed systems powering the firm’s ecosystem
- Develop tokenized payment systems and identity verification flows, ensuring high security and usability.
- Implement smart contracts for token utility, payments, and governance.
- Ensure security, scalability, and efficiency of blockchain systems through rigorous testing and best practices.
- Integrate biometric verification (Face Scan) and payment flows (BioPay) into blockchain applications.
- Collaborate with Product, Engineering, and QA teams to align blockchain development with roadmap and user needs.
- Mentor junior engineers and contribute to best practices for blockchain development
- Stay ahead of emerging trends in real-world asset (RWA) tokenization, DeFi, and decentralized identity to guide innovation.
Job requirements:
- Bachelor’s or Master’s degree in Computer Science, Cryptography, or related technical field.
- Public technical footprint — GitHub contributions, open-source code, technical articles, or recorded talks that demonstrate hands-on expertise.
- 5+ years of blockchain development experience (protocol, dApps, Layer 1/Layer 2, or DeFi/Web3).
- Proficiency in Golang, Rust, and Solidity.
- Strong understanding of smart contract security, cryptography, and distributed systems.
- Experience with Ethereum, Solana, or other major blockchain platforms.
- Proven track record of delivering production-grade blockchain systems.
- Real-world asset (RWA) tokenization experience.
- Familiarity with fintech, identity verification, or biometric systems.
- Innovator: Excited to work on blockchain systems that combine identity, payments, and real-world applications.
- Explorer mindset: Comfortable with ambiguity, thrives in 0-1 environments, and moves quickly.
- Security-first engineer: Obsessed with trust, reliability, and protecting user data.
- Vision-aligned: Believes in AC Tech’s mission of building secure and inclusive digital ecosystems.
- Competitive salary and equity opportunities.
- 401(k).
- Vision, Dental, and Medical Insurance.
- Paid Time Off (PTO).
Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.
We make an active choice to be inclusive towards everyone every day. Please let us know if you require any accessibility adjustments through the application or interview process.
Our Commitment to Diversity, Equity, and Inclusion:
Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.
Check out our DE&I page here
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