Senior Full Stack Engineer - Blockchain

ZipRecruiter; Miami (FL); Remote; USD 100,000 - 150,000; Full time

Job summary

A VC-backed on-chain financial infrastructure company is seeking a Senior Full Stack Engineer specializing in blockchain technology. In this fully remote role, you will enhance both the front-end and back-end systems for the Multiliquid protocol. Join a small, dynamic team and contribute to shaping the user experience for DeFi solutions while working on innovative blockchain integrations.

Benefits

Competitive salary and equity upside

Opportunity to work on real-world blockchain integrations

Collaborative, mission-driven team environment

Qualifications

• 5+ years of experience building production-ready full-stack applications.
• Strong proficiency in modern front-end frameworks (React, Vue or Angular).
• Experience with back-end technologies such as Node.js, Express, Python.

Responsibilities

• Build and maintain web applications that interact with smart contracts.
• Collaborate closely with blockchain engineers and product stakeholders.
• Optimize web applications for performance, availability, and responsiveness.

Skills

JavaScript

HTML

CSS

React

Node.js

Problem Solving

Tools

AWS

GCP

Job description

Job Description

Career Renew is recruiting for one of its clients a Senior Full Stack Engineer - Blockchain - this is a fully-remote role and candidates can be based in US/Canada.

We are a VC-backed on-chain financial infrastructure company on a mission to upgrade global financial markets through 24/7 instant settlement. We're building the next of financial rails by bridging traditional finance (TradFi) and decentralised finance (DeFi) in a transparent, efficient, and highly scalable way.

Our first product is Multiliquid — an institutional-grade smart contract protocol that enables deep interoperability and liquidity across tokenised financial assets and stablecoins. As the flagship product, Multiliquid sets the foundation for our broader vision: replatforming the entire financial system on 10x better infrastructure, powered by blockchain.

We’re currently raising a $4M seed round to expand the team and scale the next phase of growth.

We are led by a 3x founder who previously co-founded Allica, a UK-based bank and one of Europe’s fastest-growing companies.

Role Overview

We’re looking for a Full-Stack Engineer to join our core engineering team. In this hands-on role, you’ll build and scale both front-end and back-end systems to facilitate access to and usability of the Multiliquid protocol. You’ll develop our API, user-facing applications, integrate with smart contract infrastructure, and ensure seamless, secure interaction between a wide variety of users, applications and blockchain-based systems. This is an opportunity to help shape the digital interface of institutional DeFi, building products that abstract away complexity and deliver intuitive usability and scalable experiences to our users.

You will work on a small, rigorously selected, senior team of engineers. You will be responsible for collaborating closely with product, compliance, and business stakeholders. This is a high-impact role requiring deep technical expertise, vision, strategic thinking, strong leadership skills, and a passion for delivering best-in-class DeFi solutions.

Key Responsibilities

Full-Stack Development

Build and maintain web applications that interact with smart contracts and blockchain infrastructure.

Design intuitive, performant UIs and integrate them with secure, efficient back-end services.

• Develop APIs, data models, and business logic that support institutional-grade use cases.

Cross-Functional Collaboration

Collaborate closely with blockchain engineers and product stakeholders to translate protocol logic into usable interfaces and tools.

• Participate in design sessions, sprint planning, and code reviews to align execution with vision.

Scalability & Reliability

Optimize web applications for performance, availability, and responsiveness under heavy institutional traffic.

• Ensure seamless, low-latency interaction between front-end systems and onchain protocols.

• Contribute to a scalable, secure back-end infrastructure supporting liquidity flows across chains.

Security & Compliance

Implement robust authentication and access control for institutional-grade users.

Follow security best practices for data protection and transaction integrity across the stack.

• Proactively identify and address vulnerabilities and edge cases in both UI and API layers.

Hands-On Engineering

• Actively write and deploy code across front-end and back-end systems.
• Lead the development of core features, dashboards, and admin tools for managing external-facing and internal workflows.
• Prototype, build, test, iterate and troubleshoot rapidly in a fast-moving environment.

Required Qualifications

Experience

5+ years of experience building production-ready full-stack applications.

Strong proficiency in modern front-end frameworks (React; Vue or Angular also welcome).

Experience with back-end technologies such as Node.js, Express, Python, or similar.

Familiarity with blockchain integrations (e.g., web3.js, ethers.js) is a major plus.

Technical Skills

Proficiency with RESTful APIs, GraphQL, and smart contract integrations.

Experience with SQL and/or NoSQL databases (e.g., PostgreSQL, MongoDB).

Familiarity with cloud platforms (AWS, GCP) and CI/CD pipelines.

• Solid knowledge of modern JavaScript (ES6+), HTML, and CSS.

Soft Skills

Solid knowledge of modern JavaScript (ES6+), HTML, and CSS.

Maniacal attention to detail and excellent ability to receive and internalize feedback.

Clear communicator able to work with both technical and non-technical teams.

Strong problem-solving abilities and comfort navigating complex systems.

Adaptable and entrepreneurial mindset suited to early-stage environments.

• Desire to contribute professionally and personally as a member of a dynamic, collaborative, high-performing team.

Why Join Us?

• Impact: Help shape the user experience and interface of the future liquidity layer for tokenized finance.
• Innovation: Work on real-world blockchain integrations powering institutional-grade capital flows.
• Learning: Expand your understanding of DeFi, tokenized assets, and decentralized infrastructure.
• Team: Join a collaborative, mission-driven team backed by top investors.
• Upside: Competitive salary, equity upside, and the chance to be an early builder of a transformative protocol.