Senior Full-Stack Engineer - Registered Advisor Systems

In Renaissance Florence, the Medici family revolutionized finance by allowing merchants to deploy idle gold securely into active trade and investment. Mercury echoes that same spirit of financial ingenuity for modern tech startups. Mercury Treasury helps ambitious startups put idle cash to work through an elegant, institutional-grade cash management and yield platform holding billions of dollars in customer funds.

As a Senior Full-Stack Engineer on the Treasury team, you will act as a primary technical lead building end-to-end onboarding engines, portfolio recommendation systems, real-time customer dashboards, and internal operational tooling. Working across product, design, compliance, risk, and banking partners, you will architect secure, scalable systems that blend backend financial ledgers with sleek developer and customer-facing interfaces.

Key Responsibilities

• Technical Project Leadership: Lead high-impact, cross-functional engineering initiatives spanning Treasury software, operations, compliance, banking, and risk management pods.
• End-to-End Treasury Architecture: Define, build, and maintain full-stack technical architectures supporting registered investment advisor (RIA) and broker-dealer workflows across individual securities (equities, fixed income) and mutual funds.
• Customer & Operational Interfaces: Ship intuitive, high-reliability features for startup founders, finance teams, and internal operational personnel managing customer portfolios.
• Cross-Functional Collaboration: Partner daily with Product Managers, Designers, and Operations leads to map complex financial regulations and user requirements into clean technical specifications.
• API & Platform Design: Architect internal and external APIs prioritizing developer experience, system reliability, data integrity, and low-latency performance.
• Engineering Mentorship: Active involvement in code reviews, technical architecture reviews, and mentoring both junior and senior engineers across the pod.

Requirements

Software Engineering & Financial Systems Depth

• 5+ years of professional full-stack software engineering experience building, operating, and scaling systems from complex backend infrastructure to user-facing frontend applications.
• Domain Knowledge (RIA & Broker-Dealer): Solid domain knowledge of registered investment advisor (RIA) and broker-dealer mechanisms—supporting securities trading (equities, fixed income, treasury bills) and mutual fund operations.
• Technical Project Leadership Track Record: Demonstrated success leading complex, multi-stakeholder technical projects from concept to production.
• Product-Minded Engineering: Strong mindset focused on end-user experience, intuitive UI, and robust API design rather than just ticket execution.
• Communication & Mentorship: Excellent written and verbal communication skills, with a passionate approach to mentoring peers and fostering inclusive engineering environments.

Selection & Interview Process

1. Recruiter Screen
2. Technical & Architectural Assessment
3. Product & Systems Design Interview
4. Cross-Functional Collaboration & Values Fit

Total Rewards & Benefits

• Compensation & Equity: Market-competitive base salary ($166.6k–$250.9k USD or CAD equivalent depending on seniority level) + equity (stock options / RSUs).
• Health & Life Coverage: Comprehensive medical, dental, and vision insurance packages.
• Remote Work Culture: Home office setup budget, flexible working hours, and continuous learning stipends.
• Financial & Retirement: 401(k) / RRSP matching contributions and paid parental leave.