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Sunny Day Fund ☀️

Senior Full-Stack Engineer

Remote

Virginia, United states

$ 100,000 /year

Senior

Full Time

11-11-2025

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Skills

SQL Cloud Security Workday CI/CD DevOps Monitoring Architecture Application Architecture Databases angular node.js AWS PostGres

Job Specifications

Sunny Day Fund Full Stack Engineer

Learn more about us at www.sunnydayfund.com  

We’re looking for a mission-delusional engineer to join a high-velocity, high-impact team building wealth and financial well-being for frontline workers.

If you love to…

Build a product that’s “mission-delusional,” as we like to call it  
Learn continuously and take initiative  
Solve problems and find simple, practical solutions  
Iterate based on feedback from real users  
Explore new technologies to better serve Savers  
Collaborate with teammates and celebrate wins

You’ll thrive at Sunny Day Fund, where each day you’ll challenge yourself, grow with talented colleagues, and know your work impacts American workers.

The Ideal Candidate

Ready with the right experience, expertise, and personal drive to be a core engineer at a rapidly growing fintech with a big vision  
Able to solution features and capabilities within the platform, with good code quality and velocity  
Prepared to take on responsibilities such as implementing integrations with third-party systems, collaborating with cross-functional teams, designing and developing APIs, and contributing to system improvements

Requirements

Bachelor's degree, ideally in Computer Science or Computer Engineering
3–5 years of experience as a software engineer
3+ years of experience in application architecture, design, and development, particularly with Node.js frameworks (NestJS, Express.js, etc.)
3+ years of experience developing client-facing front-end applications using a modern web framework, Angular preferred
Proficient with SQL and experience with relational databases like Postgres
Familiarity and experience with CI/CD, DevOps, and build systems
Experience designing, building, and maintaining cloud-native applications (preferably AWS)
Knowledge of OWASP Top 10 and other application and cloud security best practices, including secure API design, data protection, identity and access management, and vulnerability monitoring in cloud environments (e.g., AWS)

Bonus

Familiarity with AWS DevSecOps processes and experience with SOC2 compliance
Experience designing and building event-driven services on AWS
Experience with a headless CMS, specifically Strapi
Experience working at a startup
Domain knowledge:
HR tech, including HCM data models and integrations with payroll and HCM systems (ADP, UKG, Workday)
Fintech, including core banking and concepts such as Banking as a Service (BaaS), integrations, and payments

Qualitative Characteristics

Mission-driven
Contributes to a culture of belonging
Constant student who’s also willing to teach others on the team
Systems thinker who understands the value of “the little things”
Capable of communicating the stakeholder value of a feature beyond its pure functionality

Location: Remote Working from:

US – Virginia, ideally Richmond, VA or Northern Virginia 

We are mostly remote, but have occasional in-person gatherings and working days.

Sunny Day Fund Overview

Sunny Day Fund™ is a venture-backed company on a mission to enable better financial well-being for all 152M American workers, starting with employer-rewarded emergency savings. And we invite you to join our mission.

Our Values

Respect – Mutual respect powers mutual success
Collaboration – Brighter Together
Urgency – Our Impact Can’t Wait
Resilience – Tenacity to Bend, Not Break
Kaizen – “Good Enough” Isn’t Good Enough
Data-Driven – The Journey to Happiness Can Be Measured
Transparency – Let's Be Clear

Compensation

$80k–$100k (USD) base salary
Competitive equity (Restricted Stock Awards, which are better than options!)
Company milestone-driven bonuses

Benefits

Remote working
Sunny Day Fund – our own workplace emergency and personal savings program with up to $2,000 of cash rewards, no restrictions or penalties to withdraw
Health, dental, and vision insurance reimbursement (QSEHRA) – fully covers Silver plans and 80%+ of Gold plans
Flexible PTO
401(k)
Schedules flexible outside of outcomes and standups
Team events and outings

Note Due to the sensitive nature of our data, we are looking for full-time U.S.-based employees to join our team. We are not seeking contractors or recruiters.

About the Company

Sunny Day Fund delivers the leading financial wellness platform that automates and incentivizes workplace emergency savings. Experts predict 40-60% of all employers will offer emergency savings accounts as a benefit by 2026 driven by Secure Act 2.0, which passed because of growing 401(k) loans and hardship withdrawals and continued financial vulnerability. As a result of the benefit, employers have been able to realize ~10x take-up rate compared to a basic financial literacy application, ~25% higher retention within particip... Know more