Senior Fullstack Engineer

Want to help everyday Americans invest and build wealth? Financial inequality is increasing, and too many people are getting left behind. At Stash, we’re passionate about democratizing wealth creation through education, advice, and products that help customers achieve greater financial freedom. We also believe in working smarter—leveraging AI and emerging technologies to move faster, operate more efficiently, and focus our time on solving meaningful problems for our customers. We’re looking for a Senior Fullstack Engineer to lead our B2B efforts for the StashWorks product. StashWorks is an existing platform that plays a critical role in bringing modern, accessible fintech solutions to the workplace. with a small but growing set of clients, and this role will be responsible for evolving the product, scaling its capabilities, and driving its next phase of development. You will own the overall product roadmap while partnering closely with our StashWorks General Manager (GM) to support sales cycles and expand our employer footprint. You’ll operate at the intersection of product strategy, fintech, and go-to-market execution — refining a live product, incorporating real customer feedback, and balancing near-term commercial needs with long-term platform maturity. Stash is aggressively retooling into an AI-first engineering culture, and you will be at the forefront of that transition. We expect you to be a trailblazer, heavily leveraging tools like Cursor, Opus, and GPT to accelerate the 'easy 80%' so you can focus your brainpower on architecture, security, and strategy. You won't just be building a product; you will be helping us define the modern way to ship it. What you'll do: Act as an "Agent Conductor" to architect, design, and rapidly implement services by leveraging AI coding assistants. Own the end to end delivery of software from inception to production Instrument, test, profile, and code review software Continuously deploy to our cloud-based infrastructure Scale software infrastructure for a quickly-growing user base What we're looking for: 4-7 years of professional experience building software Proven hands-on experience with AI tools (e.g., Cursor, ChatGPT, etc.) as a core part of daily workflows, driving productivity and enhancing output quality, alongside a commitment to continuously developing AI expertise Consistent integration of AI into workflows and decision-making, with strong judgment—validating outputs, adhering to Stash guidelines (especially for sensitive data), and owning the quality of AI-assisted work Experience building backend APIs and services in a highly collaborative team setting Creative problem solver with a passion for testing, debugging, and overall code quality Experience with event-based architectures Familiarity with or interest in docker, AWS, Terraform, Datadog Data-driven decision maker, willing to take risks, fail fast, and iterate at the speed of AI generation. A keen understanding of testing best practices Familiarity with Ruby, Go Gold Stars: Experience building applications at scale Familiarity with or interest in Kubernetes, Consul, multi-region systems, multi-cloud design Familiarity with or interest in other areas of our stack including Spinnaker, CI/CD pipelines, Nginx, TypeScript, React, Node.js, Postgres, SNS/SQS, Kafka, Kubernetes, AWS #LI-HYBRID Our Commitment to Diversity, Equity, and Inclusion We proudly celebrate the unique qualities that make you you, 365 days a year, and not just because it’s the right thing to do or good for business. We embed the principles and practices of diversity, equity, and inclusion (DEI) into all that we do to prioritize people, a Stash core value, and to ensure Stashers of all backgrounds and experiences can be their authentic selves. We are also proud to be the first and only venture-backed fintech to join the CEO Action for Diversity & Inclusion™, and as an Equal Opportunity Employer, Stash is committed to building an inclusive environment for people of all backgrounds. If you require any reasonable accommodations to make your application process more accessible, please reach out to recruiting@Stash.com. Helping You Invest in Yourself Comprehensive total rewards package, comprising compensation (salary and equity) and health care benefits Complimentary subscription to Stash+ account Hybrid Work Policy – We operate a hybrid work environment in NYC that prioritizes time together in the office to strengthen teamwork, innovation, and culture, while still allowing for work-from-home flexibility. Flexible PTO Work-from-home equipment stipends; home internet subsidy Paid Parental Leave (offerings for birth giving and non-birth giving parents) Primary & Secondary Enhanced health and wellness benefits through One Medical, Gympass, and Maven Health External Recognition for Stash Benzinga’s 2023 Best Brokerage for Beginners and Best Robo-Advisor Awards Qorus-Accenture’s 2023 Banking Innovation Awards USA Today and Statista’s 2023 Top 500 Best Financial Advisory Firms Comparably's Best Company Awards: Best Places to Work, Best Company Outlook, and Best Engineering Team for Diversity, Women, Culture, and more! (2023) Fintech Breakthrough Award: Best Personal Finance App (2023) BuiltIn’s Best Places to Work (2022, 2021, 2020, 2019) Forbes Fintech 50 (2021, 2020, 2019) Best Digital Bank, Finovate Awards (2020) Tearsheet Challenge Awards, Best Banking Card Product - Stock-Back® Card, 2020 LendIt Fintech Innovator of the Year (2020, 2019) Salary Range: $129,722 - $193,078 The base salary range represents the reasonably anticipated low and high end of the salary range for this position. Actual salaries will vary and will be based on various factors, such as the candidate’s qualifications, skills, experience and competencies, as well as internal equity and alignment with market data for companies of our size and industry. **No recruiters, please**