Senior Fullstack Engineer

Stashinvest; New York (NY); Hybrid; USD 170,000 - 190,000; Full time

Benefits offered by this job

Hybrid work in NYC

Total rewards: salary + equity

Flexible PTO

Home office stipend

Parental Leave

Wellness benefits

Job summary

Stash is seeking a Senior Fullstack Engineer to lead the StashWorks B2B product. You will own projects across onboarding, eligibility, enrollment, identity, integrations, lifecycle communications, and operational tooling.

You’ll work with AI coding assistants to architect and implement services, own deployments, and scale infrastructure for a growing customer base. Hybrid NYC-based work with strong cross-functional collaboration is expected.

Qualifications

• 4–7 years of professional software experience.
• Hands-on with AI tools as a core part of daily workflows.
• Successful across services and codebases.
• Writes pragmatic, maintainable Go code.
• Experience designing APIs and integrating external systems.
• Understands production operations, observability, security, and reliability.

Responsibilities

• 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.

Skills

Go (Golang)

AI tools

API design

Observability

Security

Team collaboration

Tools

Spinnaker

CI/CD pipelines

Nginx

TypeScript

React

Node.js

Postgres

SNS/SQS

AWS

Consul

Job description

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 emerging B2B distribution channel that connects employees of partner companies with Stash products and benefits. You’ll join a small, highly collaborative team building and scaling the platform from the ground up.

You’ll own projects across partner onboarding, employee eligibility and enrollment, identity and authentication, third‑party integrations, lifecycle communications, and the operational tools needed to support employer partners.

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
• Thrives in ambiguous, early‑stage environments
• Can move comfortably across services and codebases
• Writes pragmatic, maintainable Go
• Has experience designing APIs and integrating external systems
• Understands production operations, observability, security, and reliability
• Works effectively with product, operations, marketing, and partner-facing teams
• Balances shipping quickly with building systems that can scale

Gold Stars:

• Experience building applications at scale
• Familiarity with or interest in 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, 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 [e-mail].

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: $170,000 - $190,000

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