Full Stack Engineer

ClassWallet a leading financial technology company in the United States serving agencies delegated responsibility to manage public funds is seeking to hire a Full Stack Engineer to join our team.

Agencies use ClassWallet to get public funds to the right people and ensure the funds are used for the right purpose. ClassWallet's suite of products and services empowers agency administrators to dramatically increase efficiency of funds distribution and spend compliance reduce programmatic costs maximize the full potential impact of the program and satisfy the needs and expectations of policymakers constituents and public reporting. ClassWallet has processed over $6.7 Billion to date and serves public agencies across 39 states. In its 11+ years in operation ClassWallet has completed over 12M transactions funded 1.1M recipients processed over 5M applications and now serves 300+ state and local agency clients supported by a team of 280+ full-time staff.

The Company has developed an industry-defining digital wallet solution which has gained rapid traction among state and local agencies and school districts across America. ClassWallet ranks as the 61st fastest growing software company on the prestigious Inc. 5000 list of fastest-growing private companies and the 21st fastest growing financial technology company on the Deloitte Technology Fast 500 in 2023.

While the Company delivers immense business value the social impact of ClassWallet is a fabric that runs through its mission and corporate culture. As a result of ClassWallet’s innovation public programs run with exponentially more efficiency and the impact and breadth of the programs for the individuals they serve is dramatically higher. This mission compliments the Company mission-based culture with focus on gratitude and work-life balance.

About the Role

We're modernizing a large business-critical fintech platform. Our current system is a mature Node.js/Express + MongoDB backend (with RabbitMQ workers batch jobs and a reports service) paired with a tri-generational frontend — layers of Backbone/Marionette legacy React class components and a React + Redux + Material-UI app all coexisting in one codebase.

We're looking for someone with the judgment to tell good patterns from bad ones — who can recognize where the legacy system went wrong avoid repeating those mistakes in new work and design scalable solutions that still have to live alongside a rigid established system. You'll contribute to new NestJS services and Next.js UI write tests and ship changes that respect the constraints around you — using AI tooling (Claude Code Copilot) as a force multiplier not a crutch.

What you'll do

• Work across the full stack — data model API contract UI and production behavior — contributing to domains as they move onto the modern stack.
• Recognize bad legacy patterns and don't repeat them — read the existing Express/MongoDB and Backbone/React layers understand where they fell short and apply better practices in new development rather than carrying old habits forward.
• Design for scale within real constraints — build solutions that scale even when they have to integrate with a rigid legacy system that can't be changed wholesale.
• Build on the modern stack — NestJS modules (DI guards interceptors) and Next.js apps (App Router server components typed clients).
• Understand the strangler-fig approach — how legacy and new run side by side behind feature flags with zero data loss and no downtime — and contribute to it without disrupting it.
• Model relational data carefully — help move money-bearing/transactional data from documents into a normalized SQL schema with real constraints and safe migrations.
• Write tests as a default — unit integration E2E. The suite is what lets the team move fast safely.
• Spot and flag problems — the flaky test the N+1 the missing index. Raise them clearly so they get prioritized and pick them up when it makes sense.
• Use AI tooling efficiently while understanding and standing behind every line that lands.

• 4+ years shipping production full-stack
• Strong TypeScript front and back
• NestJS (or deep Express/Fastify w/ DI grasp)
• Next.js/React (hooks App Router SSR/CSR)
• PostgreSQL or MySQL (schema indexing transactions migrations)
• An eye for distinguishing good patterns from bad legacy ones
• Ability to design scalable solutions that fit within an existing rigid system
• Testing discipline (Jest Playwright/Cypress Supertest)
• API design (REST auth backward-compatible evolution)

Bonus:

• Experience migrating off a legacy code
• Fintech/payments/ledger
• Message queues (RabbitMQ/SQS/Kafka)
• MongoDB/Mongoose Aggregation
• AWS/Docker/Kubernetes/CI
• Deliberate AI-agent use in production workflows

Who you are:

• Takes ownership and responsibility for their work
• Eager to take initiative and grow
• Has the judgment to spot bad legacy code and the discipline to not repeat it in new work
• Designs for scale even inside rigid constraints
• Refactors and builds with better practices rather than carrying old patterns forward
• Moves carefully without breaking trust (tests + small PRs + flags)
• Communicates trade-offs clearly
• Raises issues and flags risks rather than routing around them

Our stack:

• Today: Node · Express · MongoDB · RabbitMQ · React/Redux · Backbone · Material-UI · AWS · Jest
• Going: NestJS · Next.js · TypeScript end-to-end · PostgreSQL/MySQL · full automated coverage

ClassWallet is a positive family-oriented team environment. Our focus is on encouragement positive reinforcement and gratitude. We work hard and are highly motivated to win but with a healthy perspective on life.

We offer an excellent salary and benefits commensurate with experience.

ClassWallet.com is proud to be an Equal Opportunity Employer. Applicants are considered for all positions without regard to race color religion sex national origin age disability sexual orientation marital or veteran status.

What We Do

We recently updated our Vision and Values as we are more than simply a technology. In our evolved Vision statement we now emphasize the word "integrity" as we know it is the combination of technology and PEOPLE that truly sets us apart. Our clients look good because their citizens are better served using our platform and processes that include real people supporting the effort. A notable addition to our Values is that "we care deeply about the people we serve" further emphasizing the Mission and how we approach the day-to-day. Our Values are used to make difficult business decisions. They are not simply slogans but expectations interwoven into the fabric of the culture. A pioneer in financial and government technology ClassWallet's technology is used by public agencies across 35 states to maximize the positive impact of public funding on people’s lives. Since 2014 the ClassWallet platform has been used to deliver more than $4 billion in public funds to millions of citizens and has helped clients achieve the highest standards of program integrity and efficiency. With customer loyalty and satisfaction exceeding some of the world's largest brands ClassWallet was recognized by J.D. Power in 2024 for providing "An Outstanding Customer Service Experience" for Phone Support. ClassWallet is headquartered in Hollywood Florida and ranks as the 88th fastest-growing software company on the prestigious Inc. 5000 list.

Why Work With Us

From ClassWallet’s Founder and Executive Chairman to every member of the leadership team our culture of authenticity is a foundational value for all. This fundamental philosophy guides interactions with each other and our clients and customers.

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