Senior Full Stack Software Engineer - Payments

Houzz

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Location: Israel
Job Type: full-time
Work Format: 🌍 Remote
Salary: Not specified
Posted: November 1, 2026

Job Description

About the Role

We are looking for a driven, passionate, and self-motivated Full Stack Developer to help drive the future of our AI platform in a fast-paced, high-impact environment. In this role, you will lead end-to-end feature development, architect scalable systems, and collaborate with a talented global team to deliver daily value to thousands of users worldwide.

If you bring a can-do mindset, enjoy tackling complex technical challenges, and thrive on transforming ambitious product visions into real-world impact, we want to hear from you!

Who are we at Houzz Pro?

Houzz Pro is an all-in-one, AI platform for the Build and Design industries. Our solution streamlines business operations for pros of all sizes by centralizing financials, project management, lead tracking, client communication dashboards, and actionable business insights into one unified space.

👉 Learn more about us:

What You’ll Do

End-to-End Ownership: Lead the planning, architecture, and execution of complex full-stack features from initial concept through production deployment.
Cross-Functional Collaboration: Partner closely with Product, UX, and global engineering teams to align technical solutions with business priorities and user needs.
Architectural & System Excellence: Design resilient microservices and backend architectures with an emphasis on data integrity, high availability, and asynchronous processing.
AI-First Workflow: Leverage state-of-the-art AI tooling across the full software development lifecycle—from design and prototyping to implementation, testing, and debugging.
Quality & Performance: Champion engineering best practices through robust unit/integration testing, CI/CD automation, and real-time observability using modern monitoring tools.
Mentorship & Standards: Drive code review standards, elevate engineering practices, and mentor team members across cross-functional projects.

At a Minimum, We’d Like You to Have

5+ years of professional experience in Full Stack software development, building and scaling SaaS applications.
Strong expertise with our core stack: Node.js, React, GraphQL, Microservices architecture, and PostgreSQL (or equivalent relational databases).
Hands-on experience using AI coding tools (e.g., Cursor, Claude Code) to generate, refactor, and test full-stack code.
B.Sc. in Computer Science, Software Engineering, or equivalent.
Solid grasp of service-oriented design patterns, backend asynchronous processing, and relational database design/optimization
Proven track record of designing and building complex, integrated enterprise or SaaS systems.
Proven experience working with AI platforms and integrating AI solutions into production systems.

Ideally, You'll Also Have

Direct experience working on financial software, fintech, online payments, billing/subscription management, or accounting integrations (e.g., Stripe, QuickBooks, Plaid).

Houzz is an Equal Employment Opportunity employer. When applying for a role at Houzz, we guarantee your application will be considered regardless of your sex; race; color; gender; national origin; height or weight; ancestry; physical or mental disability; medical condition; genetic information; marital status; registered domestic partner status; age; sexual orientation; military and veteran status; or any other basis protected by federal, state or local law or ordinance or regulation.

We embrace and celebrate the value that diversity brings to an organization. Diverse backgrounds and different points of view help Houzz provide the best experience for our community. Houzz is committed to fostering an inclusive environment through projects and initiatives, such as employee resource groups, that support Houzzers’ efforts to be themselves and share their lives at work.

If you would like assistance or an accommodation due to a disability, please email us at accommodations@houzz.com. This information will be treated as confidential and used only for determining an appropriate accommodation for the interview process.

Houzz is an Equal Opportunity Employer. M/F/Disability/Veterans

__________________

Be Who You Are and Do What You Love at Houzz

About Houzz

When founders Adi and Alon remodeled their home, they were frustrated by the lack of resources and inspiration to help them articulate a vision and select the right pro to make it a reality.

So they built Houzz.

Houzz is now the leading platform for home remodeling and design, providing an all-in-one software solution for industry professionals and tools for homeowners to update their homes from start to finish. Using Houzz, people can find ideas and inspiration, hire professionals, and shop for products. Houzz Pro (houzz.com/pro) provides home industry professionals with a business management and marketing SaaS solution that helps them to win projects, collaborate with clients and teams, and run their business efficiently and profitably.

Our Mission and Core Values

We're proud to say there's no one quite like us. Houzz is a community-centric, innovative tech company that continues to disrupt the home renovation and design industry. Our mission-driven culture is rooted in our core values, and we’re all here for one purpose: make the home remodeling and design process more fun and productive for everyone.

Our Mission

To create the best experience for home renovation and design.

Our Core Values

We’re a Community

We put our community of Houzzers, industry professionals and homeowners first. We approach our work with care, humility and respect. We deliver value to our community through our products and services.

We Build the Future

We are visionaries who challenge the status quo. We are creative, innovative and curious. We embrace change and different ideas to drive our industry forward.

We Make Things Happen

We are solution-seekers and self-starters. We listen, move fast and empower our teams to deliver extraordinary results and products. We play to win.

By applying for a job with us, you acknowledge and agree to the terms of our Job Applicant Privacy Notice .

#LI-Remote

🎯 Who is this job for?

This role is suitable for a Senior Full Stack Software Engineer with 5+ years of experience building and scaling SaaS applications, particularly in payments, fintech, billing, or financial integrations. Required skills include Node.js, React, GraphQL, microservices, PostgreSQL, asynchronous processing, relational database optimization, AI platform integration, AI coding tools, testing, CI/CD, and observability. The candidate should be experienced in owning complex features end to end, designing resilient systems, integrating payment or accounting services, collaborating cross-functionally, conducting code reviews, and mentoring engineers.

💬 Potential Interview Questions

How would you design a payment microservice using Node.js and PostgreSQL?

I would isolate payment responsibilities behind a well-defined service API, use Stripe or another payment provider for sensitive payment operations, and persist transaction state in PostgreSQL. The service would include idempotency, clear state transitions, retries, audit logs, and asynchronous events for downstream workflows.

How would you ensure payment operations are idempotent?

I would require a client-generated idempotency key for operations such as charges, refunds, and subscription changes. The service would store the key, request fingerprint, result, and status in a transactional table, returning the original result when the same request is retried.

How would you process payment-provider webhooks reliably?

I would verify webhook signatures, persist the event before processing, and enforce uniqueness on the provider event ID. Processing would occur asynchronously through a queue with retry and dead-letter handling, while handlers would be idempotent and able to tolerate out-of-order delivery.

How would you model billing and subscription data in PostgreSQL?

I would separate customers, payment methods, products, plans, subscriptions, invoices, payment attempts, refunds, and provider events into normalized tables. I would maintain immutable financial records where possible, use explicit status histories, and add indexes based on access patterns such as customer, subscription, and transaction status.

How would you design a GraphQL API for payment data?

I would expose domain-focused queries and mutations with strict authorization at the resolver and service layers. Sensitive fields would be minimized, pagination and batching would prevent performance issues, and mutations would return explicit transaction states rather than implying synchronous completion.

How would you prevent race conditions when updating payment or subscription state?

I would use database transactions, row-level locking or optimistic concurrency controls, and a well-defined state machine for valid transitions. Events would include version or sequence information so stale or duplicated updates cannot overwrite newer state.

How would you secure a React and Node.js payments application?

I would avoid handling raw card data whenever possible by using provider-hosted fields or tokenization, and I would enforce TLS, strong authentication, authorization, input validation, and secret management. I would also apply least-privilege access, audit sensitive actions, and avoid logging payment credentials or personally identifiable information.

How would you improve the performance of a PostgreSQL-backed payments system?

I would inspect query plans, add targeted indexes, optimize joins and pagination, and use connection pooling with appropriate limits. For high-volume workloads, I would consider partitioning, read replicas for safe read operations, caching non-sensitive data, and asynchronous processing for expensive tasks.

How would you test a payment feature end to end?

I would combine unit tests for business rules, integration tests against PostgreSQL and provider sandboxes, contract tests for GraphQL and webhook payloads, and end-to-end tests covering successful, failed, duplicated, and delayed payments. Tests would also verify retries, authorization boundaries, transactional consistency, and reconciliation behavior.

How would you use observability to operate payment services in production?

I would implement structured logs, distributed traces, and metrics for authorization rates, failure categories, webhook lag, retry counts, processing latency, and reconciliation discrepancies. Alerts should focus on actionable symptoms, while dashboards and correlation IDs should make it possible to trace a payment across the frontend, services, database, queue, and provider.

📋 Job Summary

Houzz Pro is an all-in-one AI-powered SaaS platform helping home renovation and design professionals manage projects, finances, leads, and client relationships. As a Senior Full Stack Software Engineer – Payments, you’ll own end-to-end feature development, design resilient microservices, improve payment and financial workflows, and mentor engineers using Node.js, React, GraphQL, PostgreSQL, and asynchronous processing. This is a full-time, fully remote role in Israel; salary is not disclosed, but the opportunity offers high-impact ownership, AI-first development, global collaboration, and the chance to shape tools used by thousands of professionals worldwide.