Senior Full Stack Software Engineer - Remote in US at Knock
Senior Full Stack Software Engineer
👋 As a Senior Software Engineer, you will play a key role in developing the technology that powers Knock.com and the platforms supporting our customers, partners, and internal teams. Your contributions will directly impact our ability to deliver a seamless, world-class experience.
This position is primarily backend-focused but requires strong expertise across the full stack.
What You’ll Do:
✅ Design, develop, and maintain backend services, APIs, and data pipelines that power Knock's customer-facing and internal applications — with occasional frontend contributions to support full-stack delivery when needed.
✅ Architect and build scalable backend services using Node.js and TypeScript that power Knock's customer-facing and internal applications, ensuring they integrate seamlessly with our frontend experiences.
✅ Own end-to-end delivery of complex integration projects, including third-party lending systems and RESTful/RPC APIs, ensuring robust data synchronization, error handling, and seamless service-to-service communication.
✅ Own end-to-end delivery of complex integration projects, such as connecting our platform with third-party lending systems, ensuring robust data synchronization and error handling
✅ Contribute to AI-powered features and initiatives, integrating AI services (such as LLMs or ML APIs) to enhance our risk analysis and decision-making capabilities.
✅ Collaborate with engineers, product managers, designers, and business partners to create innovative, impactful technology solutions that deliver excellent user experiences.
✅ Champion best practices in architecture, security, testing, monitoring, and deployment to ensure our applications are scalable, secure, and reliable throughout the development lifecycle.
✅ Provide mentorship, share knowledge, and take initiative on technical challenges — exploring new tools and approaches to support your team across backend architecture, integrations, infrastructure, and beyond.
✅ Take initiative on technical challenges, explore new tools and approaches, and support your team wherever your skills can contribute most — from backend architecture and integrations to infrastructure improvements and occasional frontend work.
✅ Join a rotating on-call schedule, helping ensure system reliability and rapid response when needed.
What You Bring:
At least 5 years of experience building production-grade software, with at least 3 years writing production-level Node.js code using modern frameworks like Fastify or Express.
Backend expertise using TypeScript and Node.js (required) — proven ability to design and implement scalable RESTful and/or RPC-style APIs, integrate with complex third-party systems, and handle data synchronization challenges, API versioning, and error scenarios. Experience with GraphQL is a plus.
Experience integrating AI/ML services into production applications — such as LLM integration (OpenAI, Anthropic), prompt engineering, or building features that leverage AI for ranking, scoring, or decision support (highly desired).
Product-minded engineering approach — comfortable working with ambiguous requirements, making pragmatic scope decisions, and designing solutions that truly solve user problems, not just implementing specifications.
Can contribute to frontend work when needed — comfortable reading and making changes to React/Next.js codebases, even if frontend development isn't your primary focus.
Database proficiency — solid experience with RDBMS and SQL (MySQL or PostgreSQL), including database design, writing and optimizing queries.
Solid understanding of software engineering fundamentals and experience across the full development lifecycle — including requirements gathering, development, testing, deployment, instrumentation, monitoring, and ongoing maintenance.
Cloud infrastructure experience — familiarity with at least one major cloud provider (AWS preferred) and hands-on experience with services like ECS, RDS, Lambda, S3, CloudWatch, plus CI/CD pipelines and application performance monitoring tools.
Belief in creating diverse, equitable, and inclusive practices and programs that will further Knock's commitment to making an impact, learning, putting people first, being open, and courageous.
Proven success working 100% remote in prior positions & experience working with a distributed, national team.
We encourage you to apply even if you don't have every listed requirement.
🖥️ Physical Requirements
Set up and constantly operate a computer
Communicate and exchange accurate information to others via telephone or internet video applications
The candidate must be able to perform the essential functions of the job, with or without reasonable accommodation.
💵 Compensation and Benefits
Our Compensation Philosophy: As a fully remote (U.S.-based) workforce, our goal is to ensure that all Knockstars are fairly compensated.
Please note that the salary range information that follows is a good faith estimate for this position: $156,000 - $185,000 USD.
This job posting expires on March 31,2026.