Senior Fullstack Engineer

This is a fully remote position, open to applicants in United States.

📋 Description

• Collaborate with the CTO, founders, and executives to develop and expand the mortgage technology platform.

• Design, create, and sustain features across Rails API services, TypeScript/Node services, a GraphQL gateway, and React frontends.

• Manage integrations with LOS systems, mortgage insurance providers, document vendors, and e-signature vendors.

• Oversee data mapping, synchronization, reconciliation, retries, and idempotency.

• Design and enhance asynchronous, multi-step workflows using RabbitMQ, SNS/SQS, Sidekiq, and saga-style orchestration.

• Ensure the correctness and security of the multi-tenant platform.

• Lead technical design via design documents and architecture decision records.

• Identify and mitigate technical debt while enhancing service boundaries, module design, testing, and developer experience.

• Conduct code reviews and set engineering standards.

• Participate in on-call duties, lead incident responses, and implement root-cause solutions.

• Utilize and enhance observability tools and CI/CD processes.

• Investigate escalations reported by lenders and external LOS synchronization issues in collaboration with Customer Support & Success.

• Work with Product Managers to clarify requirements and identify edge cases.

• Collaborate with UI/UX Designers to create polished and accessible interfaces.

• Mentor engineers through pairing, code reviews, design feedback, and AI-assisted workflows.

• Direct AI-assisted engineering utilizing Claude Code, Cursor, and Codex.

• Develop and maintain shared AI tools, agent instruction files, reusable skills and prompts, MCP servers, and automated workflows.

• Establish AI-use guardrails to safeguard secrets and customer data.

⛳️ Requirements

• Over 7 years of experience in building and managing production web applications.

• Extensive knowledge of Ruby on Rails, including API-only services, ActiveRecord, PostgreSQL, background jobs, and RSpec.

• Proficient in delivering UI with React and TypeScript.

• Experience with GraphQL; Apollo is preferred.

• Background in developing distributed, event-driven systems.

• Understanding of retries, idempotency, and eventual consistency.

• Familiarity with third-party integrations, including REST, SOAP, webhooks, and partner APIs.

• Strong instincts for security and multi-tenant data isolation.

• Advanced daily usage of AI and agentic coding tools.

• Capacity to structure context for agents and verify their outputs.

• Ability to compose design documents and clarify production incidents to non-engineers.

• Willingness to engage in on-call duties, incident response, observability, and conduct blameless postmortems.

• Bonus: Experience in mortgage technology or integration-heavy regulated domains.

• Bonus: Familiarity with LOS platforms such as Encompass, MortgageBot, or Byte, or MISMO standards.

• Bonus: Knowledge of Node.js/TypeScript services, Elasticsearch, Redis, Docker, AWS, CI/CD, and saga or workflow orchestration patterns.

• Bonus: Experience in mentoring engineers and leading cross-team initiatives.

🏝️ Benefits

• PTO as required.

• Comprehensive insurance coverage.

• 401(k) matching.

• Stock option grants.

• Stock purchase plan.

• Flexibility to work from the location that suits you best: at home, in an office, or while on the go.