Senior Software Engineer

Keystone Bookkeepers

Senior engineer owning AI-first internal and client-facing software for a bookkeeping and accounting firm. Operating secure, multi-tenant financial systems and integrations end to end.

Posted 8/6/2026full-timeRemote • 🇵🇭 PhilippinesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in full-stack development with a strong focus on JavaScript/TypeScript, React, and Node.js, while ensuring production reliability and security for software handling sensitive data. Proficient in integrating AI tools and managing third-party systems, with a solid understanding of database design and performance optimization.

Highest-signal resume keywords

Full-Stack DevelopmentJavaScript/TypeScript ProficiencyNode.js/Serverless Backend ExperienceAI-First Development with Claude CodeProduction System Ownership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScriptTypeScriptReactNode.jsSQLPostgreSQLREST APIsOAuth 2.0DockerAI Development

Soft Skills

Incident ResponseCritical Code ReviewCollaborationProblem-SolvingCommunication

Tools & Technologies

QuickBooks OnlineMicrosoft GraphBill.comViteTailwind CSSVercel Serverless FunctionsSupabaseAzureGCPAWS

Industry Keywords

FintechAccounting SoftwareProperty Management SoftwareSOC 2 ComplianceMulti-Tenant Data Isolation

Tech Stack

Tools & technologies

AWSAzureDockerERPGoogle Cloud PlatformJavaScriptNode.jsPostgresPythonReactSDLCSQLTypeScript

About the role

Key responsibilities & impact

Own production reliability during North American business hours and act as the first responder for issues
Deliver features end to end across the internal operations platform and client-facing portal
Maintain integration health across QuickBooks Online, Microsoft Graph, Bill.com, property management platforms, and CRM systems
Own the security posture of shipped software with explicit acceptance criteria
Design, develop, test, deploy, and maintain scalable web applications and backend services
Build AI-enabled features and integrate LLM APIs for document extraction, classification, review workflows, and agent-driven automation
Use AI development tools such as Claude Code as part of the daily engineering workflow
Build and maintain REST APIs, serverless functions, background workers, scheduled jobs, and webhook ingestion pipelines
Own database schema design, migrations with tested rollback paths, and query performance
Triage and resolve production incidents across application, database, and third-party integration layers
Instrument systems with structured logging, alerting, and monitoring for authentication failures, integrations, queues, and background jobs
Write runbooks for recurring problems
Extend existing codebases without unnecessary rewrites
Write maintainable, documented code and participate in code reviews
Translate technical risks and tradeoffs into business terms for leadership and operations staff
Work with an existing Philippines-based engineer and an external development partner
Provide consistent coverage from 11:00 AM–7:00 PM ET, Monday through Friday
During the first 90 days, absorb the escalation load, establish alerting and backup verification, and take ownership of a significant workstream

Requirements

What you’ll need

Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience
Senior-level full-stack experience with a demonstrable record of shipping and operating production software
Strong proficiency in JavaScript/TypeScript and React
Experience developing Node.js/serverless backends
Familiarity with Vite, Tailwind CSS, Vercel Serverless Functions, and Supabase/PostgreSQL highly desirable
Solid SQL/PostgreSQL experience including data modeling, indexing, query performance, and migrations
Experience with REST APIs, webhooks, and third-party integrations
Experience with Git, testing, CI/CD, and collaborative development workflows
Genuine AI-first development experience using Claude Code or comparable AI coding agents on shipped projects
Ability to critically review AI-generated code, especially code handling money or sensitive data
Production system ownership, including incident response, rollback or fixes, and follow-up improvements
Experience inheriting and extending another person’s codebase
Experience setting up alerting and logging
Experience with software handling sensitive financial or regulated data
Working knowledge of multi-tenant data isolation, PostgreSQL row-level security, scoped request context, and server-side authorization
OAuth 2.0 integration experience with token refresh, expiry/revocation handling, and encrypted credential storage
Secure document handling, access auditing, and protection against leaked signed URLs
Secure SDLC fundamentals including input validation, IDOR prevention, secrets hygiene, and dependency vulnerability triage
Docker in production, including multi-stage builds, deploys, and rollback strategy
Hands-on experience with Azure, GCP, or AWS
Personal experience restoring PostgreSQL from backup
Ability to read and modify reverse proxy configuration and manage TLS certificate renewal
Consistent availability 11:00 AM–7:00 PM ET, Monday through Friday; schedule is not flexible
Preferred: accounting, bookkeeping, fintech, or property management software experience
Preferred: QuickBooks Online or comparable accounting/ERP integration experience
Preferred: Anthropic Claude API or OpenAI API experience
Preferred: deep Claude Code familiarity
Preferred: Python proficiency
Preferred: scheduled jobs, cron workflows, GitHub Actions, or other background processing systems
Preferred: threat modeling, access logging, or data retention policy experience
Preferred: SOC 2 or similar compliance environment experience
Preferred: distributed remote-team experience across multiple time zones

Benefits

Comp & perks

Competitive salary and benefits
Significant ownership and a direct line to the founder — no layers between you and the decision
A collaborative, remote-first environment across three regions
The opportunity to build modern AI-powered software with current tooling, and to decide how it gets built
Meaningful technical problems: multi-tenant financial data, accounting integrations, and AI-assisted workflows that replace genuine manual effort
Ongoing professional development and continuous learning