Senior Software Engineer

Keystone Bookkeepers

Senior software engineer owning AI-first internal and client-facing tools for Keystone Bookkeepers, an accounting firm serving short-term rental operators. Operating production systems, integrations, and sensitive financial data.

Posted 8/6/2026full-timeRemote • 💃 Anywhere in Latin AmericaSenior💰 $2,500 - $3,000 per monthWebsite

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 applications handling sensitive data. Proficient in integrating AI tools and managing third-party APIs, with a solid understanding of database management and operational workflows.

Highest-signal resume keywords

Full-Stack DevelopmentJavaScript/TypeScript ProficiencyNode.js Backend DevelopmentREST API DevelopmentProduction Ownership Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScriptTypeScriptReactNode.jsSQLPostgreSQLREST APIsDockerAI DevelopmentOAuth 2.0

Soft Skills

Problem-SolvingCollaborationCommunication

Tools & Technologies

GitCI/CDClaude CodeAzureGCPAWSQuickBooks OnlineVercel Serverless FunctionsSupabaseTailwind CSS

Industry Keywords

FintechAccounting SoftwareProperty Management SoftwareSOC 2 ComplianceSecure SDLC

Tech Stack

Tools & technologies

AWSAzureDockerERPGoogle Cloud PlatformJavaScriptNode.jsPostgresPythonReactSDLCSQLTypeScript

About the role

Key responsibilities & impact

Own production reliability during North American business hours and serve as the first responder for issues
Deliver features end to end across the internal operations platform and client-facing portal
Own integration health across QuickBooks Online, Microsoft Graph, Bill.com, property management platforms, and CRM systems
Own the security posture and define explicit security 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 applications, databases, and third-party integrations
Instrument systems with structured logging, alerting, and monitoring for authentication failures, integration failures, queues, and background jobs
Write and maintain operational runbooks
Extend and modify 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 alongside an engineer based in the Philippines and an external development partner
Take ownership of the afternoon issue queue, triage the bug backlog, and document recurring failures during the first 30 days
Implement alerting, verify backup restoration, and establish post-deploy verification during days 31–60
Own a significant workstream and ship a meaningful feature end to end during days 61–90

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 and serverless backends
Solid SQL/PostgreSQL experience, including data modeling, indexing, query performance, and migrations
Experience with REST APIs, webhooks, and third-party integrations
Experience handling provider API changes and failure modes
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 effectively prompt, intervene in, and critically review AI-generated code, especially code handling money or sensitive data
Production ownership experience, including diagnosing incidents, rolling back or shipping fixes, and closing gaps afterward
Experience inheriting and extending another person's codebase
Experience setting up alerting and logging
Experience building or maintaining 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, including token refresh, expiry and revocation handling, and encrypted credential storage
Secure document handling experience, including access-controlled storage and access auditing
Knowledge of secure SDLC fundamentals, input validation, IDOR prevention, secrets hygiene, and dependency vulnerability triage
Docker production experience, including multi-stage builds, deployments, and rollback strategy
Hands-on experience with Azure, GCP, or AWS
Experience restoring a PostgreSQL database from backup
Ability to modify reverse proxy configuration and manage TLS certificate renewal
Consistent availability from 11:00 AM–7:00 PM ET Monday through Friday
Familiarity with React, Vite, Tailwind CSS, Vercel Serverless Functions, and Supabase/PostgreSQL is highly desirable
Preferred domain experience in accounting, bookkeeping, fintech, or property management software
Preferred experience with QuickBooks Online or comparable accounting/ERP platforms
Preferred experience with Anthropic Claude API or OpenAI API
Deep familiarity with Claude Code specifically is preferred
Python proficiency for automation, data synchronization, and background processing is preferred
Experience with scheduled jobs, cron workflows, GitHub Actions, or other background processing systems is preferred
Exposure to threat modeling, access logging, or data retention policy work is preferred
SOC 2 or similar compliance-minded environment experience is preferred
Experience working in distributed remote teams across time zones is preferred

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
Ongoing professional development and continuous learning