Senior Full-Stack Engineer

About the Company: An established, profitable US-based B2B SaaS company behind a decade-old, revenue-carrying sales-engagement platform (cold email and outreach automation). Small, lean team. This is the most important engineering hire on the product. The Role: You will be a hands-on engineer who owns the platform day to day, end to end: backend services, frontend, AWS infrastructure, production debugging, and third-party integrations. Success in the first six months looks like this: you learn the stack fast, get it quiet by automating the manual work that still runs by hand, and then start building what's next. There is a clean handoff from the departing engineer, who will help you transition. What You'll Own: Own the codebase end to end as the primary engineer: ship features, fix issues, keep production healthy Get the stack quiet in your first weeks by automating the manual processes that still eat time today Root-cause and resolve production incidents in live systems with paying customers: memory and heap issues, third-party API edge cases, queue backups Run deploys and infrastructure changes as routine daily work across the AWS stack Build and run your own AI agent workflows in Claude Code to multiply output across the repo Take specced work, fill the gaps yourself, and deliver real estimates you can hit Scope and build new products from scratch during heavier build cycles What We're Looking For: 8+ years senior full-stack, comfortable being the primary engineer who owns the product end to end and makes the call Senior TypeScript and Node, fluent across both modern frameworks and long-lived legacy codebases Strong, current Angular, and genuinely energized to work in modern Angular. Someone still anchored to Angular 1.x who has no interest in the modern version is not a fit Strong AWS operations as daily work: ECS Fargate, Lambda, SQS, Aurora (MySQL and Postgres), SES, CodePipeline and CodeBuild Strong production debugging in systems with real paying customers Deep daily use of AI coding tools: you work in Claude Code and have built your own agent workflows You come from small or lean-team environments where you owned the whole thing, not big-company siloed teams You build for the love of it and can show what you've built Nice to Have: React Email deliverability: DKIM, DMARC, SPF, warmup, blocklists, sender reputation Mailbox-provider APIs: Gmail API, Microsoft Graph, IMAP and SMTP, OAuth PHP and Laravel, Stripe or billing experience, Linux and Ansible, or a sales-tech / martech background Public open-source work, your own agent or MCP tooling, or an active local dev community you can tap for part-time help Who You Are: You work well with a lot of autonomy: you find problems, fix them, and report back plainly. You have good product instincts, you think about customer impact, you treat billing code with care, and you would rather delete a dead feature than maintain it. You keep an eye on production because you care that it stays healthy. And you make AI tools a core part of how you work. Tools and Stack: TypeScript, Node, Angular, AWS (ECS Fargate, Lambda, SQS, Aurora MySQL and Postgres, SES, CodePipeline, CodeBuild), Claude Code. Details: Location: Remote, Latam Flexible PTO Time Zone: Strong US business-hours overlap (Colombia is already US-aligned) Salary: $60,000–$70,000/year USD Type: Full-time