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# Senior Software Engineer (Full Stack)

- **Company:** Rec Technologies
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Salary:** $150,000 - $200,000
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Amazon Web Services, Data Analysis, Code Generation, Code Review, Cursor, Software Debugging, PostgreSQL, Microsoft Software, Node.Js, Next.js, Software Construction, Software Engineering, Twilio, TypeScript, ReactJS, Claude Code, Backend, Front End Software Development
- **Published:** November 14, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-software-engineer-full-stack-san-francisco-ca--a521d8b4-5284-4df1-9ed3-efa127f580d8

## About the Role

Software Engineering, Recreation, Artificial Intelligence (AI), Microsoft Product Family, Team Lead/Manager, Financial Transactions, Billing, Facilities Management, Customer Relations, Coaching, * 5+ years of experience building software in collaborative environments.

 * Youre fired up by the mission. We work hard because recreation matters to families, coaches, and kids across the country. We also ski, hike, and get outside. Were building for recreation, after all.
 * AI fluency is non-negotiable. You already use AI tools daily and have real judgment about when to trust them, when to verify, and when to override. If AI tools arent yet core to how you work, this role will be a rough fit.
 * You ship with quality. Fast, clean, and proud, but never careless. Every customer transaction matters to us: a missed swim lesson registration, a double-booked court, a failed payment. Reliability is the baseline.
 * Product judgment is part of the job. You dont just follow orders. You think critically about what to build, what to defer, and what to push back on. You ask "should we?" before "how do we?"
 * You thrive in ambiguity. Early-stage problems are rarely well-defined. You bring order without over-engineering, and you know the difference between clarifying a spec and getting stuck on one.
 * You work like a partner, not just a coder. You think end-to-end alongside Product, Design, and Partner Success.
 * You communicate clearly, candidly, and constructively. Strong opinions, loosely held, with a bias toward what works.

Our Stack

 * Frontend: Next.js (hosted on Vercel), React, TypeScript
 * Backend: Node.js, Koa, Objection.js, PostgreSQL
 * Infra & Ops: AWS, Temporal, Twilio
 * AI & Tooling: AI proficiency is mandatory here, not optional. Every engineer uses AI tools daily, for code generation and review, for operational work via MCP servers and tool use, and for data analysis. We expect you to already be fluent with tools like Claude Code, Cursor, or equivalent, and to have strong judgment about when to lean on AI and when to override it.

## Description

This is not a seat-filling role. Were a Series A company in scaling mode, adding new partners and users every day, and every engineer we hire shapes what Rec becomes.

As a senior engineer, youll own meaningful surface area across our product. That might mean facility management (reservations, permitting, invoicing), program management (camps, classes, lessons, eligibility), or payments and platform (payments, financial transactions, accounting, reporting). Wherever you land, youll work end to end, from consumer-facing booking flows, to staff tools for coaches and administrators, to the systems that keep parks humming behind the scenes.

Youll make architectural decisions, influence the roadmap, and help us build something the recreation industry has been waiting decades for.

What Youll Own

 * Partner closely with Engineering, Product, Design, and Partner Success to shape strategy and drive products from idea to launch, and beyond.
 * Build and maintain the core platform powering everything from booking experiences to staff tools to municipal dashboards.
 * Write clean, reliable, maintainable code. Elevate the bar through thoughtful reviews and technical mentorship.
 * Use AI tools fluently across your workflow, from scaffolding and code review to debugging production issues and analyzing data.
 * Invest in the foundation. Make smart, forward-thinking decisions that keep our platform nimble and scalable as we grow.