S3 Jobs - December 2025
Search by company, role, stack, location, salary signal, source, and work setup.
Save this search
Turn the current filters into an email alert.
Log in to save filtered searches as alerts.
-
Twing.AI
AI/Full-Stack Engineer
Posted 6 months, 3 weeks ago
Lean (4-person, 3 engineers) bootstrapped startup building a private-equity automation platform (deal analysis, document processing, chat, investment theme research). Hiring AI/Full-Stack and Forward Deployed Engineers. Responsibilities include owning feature…
Tech stack
Location
Remote (US-friendly timezones), NYC
Compensation
No salary disclosed. Role is full-time or part-time. Benefits/attractions: small, bootstrapped team with direct ownership of core product, zero bureaucracy, greenfield decision-making, rapid learning, and shipping weekly to paying users.
-
BuildBetter
Senior Engineer (Full-stack)
Posted 6 months, 3 weeks ago
BuildBetter is an AI-first product operations platform for customer-led teams. Hiring two senior engineers to own product development end-to-end, solve scalability and AI adoption challenges, build rich frontend experiences, agent and workflow systems, and ex…
Location
Remote (US)
Compensation
170-200k base + equity; visa sponsorship not provided. Benefits: unlimited PTO, $100/mo education stipend, flexible hours, health insurance. Company aims to be in the 95th percentile of equity compensation.
-
Ledgebrook
Engineering Manager
Posted 7 months, 2 weeks ago
Ledgebrook is a tech-enabled E&S MGA modernizing specialty insurance using AI and data-driven underwriting, pricing, and risk selection. Hiring multiple full-time remote roles across Engineering, Data, IT/Security, and Product. Stack and responsibilities vary…
Roles
Tech stack
Location
Remote (US, Canada, Poland)
Compensation
Competitive compensation plus equity; medical, dental, vision; PTO; remote-first with periodic team onsites. Visa sponsorship not available.
-
BuildBetter
Senior Engineer (Full-stack)
Posted 7 months, 2 weeks ago
BuildBetter is an AI-first product operations platform used by customers like Rappi, n8n, and Posthog. Hiring two senior engineers (backend and full-stack) to own features end-to-end, work on scalable performance, rich frontend experiences, agent and workflow…
Location
Remote (US)
Compensation
170-200k base + equity; visa sponsorship not provided. Benefits: unlimited PTO, $100/mo education stipend, flexible hours, health insurance. Company aims to be in the 95th percentile of equity compensation.
-
Lara Health
Senior Back-end Engineer
Posted 7 months, 2 weeks ago
Lara Health is on a mission to transform how healthcare is delivered for chronic care management. We enhance patient care, improve operational efficiency, and create new, diverse revenue streams for healthcare organizations. We are looking for leaders, self-s…
Roles
Tech stack
Location
USA, REMOTE
-
Goodchat
Full Stack Developer
Posted 8 months, 1 week ago
We’re automating chat and monetization in a $150B+ creator economy. Outperforming the best chatters on OnlyFans by 4.5× more tips, all that with zero creator labor. Work remote with occasional meet ups in person. We build 6d/week, 10–12 hours/d. Whatever you …
Roles
Location
USA
Compensation
€100-125K base salary + equity