Top Tech Jobs & Startup Jobs in Los Angeles, CA

Join as the founding full-stack engineer to extend a TypeScript React/Next.js prototype, design product features, integrate AI/OCR, write tests and infrastructure, talk to users, and iterate quickly to drive growth.

Lead and mentor a team of engineers while contributing hands-on to complex features. Define architecture, drive development best practices, conduct code reviews, coordinate cross-functional requirements, and ensure timely delivery of high-quality ecommerce marketplace software.

Build and maintain clean, user-friendly React Native screens and components for iOS and Android. Implement UI/UX from provided designs, integrate APIs, collaborate with backend and AI teams, fix bugs, and keep the codebase organized.

Edit provided footage into clean, engaging videos and create simple graphics. Post consistently, maintain an authentic Muslim-inspired style, collaborate with the team, and accept feedback.

Design, train, and deploy ML models for Qur'ān recitation, tajwīd detection, and ASR. Build data pipelines for cleaning, segmentation, labeling, and evaluation. Integrate real-time predictions via APIs or lightweight on-device inference, optimize models for speed and mobile performance, and collaborate with backend developers to ship AI features in the app.

Volunteer administrative assistant to support organizational workflows: coordinate across teams, prepare presentations and reports, support internal communications, and assist with ad-hoc support tasks to advance the nonprofit's mission.

Volunteer role to identify and evaluate foundation, corporate, and government grant opportunities; track eligibility, deadlines, and recurring opportunities; maintain a database and present summarized recommendations.

Lead Hasana's marketing and communications as a volunteer: manage social media and digital communications, create content (posts, flyers), support event and fundraising marketing, track engagement and refine strategies, and maintain consistent, professional messaging.

Research Fellows will validate AI-generated paper reproductions, simulations, and results; map research taxonomies; define standards for high-quality AI-assisted science; and create benchmark tasks and evaluations for frontier AI models. Fellows will contribute to a publicly released benchmark paper and open evaluation set as lead or first authors. The contract offers flexible, remote global work for current STEM PhD students or postdocs with published research and hands-on AI agent experience.

Lead organic social strategy and execution across eight D2C consumer brands. Manage channel strategies, content calendars, audience engagement, UGC sourcing, customer storytelling, performance reporting, optimization, and AI-enabled workflows. Partner with Content, Community, Growth, Customer Experience, and Marketing teams while mentoring social media coordinators and maintaining distinct brand voices across Instagram, Facebook, TikTok, YouTube, and other platforms.

Lead top-line revenue growth through rapid Go-To-Market experimentation across paid channels, viral and AI-driven growth tactics. Own Google and Facebook paid campaigns, collaborate with sales, deploy sales and AI tools, analyze performance, and iterate quickly in a fast-paced startup environment.

Sell heyLibby AI agent to fitness, wellness, and recreation businesses. Qualify inbound leads, prospect and cold call, manage pipeline in a CRM, demo value, close deals, and refine sales strategy with the executive team.

Architect, build, and maintain scalable full‑stack applications using React, TypeScript, Node.js, and AWS. Own features end-to-end, optimize performance and usability, collaborate with founders, and use AI tools to accelerate development in a fast-paced startup.

Design and build scalable backend systems, data pipelines, and cloud infrastructure. Own CI/CD, containerization, databases, and reliability; collaborate with tech leads to deliver secure, production-grade solutions for startups in a fully remote environment.

Design, develop, customize and maintain enterprise Sitecore solutions (versions 9/10, SXA, JSS, XM Cloud). Produce technical specs, implement components, test and debug in test and production, support teammates, perform demos to customers, and escalate/resolve issues.

Review, label, and QA datasets for AI/ML training; maintain trackers, databases, and dashboards; follow annotation guidelines and SOPs; prepare and clean data; document processes; collaborate to resolve data queries while ensuring confidentiality and timely delivery.