Find the Best API Jobs in Walnut Creek, CA
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Check out a sample of the 22 API jobs posted on Upwork
AI powered logistics platform [MVP]
Fixed-price ‐ Posted 3 days agoFixed-price
Experience level
We are looking for an experienced full-stack team or senior developer to design, build, and deploy an AI-powered logistics platform for…
MLOps Engineer with LLM, Python, GCP/Vertex AI, and Backend API E…
Hourly ‐ Renewed 28 days agoHours needed
Duration
Experience level
We are looking for a strong MLOps Engineer / AI Systems Engineer to join our team full-time on a long-term basis. The ideal candidate s…
Help Building AI-Platform System - Full Stack Software Engineer/M…
Hourly ‐ Posted 18 days agoHours needed
Duration
Experience level
Project: Seeking a motivated candidate or ai agency. Professional will assist in designing and coding Full Stack MVP, a Cross-domain Pl…
Fractional CTO — Technology Stack Audit & Zendesk Evaluation
Hourly ‐ Posted 6 days agoHours needed
Duration
Experience level
We are a growth-stage, multi-entity home services company operating across Northern California with a team of 60+ and three business en…
Senior Backend / Full-Stack Next.js Engineer - Tourism Platform
Hourly ‐ Posted 5 days agoHours needed
Duration
Experience level
We are building a new public-sector tourism platform on Next.js 16 App Router, TypeScript strict, and Postgres/Neon. This role owns the…
Founding AI Infrastructure Architect (Finance + Multi-Agent Syste…
Hourly ‐ Posted 1 month agoHours needed
Duration
Experience level
Here’s a strong Upwork posting that filters for exactly the type of builder Titan needs — high-conviction, systems-first, deep AI + fin…
Build SaaS based CRM Web Application
Fixed-price ‐ Posted 23 days agoFixed-price
Experience level
We are looking for an experienced web developer or team to build a Web based CRM application for managing customers, leads, tasks, and…
Full Stack Developer with AI Experience
Hourly ‐ Posted 25 days agoHours needed
Duration
Experience level
We are seeking a Full Stack Developer with strong front-end and back-end skills, complemented by AI engineer experience. The ideal cand…
Full Stack Developer for API Aggregation Dashboard
Hourly ‐ Posted 1 month agoHours needed
Duration
Experience level
Project Overview I'm building a web application that pulls real-time data from multiple third-party APIs, normalizes it, and displays…
n8n & GoHighLevel API Developer for Email Template Integration
Fixed-price ‐ Posted 7 months agoFixed-price
Experience level
We are seeking an experienced automation developer to integrate our n8n workflow with GoHighLevel's email template system. The project…
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