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Ikuto

Senior Full Stack Engineer - React/TypeScript/Node - AI Product (San Francisco B

Ikuto, San Francisco, California, United States, 94110

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Senior Full-Stack Engineer

High-Growth AI SaaS Startup SoMa, San Francisco, CA |

Full-Time | Onsite Salary: $200K$300K + Meaningful Equity (1%+)

Join an early-stage AI SaaS startup building an

application builder

that empowers business users to create custom applications where humans and AI collaborate seamlessly across enterprise workflows. Youll play a pivotal role in shaping

core architecture, product development, and first production deployments , working directly with the founder and early team. About the Role

Were seeking a

Senior Full-Stack Engineer

to lead product development and own major product surfaces across

frontend, backend, and integration layers . This is a high-impact role where youll directly influence product direction and help build the foundation for Lumenas platform.

What Youll Do Design and build the

core application builder

the orchestration layer connecting workflows, agents, and front-end views. Develop and scale Lumenas

TypeScript-based backend

and modern frontend stack ( React + Tailwind ). Build dynamic

frontend interfaces

for dashboards, forms, and human-AI workflows. Collaborate with the applied engineering team to integrate

automation and intelligence

across systems. Shape and maintain the

integration layer

connecting REST APIs, SQL sources, and third-party systems. Define and enforce

best practices

for product engineering, architecture, and developer experience as the company scales.

Who You Are (Must-Haves) 515 years of professional software engineering experience in full-stack development. Prior experience working in

early-stage startups

or high-growth environments. Strong proficiency with

TypeScript, Node.js , and modern frontend frameworks ( React ,

Tailwind ). Experience designing

complex architectures , asynchronous workflows, and integrations. Excellent problem-solving, collaboration, and communication skills.

Nice-to-Haves Experience building or integrating

AI / LLM-powered applications . Familiarity with orchestration/workflow frameworks such as

Temporal . Exposure to cloud platforms (AWS/GCP/Azure), containerisation, Kubernetes, and CI/CD pipelines. Experience with enterprise-grade concerns: secure hosting (VPCs), observability, identity & compliance.

Why Join? Competitive

salary: $200K$300K

+

meaningful equity (1%+)

in an early-stage company. Work directly with

experienced founders

and influence the product roadmap. Shape the architecture and direction of a

high-impact platform

powering first production deployments. Be part of a small, agile, highly motivated team at the forefront of AI and enterprise applications.