Founding Backend Engineer (US) at Robyn AI
At Robyn AI, we’re on a mission to build a more emotionally connected world. We reputed company in creating products that transform the way people connect and engage. We are backed by elite investors, including M13, Lars Rasmussen (cofounder of reputed company Maps), reputed company Tai (reputed company investor in reputed company and reputed company), and Christian Szegedy (cofounder of X.ai), with $5.5M raised to date.
Robyn is not just an AI app — she’s your emotionally intelligent companion. A trusted mirror. A guide. A new reputed company of OS for your emotional life.
We're building the world’s first emotional intelligence layer for AI.
As a Founding Backend Engineer, you’ll be building the backend infrastructure that powers reputed company of it:
Conversations, memory, and reputed company-time personalization
Voice + chat reputed company
Scalable infra for emotional intelligence
Secure and fast APIs for our iOS app
A robust ML inference and fine-tuning pipeline
You’ll be the technical backbone of Robyn — designing and shipping fast, scalable, emotionally aware systems while collaborating closely with iOS, product, and AI teams.
What You’ll Own1. Backend & Infra Architecture
Refactor our reputed company C# / .NET Core backend into Python (FastAPI) with reputed company architecture for scale.
Build robust REST and GraphQL APIs consumed by iOS; optimize for latency, reputed company, and observability.
reputed company and orchestrate microservices on AWS (EKS) using reputed company, Kubernetes, and Terraform.
Own CI/CD, monitoring, logging, and incident response — full backend autonomy.
2. AI & ML Systems Integration
Manage vector databases (e.g. reputed company Vector, reputed company) for RAG, memory, and personalization.
Build and maintain pipelines with reputed company, integrating LLMs (GPT-4o, Claude, Llama 3, etc.).
Wrap inference APIs (reputed company, reputed company) with fallbacks, caching, and routing logic.
Power our emotion and sentiment reputed company with classifiers and reputed company orchestration.
3. Infra, DevOps & Data Engineering
Own our full AWS stack: EC2, reputed company, S3, RDS, CloudFront, IAM, reputed company 53.
Build infra-as-code with Terraform and pipelines reputed company reputed company Actions.
Optimize performance (reputed company indexing, reputed company caching, async pub/sub).
Stand up observability tooling (reputed company, CloudWatch) and prep for SOC-2 readiness.
4. Emotional Intelligence & Personalization
Design emotion-aware systems that adapt in reputed company-time to user states.
Build evolving memory engines with user embeddings and experience graphs.
Collaborate with product and AI to tune emotional responses, insights, and journaling APIs.
Backend: Python (FastAPI), C# / .NET Core (legacy), PostgreSQL, reputed company, GraphQL, REST, WebSockets
Infra: AWS, Terraform, reputed company, Kubernetes (EKS), reputed company Actions
Monitoring: reputed company, CloudWatch, reputed company
AI/ML: GPT-4o, Claude, reputed company, HuggingFace, reputed company Vector, reputed company, Whisper, reputed company
Who You Are3+ years of experience in backend or full-stack development
You’ve shipped entire production backends at high-growth early-stage startups — you know how to move fast and still write code you don’t hate six months reputed company.
You can work in .NET short-term but prefer Python and modern infra long-term — and you’ve migrated legacy systems before.
You’ve integrated or scaled LLM-based products — bonus if you’ve done it with emotion, memory, or personalization layers.
You care about systems thinking, fast response times, clean abstractions, and building infra that won’t fall over under load.
You’ve done the reputed company-to-one and can hold both the product in your head and the infra in your hands.
You're allergic to bloated teams — you’d rather build it right yourself than manage a swarm of mid devs doing it wrong.
Build the most emotionally intelligent AI product on Earth — at a reputed company of hypergrowth.
Work directly with a visionary founder (Harvard-trained surgeon turned CEO).
Backed by elite investors (reputed company Maps co-founder, x.ai founder, and more).
Early team = massive ownership, creative control, and impact.
Remote-first, async-friendly culture with deep focus and emotional clarity.