Relixir
Join to apply for the
Founding Engineer (Full-stack)
role at
Relixir .
Base pay range $200,000.00/yr - $250,000.00/yr
Role:
Founding Full Stack Engineer Location:
In-person, SF Stack:
Next.js, TypeScript, FastAPI, PostgreSQL, AWS (ECS, Fargate), LLM APIs
What You’ll Work On
Architect and ship core product surfaces with Next.js + Typescript
Design and implement high quality user experiences for complex state / data patterns
Deliver fast and clear data visualizations for millions of data points from various sources
Backend Infrastructure
Building features in Python (FastAPI) with PostgreSQL as our primary database.
Managing AWS infrastructure — primarily ECS/Fargate, Lambda, S3, and related services.
Designing APIs for the frontend (TypeScript) and partner integrations.
Working on AI (LLM-powered) features end-to-end
The ROLE You are not just an employee – you are a builder of the company.
You’ll be at the core of shaping Relixir’s product, technology, and trajectory – from hands‑on full‑stack development, to collaborating on the big decisions that define our future.
Strategic Impact – Work directly with the founders to influence technical and product direction, deciding how we scale our platform and what bets we make in AI search automation.
End‑to‑End Ownership – Take ideas from rough concepts to production‑ready systems – UI/UX, frontend components, APIs, LLM usage, and everything in between. You’ll own critical features and ensure they’re fast, reliable, and a joy to use.
Customer‑Driven Development – Talk to customers, dig into their needs, and turn feedback into technical solutions that directly impact their growth.
About You
Deeply Curious – You actively seek to understand complex systems, customer problems, and the latest technical possibilities. Curiosity drives your best work.
Relentlessly Driven – You thrive in early‑stage chaos. You move quickly, test bold ideas, and turn uncertainty into working solutions.
True Owner – You don’t just “complete tickets.” You take full responsibility for delivering outcomes — finding a path forward even with incomplete information.
Collaborative & Humble – You share ideas openly, listen actively, and care more about the best solution than being right. You’re confident in your skills but always learning.
Must-Haves
In‑person SF
High‑agency
1-3+ years of experience building frontend & backend software for VC‑backed startups
Leveraged LLMs for building critical product features
Strong proficiency in Next.js, Typescript, and Python
Have completed at least one 0 → 1 journey of a functional product
Nice‑to‑haves
Entrepreneurial Mindset: Ex‑founder or future founder
AWS Infrastructure Management
Timescaledb or any OLAP experience
Qdrant/RAG, LangChain/LLM tooling, prompt/eval experience.
Why This Role is Special
You’ll be part of the founding team — shaping the product, culture, and technical foundation of a YC‑backed startup already working with 50+ enterprise customers.
You’ll have ownership — own UI/UX quality, API/DB design, and performance end‑to‑end. Shipping features that surface insights and actions from millions of AI‑search data points each week.
Seniority level Mid‑Senior level
Employment type Full‑time
Job function Engineering and Information Technology
Industries Software Development
Referrals increase your chances of interviewing at Relixir by 2x.
#J-18808-Ljbffr
Founding Engineer (Full-stack)
role at
Relixir .
Base pay range $200,000.00/yr - $250,000.00/yr
Role:
Founding Full Stack Engineer Location:
In-person, SF Stack:
Next.js, TypeScript, FastAPI, PostgreSQL, AWS (ECS, Fargate), LLM APIs
What You’ll Work On
Architect and ship core product surfaces with Next.js + Typescript
Design and implement high quality user experiences for complex state / data patterns
Deliver fast and clear data visualizations for millions of data points from various sources
Backend Infrastructure
Building features in Python (FastAPI) with PostgreSQL as our primary database.
Managing AWS infrastructure — primarily ECS/Fargate, Lambda, S3, and related services.
Designing APIs for the frontend (TypeScript) and partner integrations.
Working on AI (LLM-powered) features end-to-end
The ROLE You are not just an employee – you are a builder of the company.
You’ll be at the core of shaping Relixir’s product, technology, and trajectory – from hands‑on full‑stack development, to collaborating on the big decisions that define our future.
Strategic Impact – Work directly with the founders to influence technical and product direction, deciding how we scale our platform and what bets we make in AI search automation.
End‑to‑End Ownership – Take ideas from rough concepts to production‑ready systems – UI/UX, frontend components, APIs, LLM usage, and everything in between. You’ll own critical features and ensure they’re fast, reliable, and a joy to use.
Customer‑Driven Development – Talk to customers, dig into their needs, and turn feedback into technical solutions that directly impact their growth.
About You
Deeply Curious – You actively seek to understand complex systems, customer problems, and the latest technical possibilities. Curiosity drives your best work.
Relentlessly Driven – You thrive in early‑stage chaos. You move quickly, test bold ideas, and turn uncertainty into working solutions.
True Owner – You don’t just “complete tickets.” You take full responsibility for delivering outcomes — finding a path forward even with incomplete information.
Collaborative & Humble – You share ideas openly, listen actively, and care more about the best solution than being right. You’re confident in your skills but always learning.
Must-Haves
In‑person SF
High‑agency
1-3+ years of experience building frontend & backend software for VC‑backed startups
Leveraged LLMs for building critical product features
Strong proficiency in Next.js, Typescript, and Python
Have completed at least one 0 → 1 journey of a functional product
Nice‑to‑haves
Entrepreneurial Mindset: Ex‑founder or future founder
AWS Infrastructure Management
Timescaledb or any OLAP experience
Qdrant/RAG, LangChain/LLM tooling, prompt/eval experience.
Why This Role is Special
You’ll be part of the founding team — shaping the product, culture, and technical foundation of a YC‑backed startup already working with 50+ enterprise customers.
You’ll have ownership — own UI/UX quality, API/DB design, and performance end‑to‑end. Shipping features that surface insights and actions from millions of AI‑search data points each week.
Seniority level Mid‑Senior level
Employment type Full‑time
Job function Engineering and Information Technology
Industries Software Development
Referrals increase your chances of interviewing at Relixir by 2x.
#J-18808-Ljbffr