Jobs in the United States

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Added 2 mins ago
Site Reliability Platform Engineer (SRE)
Luupli
Remote, United States
We’re looking for a Site Reliability Platform Engineer (SRE) to help design, optimise, and scale Luupli’s infrastructure, with a specific focus on our mobile-first platform and Google Cloud…
Added 2 mins ago
AI Engineer - Equity Only
Luupli
Remote, United States
As an AI Engineer at Luupli, you will play a pivotal role in developing intelligent systems and orchestrating agentic workflows that power Luupli’s AI features. Your work will span…
Added 2 mins ago
MT
Lead Engineer
Medina Talent Group
Irvine, CA
- $135,000 to $150,000 USD / year
The Lead Engineer for Enterprise Applications is responsible for driving the design, development, modernization, and lifecycle management of enterprise application portfolios. This role…
Added 4 mins ago
SD
Senior Security Operations Engineer
SunCore Digital
Remote, United States
- $165,000 to $205,000 USD / year
SunCore Digital is seeking a hands-on Senior Security Operations Engineer to assess and improve the security of our applications, cloud environments, development practices, identities,…
Added 4 mins ago
SD
Senior DevOps Engineer (Security)
SunCore Digital
Scottsdale, AZ · Bellevue, WA
- $130,000 to $145,000 USD / year
…throughout the southwest. We seek a motivated Senior DevOps Engineer (Security) with an unstoppable drive for excellence and the well-deserved rewards that come with it. Alongside a…
Added 4 mins ago
SD
Mobile Test Engineer
SunCore Digital
Scottsdale, AZ · Bellevue, WA
- $135,000 to $155,000 USD / year
SunCore Digital is seeking a Mobile QA Engineer, Flutter to own hands-on testing of our Flutter-based mobile applications across supported Android and iOS devices.
Added 4 mins ago
Dev/Sec/Ops and Threat Engineering Specialist
SunCore Digital
Scottsdale, AZ · Bellevue, WA
Experience supporting secure API integrations across multiple third‑party systems
Added 4 mins ago
Senior Mechanical Engineer
Anastasia Talent Group
Houston, TX
Anastasia Talent Group is recruiting a Senior Mechanical Engineer on behalf of a confidential organization in Houston, Texas. This role leads the design, development, and improvement of mud…
Added 8 mins ago
Backend Software Engineer ($10,000) - Washington, DC
Jobs Xchange
Washington, DC
Are you a backend software engineer with a passion for building the future of communication, even if you're not actively searching? Imagine contributing your expertise to a cutting-edge…
Added 10 mins ago
GL
QA Automation Engineer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $24,000 to $32,000 USD / year
As the founding QA Automation Engineer, you’ll design frameworks that validate not just code but also AI outputs. From traditional E2E flows to specialized agent evaluation pipelines,…
Added 10 mins ago
GL
Prompt Engineer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $24,000 to $32,000 USD / year
…will design those “thought patterns.” As the founding Prompt Engineer, you’ll build a prompt library and evaluation system that ensures Vibecoderz produces consistent, safe, and…
Added 10 mins ago
GL
Full Stack Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $40,000 to $60,000 USD / year
Authentication & Security - Implement Firebase Authentication (Google/GitHub OAuth), JWT validation in API Gateway, and FE session handling.
Added 10 mins ago
GL
DevOps Engineer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $24,000 to $32,000 USD / year
As the founding DevOps engineer, you will design our CI/CD pipelines, observability stack, infra-as-code, and security posture from day zero. You’ll ensure that when a developer ships code,…
Added 10 mins ago
GL
Chief Technology Officer (Tech - Founding Pillar)
Gradientflo Labs
San Francisco, CA
- $40,000 to $60,000 USD / year
Deep system design expertise: distributed systems, real-time infra, low-latency APIs.
Added 10 mins ago
GL
Backend Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $32,000 to $40,000 USD / year
Performance & Scale - Optimize services for high throughput with async I/O. Achieve <100ms API response time under load.
Added 10 mins ago
GL
AI Engineer (Founding Engineer – AI)
Gradientflo Labs
San Francisco, CA
- $24,000 to $32,000 USD / year
You will be the intelligence architect of Vibecoderz. As the AI Engineer, you’ll design, implement, and optimize the multi-agent orchestration system that powers the TutorAgent,…
Added 11 mins ago
Support Engineer Internship
Metasys
Remote, United States
The Support Engineer / Customer Success role is the primary technical interface for our users. You'll provide timely, expert technical support to both our e-commerce customers and internal…
Added 11 mins ago
Security Engineer Internship
Metasys
Remote, United States
The Security Engineer is a critical role responsible for implementing and enforcing robust security practices across our entire integrated supply chain e-commerce platform. You will…
Added 11 mins ago
Frontend Engineer Internship
Metasys
Remote, United States
The Frontend Engineer is essential for bringing our supply chain e-commerce vision to life by building high-performance, responsive, and accessible user interfaces. You will be responsible…
Added 11 mins ago
Backend Engineer Internship
Metasys
Remote, United States
The Backend Engineer is a hands-on role responsible for the development, scaling, and maintenance of the core API services that power our entire integrated platform. You will build highly…
Added 11 mins ago
Automation QA Engineer Internship
Metasys
Remote, United States
The Automation QA Engineer is vital for ensuring the reliability, performance, and correctness of our entire supply chain e-commerce platform. You will be responsible for designing,…
Added 11 mins ago
AI/ML Engineer Internship
Metasys
Remote, United States
The AI/ML Engineer with an AI Agent Focus is a specialized role dedicated to designing, building, and deploying autonomous AI agents that handle complex business processes independently.…
Added 12 mins ago
CG
Principal Cybersecurity Engineer/ Jr Cybersecurity Architect
Comspark group
Bellevue, WA · Frisco, TX · Overland Park, KS
- $90 USD / hour
Principal Cybersecurity Engineer will help ensure that client’s software, systems and infrastructure are designed and implemented to the highest security standards. Performs technical…
Added 12 mins ago
Head of Engineering - Custody
Prospex CRM
United States
…transactions across chains, and expose all of that as a developer API and a regulated-grade institutional…
Added 12 mins ago
Head of Engineering
Prospex CRM
United States
…transactions across chains, and expose all of that as a developer API and a regulated-grade institutional…

Gradientflo Labs

Full Stack Developer (Founding Team)

San Francisco, CA, United States

$40,000 to $60,000 USD / year

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Job details

Pay: $40,000 to $60,000 USD / year
Experience: 10+ years full stack experience with both React/Next.js (FE) and Python/FastAPI (BE).
Posting language: English

Original job description

Role Overview You will be the bridge between front-end flow and backend logic at Vibecoderz. One moment you’ll be implementing a Cmd+K command palette with buttery animations, the next you’ll be optimizing a Firestore schema to store 100K concurrent learner sessions. As our founding Full Stack Developer, you’ll own end-to-end delivery of features - from Next.js interfaces and block-based editors to FastAPI microservices and GCP workflows. You’ll ensure the TutorAgent’s intelligence and the Vibe Browser’s actions are experienced by users in real time, reliably and securely. You’ll use Linear for execution, Notion for specs, and GitHub for repos, collaborating with FE, BE, AI, Prompt, DevOps, and QA to ship polished, production-ready features at startup velocity.

Key Responsibilities

End-to-End Feature Delivery - Own user stories from PRD → FE/BE design → shipped feature, ensuring zero gaps between front and back layers.
Frontend Engineering - Build real-time collaborative UIs using Next.js, Tailwind, and shadcn/ui. Implement command palettes, block-based editors, and waveform animations.
Backend Engineering - Architect FastAPI services with async workflows, secure endpoints, and clean Firestore/Neo4j schemas.
Realtime Integration - Connect WebSocket events to FE interfaces, ensuring smooth TutorAgent streaming, live cursors, and collaboration features.
AI Workflows Integration - Expose AI outputs (artifacts, quizzes, code snippets) as APIs, and render them cleanly in the FE workspace.
Data Modeling - Define schemas across Firestore and Neo4j (Developer Graph), ensuring efficient queries and scalable structures.
Authentication & Security - Implement Firebase Authentication (Google/GitHub OAuth), JWT validation in API Gateway, and FE session handling.
Performance Optimization - Keep FE interaction latency <200ms, API p95 <100ms, and ensure SSR + RSC patterns deliver SEO-ready performance.
Testing & Reliability - Write E2E tests (FE + BE), schema validation, and contract tests to ensure regression-free deployments.
Collaboration Across Tools - Manage tasks in Linear, write clear PRDs in Notion, and maintain GitHub repo hygiene.
Problem Solving - Anticipate scaling issues across both FE and BE; propose solutions that balance developer experience and system reliability.

Success Metrics

90 Days (Probation):

Deliver one complete feature end-to-end (Text → Course → Artifact → Certification).
Deploy FastAPI → Cloud Run service with FE integration.
Workspace live with block editing, Cmd+K palette, and one AI-gen flow.

12 Months:

Handle 100K+ MAUs with <100ms p95 API latency and <200ms FE interaction latency.
Achieve feature parity with top-tier SaaS (Linear/Notion-level polish).
Zero Sev1 issues caused by FS-owned code in two consecutive quarters.
Test coverage >85% across FE + BE code.

Must-Haves

10+ years full stack experience with both React/Next.js (FE) and Python/FastAPI (BE).
Proven ability to ship end-to-end features in production SaaS products.
Strong grasp of async I/O, distributed systems, and real-time UIs.
Product company background with evidence of scaling products.
Deep understanding of SSR/CSR hybrids, caching, and API design.

Nice-to-Haves

Experience with Neo4j Graph DB.
Contributions to open-source frameworks (React, Next.js, FastAPI).
Prior work on AI-driven products or multi-agent systems.
Startup/founding engineer experience.

Tech Stack Visibility

Frontend: Next.js (App Router), React, TypeScript, Tailwind CSS, shadcn/ui, Zustand, Lucide icons, Framer Motion
Realtime: WebSockets, OT/CRDT frameworks
Backend: FastAPI, Python Async, Cloud Run, API Gateway
Data: Firestore, Neo4j Aura (Developer Graph), Redis
Workflows: Cloud Tasks, Cloud Workflows
Auth: Firebase Authentication (Google/GitHub OAuth)
CI/CD: GitHub Actions, Docker, Terraform
Observability: OpenTelemetry, Google Cloud Trace
Tools: Linear (execution), Notion (PRDs/specs), GitHub (repos)

Assessment Objective: Validate ability to build and deliver an end-to-end feature across FE + BE.

Challenge (Candidate PoC):

Build a Text → Course flow:
FE: Chat panel where user enters “Teach me React Hooks.”
BE: FastAPI endpoint /generate-course that returns structured course outline.
FE: Render outline as interactive blocks (slide, quiz, code snippet).
Add a Mini-App Sandbox:
FE: Code block with syntax highlighting + “Run” button.
BE: /generate-miniapp endpoint returning runnable JS snippet.
Execute safely in iframe with logs/errors captured.
Background Workflow:
Trigger certificate generation (mock PDF) via Cloud Task.
Fire Firestore trigger → SendGrid transactional email.
Performance:
FE interaction latency <200ms.
BE endpoint p95 <100ms.

Deliverables:

Deployed demo (Vercel + Cloud Run).
GitHub repo with FE + BE modular code.
Firestore schema + example data.
Postman collection for APIs.
5-min Loom walkthrough.

Evaluation Criteria:

Architecture & Code Quality (25%)
FE/BE Integration & UX (25%)
Real-time Performance (20%)
Data Modeling & Workflow Integration (15%)
Documentation & Testing (15%)

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