Jobs in the United States

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Senior Backend Engineer
Gaya
Remote, United States
As a Senior Backend Engineer at Gaya, you will be critical in enhancing and scaling our backend systems. You will be responsible for improving our API infrastructures, optimizing core…
Added just now
Lead Engineer
Gaya
Remote, United States
As a Lead Engineer at Gaya, you will take on a crucial leadership role in shaping our platform's front-end and back-end architecture. You will be instrumental in driving the development of…
Added just now
Frontend Engineer
Gaya
Remote, United States
We are seeking a Frontend Engineer skilled in React and NextJS with demonstrable experience to develop our web portal and support the development of our browser extension. This role focuses…
Added just now
Senior Software Engineer (full stack)
IBBX Wireless Energy
United States
Create cloud solutions that meet performance and security requirements, ensuring high availability and resilience.
Added 1 min ago
CA
General Engineer
Customs and Border Protection
Aliso Viejo, CA · Euless, TX
- $106,437 to $138,370 USD / year
Organizational Location: This position is with the Department of Homeland Security, within U.S. Customs and Border Protection, Office of Facilities and Asset Management, Mission Support…
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
Lead QA Engineer - Equity Only
Luupli
Remote, United States
We are seeking an experienced Lead QA Engineer to lead our quality assurance efforts. In this role, you will be responsible for ensuring the highest quality standards for our mobile…
Added 2 mins ago
MT
Site Reliability Engineer
Medina Talent Group
Irvine, CA
- $125,000 to $155,000 USD / year
As a Site Reliability Engineer, you will be immersed in a high-performing and frequently challenged team responsible for the reliability, scalability, and operational excellence of product…
Added 2 mins ago
MT
Senior Security Ransomware Engineer
Medina Talent Group
Remote, United States
- $98,000 to $154,000 USD / year
The Sr. Security Engineer is responsible for protecting technological assets by establishing and enforcing system and network access controls. The Security Engineer will focus on the…
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 3 mins ago
Network Support Engineer
Mibura Inc.
Remote, United States
Join our team as a Network Support Engineer, where your technical & analytical skills, proactive mindset, and passion for solving complex problems with the internet will come into play.…
Added 3 mins ago
Edge Computing Solutions Engineer
Mibura Inc.
CA · Mountain View, CA
We are seeking a highly skilled and experienced Solutions Engineer to join our Edge Computing team. As a Solutions Engineer, you will play a critical role in designing, implementing, and…
Added 3 mins ago
Senior Power Systems Engineer
Analog Devices Inc.
CA
DC/HV Power System Engineer within Datacenter Infrastructure
Added 3 mins ago
Senior Power Systems Engineer
Analog Devices Inc.
CA
DC/HV Power System Engineer within Datacenter Infrastructure
Added 4 mins ago
SD
Senior Site Reliability Engineer (Disaster Recovery
SunCore Digital
Scottsdale, AZ · Bellevue, WA
- $145,000 to $200,000 USD / year
SunCore Digital is seeking a hands-on Senior Site Reliability Engineer (Disaster Recoveryr to assess, implement, test, and document service and data recovery capabilities.
Added 4 mins ago
SD
Senior Site Reliability Engineer
SunCore Digital
Remote, United States
- $145,000 to $185,000 USD / year
SunCore Digital is seeking a hands-on Senior Site Reliability Engineer to assess the current reliability and scalability of our systems, identify risks, and implement the technical changes…
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
Principal Engineer
SunCore Digital
Scottsdale, AZ
- $200,000 to $260,000 USD / year
We are looking for a Principal Engineer to own the architecture of our platform and lead it through its next stage. This is one role with three responsibilities in sequence. First, 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
Certifications such as OSCP, CEH, Security+, AWS/GCP Certified Security Engineer
Added 4 mins ago
Imaging Service Engineer 3
Anastasia Talent Group
Cleveland, OH
Anastasia Talent Group is recruiting an Imaging Service Engineer 3 on behalf of a confidential organization supporting healthcare technology operations in Cleveland, Ohio. This role…
Added 4 mins ago
AI Full Stack Engineer (Volunteer)
Solution Community
Remote, United States
Volunteer AI Full Stack Engineer (AI-Native / Rapid Development)
Added 7 mins ago
TW
AI Marketing Project Manager
Together We Talent
Remote, United States
- $50 to $60 USD / hour
This is not an AI Engineer or AI Developer position. The Project Manager will serve as the critical bridge between Marketing business owners and AI development teams, translating marketing…
Added 8 mins ago
Backend Software Engineer ($10,000) - Washington, DC
Jobs Xchange
Washington, DC
Impactful Work: Your contributions will directly influence critical national security programs and initiatives.

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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