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AI Platform Engineer
Harper
San Francisco, CA
- $140,000 to $230,000 USD / year
…$8M seed round, we're looking for an exceptional AI Platform Engineer who can architect and develop the core infrastructure that powers our entire AI…
Added 3 mins ago
AI Developer Relations Engineer (Copy)
Félix
United States
…of a conversation to a community the traditional financial system has historically…
Added 5 mins ago
Founding Engineer Persistent Spatial Worlds (Unity + AI)
Phygtl, Inc.
Remote, United States
The system turns environments - starting with university campuses - into interactive canvases where students coordinate actions and co-create digital artifacts anchored to real locations.
Added 6 mins ago
BT
Controls Engineer
B-K Tool & Design
Mooresville, IN
- $100,000 to $115,000 USD / year
JOB DESCRIPTION: This individual should be an experienced controls engineer familiar with the Indiana area. As the individual gets familiar with our engineering of automation solutions, the…
Added 9 mins ago
Sr IT Software Engineer
Palo Alto Networks, Inc.
CA
The Senior Software Engineer on the Data & Analytics team will design, build, and support full-stack applications; integrate AI technologies into existing and new applications to deliver…
Added 11 mins ago
Senior Software Engineer (full stack)
IBBX Wireless Energy
United States
Contribute to innovation within the company by bringing new ideas and approaches to improve system integration and performance.
Added 11 mins ago
Hardware Engineer
IBBX Wireless Energy
United States
Our first product is the IBBX Retina Suite for industry 4.0, a set of sensors that feed from the machine’s (wasted) electromagnetic energy, and they just work – no cable, no battery…
Added 13 mins ago
Integration Engineer, Heatshield (Starship)
SpaceX
Starbase, TX · Brownsville, TX
Starship requires a robust Thermal Protection System (TPS) to withstand the extreme heat generated during atmospheric reentry at hypersonic speeds. The thermal hardware team is responsible…
Added 13 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 15 mins ago
Founding Frontend/UX Engineer
Solstice Health
New York City, NY
A blank canvas to shape the product: We're still early - this is the rare chance to define the UX foundation, the design system, and the visual identity of a category-defining platform…
Added 15 mins ago
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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 15 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 15 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 21 mins ago
UI
Subsea Acoustics Engineer
Ulysses Inc.
San Francisco, CA
- $145,000 to $190,000 USD / year
Ulysses is the ocean company. We design, manufacture, and operate autonomous vehicles for surface and subsea operations - taking on the most critical tasks across defense, commercial, and…
Added 21 mins ago
UI
Software Engineer
Ulysses Inc.
San Francisco, CA
- $180,000 to $260,000 USD / year
As a Software Engineer at Ulysses, you will own core aspects of the software platform that powers our fleet of autonomous underwater robots - the systems that make them reliable,…
Added 21 mins ago
UI
Manufacturing Design Engineer
Ulysses Inc.
San Francisco, CA
- $130,000 to $180,000 USD / year
Ulysses is the ocean company. We design, manufacture, and operate autonomous vehicles for surface and subsea operations - taking on the most critical tasks across defense, commercial, and…
Added 21 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 21 mins ago
GL
Prompt Engineer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $24,000 to $32,000 USD / year
…think as clearly as the prompts that guide them - and you will design those “thought patterns.” As the founding Prompt Engineer, you’ll build a prompt library and evaluation system that…
Added 21 mins ago
GL
Full Stack Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $40,000 to $60,000 USD / year
End-to-End Feature Delivery - Own user stories from PRD → FE/BE design → shipped feature, ensuring zero gaps between front and back layers.
Added 21 mins ago
GL
Chief Technology Officer (Tech - Founding Pillar)
Gradientflo Labs
San Francisco, CA
- $40,000 to $60,000 USD / year
From low-level system design (Firestore schemas, Pub/Sub orchestration, Redis caches, Neo4j Developer Graph) to pixel-perfect UX outcomes (latency budgets, real-time TutorAgent flows, Vibe…
Added 21 mins ago
GL
Backend Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $32,000 to $40,000 USD / year
…schemas to FastAPI microservices and background workflows, you’ll design and build the backbone that powers Superficient Learning for developers…
Added 25 mins ago
ET
QA Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $125,000 USD / year
We are seeking a detail-oriented and experienced QA Engineer to join our technology team. The ideal candidate will be responsible for ensuring the quality, reliability, and performance of…
Added 25 mins ago
ET
Firmware Engineer (US)
EdgeQ Technologies Private Limited
Dallas, TX · New York City, NY · Seattle, WA · San Francisco, CA
- $75,000 to $120,000 USD / year
We are seeking a motivated Firmware Engineer to develop, test, debug, and maintain firmware for embedded devices and connected hardware products. The ideal candidate will have a strong…
Added 25 mins ago
ET
Embedded Software Engineer (US)
EdgeQ Technologies Private Limited
San Jose, CA · Seattle, WA · Washington, DC
- $85,000 to $135,000 USD / year
We are seeking a skilled Embedded Software Engineer to design, develop, test, and maintain software for embedded systems and connected devices. The ideal candidate will have experience in…
Added 36 mins ago
Infrastructure Engineer I (Onsite)
RTX
United States
Typical job functions for the Infrastructure Engineer I include participation on collaborative, cross-disciplined integrated product teams, often employing agile software development…

Gradientflo Labs

Backend Developer (Founding Team)

San Francisco, CA, United States

$32,000 to $40,000 USD / year

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Job details

Pay: $32,000 to $40,000 USD / year
Experience: 10+ years backend engineering experience (Python, REST/async).
Posting language: English

Original job description

Role Overview You will own Vibecoderz’ engine room. Every interaction the TutorAgent orchestrates, every artifact generated, every certification issued - it all runs through your services. From Firestore schemas to FastAPI microservices and background workflows, you’ll design and build the backbone that powers Superficient Learning for developers worldwide. This role goes beyond writing APIs - you will define system contracts, data models, and scalability patterns that allow Vibecoderz to serve 100K+ concurrent learners with sub-100ms latency. You’ll work in lockstep with FE, AI, Prompt, and DevOps to ensure the platform’s foundation is secure, performant, and future-proof. You’ll use Linear for sprints, Notion for PRDs, and GitHub for repos, collaborating across the team to make backend decisions visible, reproducible, and accountable.

Key Responsibilities

Service Architecture & APIs - Design, build, and maintain FastAPI microservices with clean modular boundaries.
Data Modeling & Schemas - Define Firestore schemas for users, courses, artifacts, results, and certifications. Manage Neo4j Developer Graph integration.
Asynchronous Workflows - Implement Cloud Tasks + Cloud Workflows for long-running jobs (certificate generation, artifact rendering, learner graph updates).
Commercial Layer - Integrate Stripe (subscriptions) and SendGrid (transactional email) via Firebase extensions. Ensure compliance with billing and audit standards.
Performance & Scale - Optimize services for high throughput with async I/O. Achieve <100ms API response time under load.
API Gateway & Security - Expose services through GCP API Gateway with JWT verification, rate limiting, and role-based access.
CI/CD Pipelines - Collaborate with DevOps to maintain GitHub Actions pipelines for automated testing, containerization, and deployment to Cloud Run.
Testing & Reliability - Write integration tests, contract tests, and load tests. Ensure regression-free releases.
Monitoring & Observability - Instrument services with OpenTelemetry for distributed tracing, logging, and metrics. Ensure failures are detectable and recoverable.
Cross-Team Collaboration - Work closely with PM to refine PRDs in Notion, track sprint execution in Linear, and align with AI/FE on contract stability.
Problem Solving - Anticipate bottlenecks (data modeling, latency, scaling) and propose architectural solutions.

Success Metrics

90 Days (Probation):

Deploy FastAPI → Cloud Run service with API Gateway routing.
Ship Firestore schema for Developer Graph (MVP).
Integrate Stripe test billing and SendGrid notifications.

12 Months:

Scale backend to handle 100K+ concurrent learners.
Maintain 99.9% uptime with zero Sev1 backend-originated outages.
Optimize p95 API response time <100ms under production load.
CI/CD coverage >90% with automated regression tests.

Must-Haves

10+ years backend engineering experience (Python, REST/async).
Deep expertise in distributed systems, scalable APIs, and async I/O.
Hands-on GCP experience (Cloud Run, Firestore, Pub/Sub, API Gateway).
Proven delivery of high-scale backend systems in product companies.

Nice-to-Haves

Experience with Neo4j Graph DB.
Prior work on AI product integrations (LLM orchestration, eval pipelines).
Knowledge of Pub/Sub patterns for agentic systems.
Startup or founding engineer background.

Tech Stack Visibility

Core Services: FastAPI, Python Async, Google Cloud Run
Routing & Security: Google Cloud API Gateway, Firebase Auth
Data: Firestore, Neo4j Aura (Developer Graph), Redis
Workflows: Cloud Tasks, Cloud Workflows
Commercial: Stripe (Firebase Extension), SendGrid (Firebase Extension)
CI/CD: GitHub Actions, Docker
Observability: OpenTelemetry, Google Cloud Trace
Tools: Linear (execution), Notion (PRDs), GitHub (repos)

Assessment Objective: Validate ability to build scalable FastAPI backend services with async workflows and integrations.

Challenge (Candidate PoC):

Build a FastAPI backend powering an AI Tutor mock system with:

/generate-course endpoint → Input: “Teach me React Hooks.” Output: structured course outline (JSON).
/generate-artifact endpoint → Generates quiz or slide deck JSON artifact.
/generate-miniapp endpoint → Returns runnable JS snippet.
Store all results in Firestore (schemas for userId, courseId, artifactId).
Trigger Cloud Task for certificate generation (mock PDF).
Fire Firestore trigger → Send transactional email via SendGrid extension.
Secure endpoints with Firebase JWT verification through API Gateway.

Deliverables:

FastAPI app deployed on Cloud Run.
Firestore schema + example populated data.
Postman collection for API requests.
GitHub repo with modular code + CI pipeline.
Short Loom walkthrough demo.

Evaluation Criteria:

Service Architecture & Code Quality (30%)
Data Modeling & Schema Design (20%)
Async Workflow & Cloud Task Integration (20%)
API Security & Performance (15%)
Documentation & Testing (15%)

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