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CA
General Engineer
Customs and Border Protection
Aliso Viejo, CA · Euless, TX
- $106,437 to $138,370 USD / year
Professional Registration or Licensure: Current registration as an Engineer Intern (EI), Engineer in Training (EIT)1, or licensure as a Professional Engineer (PE) by any State, the District…
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 3 mins ago
SD
Senior Site Reliability Engineer (Disaster Recovery
SunCore Digital
Scottsdale, AZ · Bellevue, WA
- $145,000 to $200,000 USD / year
The engineer may draw on application developers when recovery improvements require changes to application code, databases, data flows, or system-specific behavior. Recovery procedures must…
Added 3 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 3 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 3 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 3 mins ago
Dev/Sec/Ops and Threat Engineering Specialist
SunCore Digital
Scottsdale, AZ · Bellevue, WA
Perform threat modeling for new features, integrations, and system changes
Added 8 mins ago
Senior Software Quality Engineer
Abbott Laboratories
Sylmar, CA
…compliance with applicable medical device regulations, quality system requirements, cybersecurity standards, and design control…
Added 9 mins ago
UI
Manufacturing Design Engineer
Ulysses Inc.
San Francisco, CA
- $130,000 to $180,000 USD / year
…vessel mothership; and Kraken, our automated launch-and-recovery system that closes the loop between surface and subsea with zero human…
Added 9 mins ago
GL
Backend Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $32,000 to $40,000 USD / year
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.…
Added 25 mins ago
Principal Software Engineer, Onsite
RTX
United States
Collins Aerospace is seeking a qualified Principal Software Engineer to support the Joint Precision Approach and Landing System (JPALS) program.
Added 25 mins ago
CO
Assistant Director, Watershed Protection - Modeling, Monitoring, and Compliance (MMC)
City of Austin
United States
- $194,000 to $204,000 USD / year
…as, but not limited to, Professional Geologist, Professional Engineer, Certified Floodplain Manager, Professional Wetland Scientist, and Certified Inspector of Sediment and Erosion…
Added 29 mins ago
Sr. Electrical and Electronic Design Engineer - Future Forward
Intuitive
Sunnyvale, CA
…highest priority. The Sr. Electrical and Electronic Design Engineer owns analog, digital, and mixed-signal circuit design from concept through schematic capture, layout direction, prototype…
Added 31 mins ago
Engineer II, Software Engineering
Red River
Remote, United States
Coordinate test readiness activities, including verification of test environments, hardware configurations, software baselines, and required documentation.
Added 32 mins ago
SO
UAM Everfox Tool Engineer - Mid-level
System One
Lorton, VA
- $77 to $80 USD / hour
Experience with technical planning, system hardware-software-network design, development and integration, verification and validation, and fielding.
Added 32 mins ago
SO
UAM Everfox Tool Engineer - Senior Level
System One
Lorton, VA
- $96 to $100 USD / hour
Experience with technical planning, system hardware-software-network design, development and integration, verification and validation, and fielding.
Added 46 mins ago
Junior Design Verification Engineer, Amazon Leo
Amazon Kuiper Manufacturing Enterprises LLC
Austin, TX · Sunnyvale, CA
· Work with the design and communication systems team and participate in system level verification using test benches constructed using UVM
Added 46 mins ago
Turbine Engine Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, seeks candidates for a Turbine Engine Engineer to support Maneuver Air Directorate. This position is based in Huntsville, AL.
Added 46 mins ago
Systems Engineer/MBSE
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Systems Engineer/MBSE to support an Army Aviation Capability Program Executive (CPE). This position is…
Added 46 mins ago
Software Test Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, seeks candidates for a Software Test Engineer to support the Army Aviation Capability Program Executive (CPE). This position is based in…
Added 46 mins ago
Range Safety & Flight Termination Engineer
Avion Solutions
Huntsville, AL
Provide oversight of requirements development, allocation, and verification for target system FTS products, including autonomous flight termination systems.
Added 46 mins ago
Missile Flight Test Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Missile Flight Test Engineer to support the US Army Space and Missile Defense Command. This position is…
Added 46 mins ago
Architecture Engineer
Avion Solutions
Huntsville, AL
Utilize model-based environments for OEM CDRL reviews, encompassing requirements, verification, hazard assessments, system safety, architecture, maintenance analysis, and interface design.
Added 51 mins ago
Telephone Operator
Kaiser Permanente
Honolulu, HI
Notifies appropriate areas of problems or issues that occur. Notifies supervisor, Network Telephony Engineer and Computer Support Center when Automated Refill System, Professional Pharmacy…
Added 56 mins ago
Sentinel - Sr Principal Engineer Systems - 20170
CORP-Corporate Office
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As a SEIT Verification engineer, you will be responsible for defining and coordinating the Sentinel systems engineering strategy for the allocation and verification of military and industry…

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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