Jobs in the United States

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Added 2 mins ago
Senior Software Quality Engineer
Abbott Laboratories
Sylmar, CA
This position is responsible for software quality, compliance, and design assurance activities associated with cloud-based medical device applications and supporting infrastructure. This…
Added 3 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 3 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 4 mins ago
GL
Frontend Developer (Founding Team)
Gradientflo Labs
San Francisco, CA
- $32,000 to $40,000 USD / year
…role for someone who just "makes things look good." We need an engineer who understands the React reconciliation process, cares deeply about Core Web Vitals, and writes self-documenting…
Added 4 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 5 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 5 mins ago
DevSecOps Engineer Internship
Metasys
Remote, United States
The DevSecOps Engineer is responsible for automating, integrating, and enforcing security controls throughout the entire development lifecycle, from code commit to production deployment.…
Added 5 mins ago
DevOps Engineer Internship
Metasys
Remote, United States
The DevOps Engineer is responsible for automating, streamlining, and maintaining the infrastructure and deployment pipelines for our entire integrated platform. You'll ensure rapid,…
Added 5 mins ago
Backend Engineer Internship
Metasys
Remote, United States
API Development & Implementation: Design, develop, and deploy highly scalable APIs for all platform components using Node.js 22 and NestJS within the TypeScript modular monolith. This…
Added 6 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 6 mins ago
HPC Engineer/Architect
Comspark group
New York, NY
Design, architect and oversee implementation of Linux based HPC clusters and storage
Added 26 mins ago
SO
UAM Everfox Tool Engineer - Mid-level
System One
Lorton, VA
- $77 to $80 USD / hour
Assist with design, implementation, and integration of network changes. IP address management IPAM, switch setup, and network operations support.
Added 26 mins ago
SO
UAM Everfox Tool Engineer - Senior Level
System One
Lorton, VA
- $96 to $100 USD / hour
Assist with design, implementation, and integration of network changes.
Added 32 mins ago
PI
Staff Machine Learning Engineer
PayPal, Inc.
San Jose, CA
- $196,500 to $291,500 USD / year
As a Staff Engineer, you will lead the design, development, and implementation of advanced machine learning (ML), large language model (LLM), and agentic AI systems that solve complex…
Added 33 mins ago
T
AWS Connect Systems Engineer
TEKsystems
Scottsdale, AZ
- $50 to $70 USD / hour
We are seeking a Senior Systems Engineer to serve as a lead technical resource for enterprise Amazon Connect and Microsoft Teams Phone environments. This individual will design, implement,…
Added 33 mins ago
IC
Power Integrity Engineer
Intel Corporation
AZ
- $105,650 to $172,860 USD / year
Apply power integrity principles and simulation methodologies to guide package and platform design and physical implementation.
Added 33 mins ago
IC
EDA Tools Software Engineer
Intel Corporation
AZ · CA
- $128,880 to $245,160 USD / year
We are looking for an experienced engineer to join the PDK Reliability Verification / EMIR team. This role will contribute to the development, qualification, and delivery of…
Added 40 mins ago
CO
Division Engineer - Buildings
City of Syracuse
Syracuse, NY
- $83,451 to $98,302 USD / year
…Department of Engineering with responsibility for planning, implementation and inspection of engineering projects. The position requires the application of professional engineering skills…
Added 40 mins ago
Software Dev Engineer
Amazon.com Services LLC
Sunnyvale, CA
Design, develop, and optimize device OS frameworks and system services that power connectivity on Amazon devices, including cellular, location, and related wireless experiences. You'll own…
Added 40 mins ago
Controls Engineer (LabVIEW Specialist)
Vidac Solutions
Fenton, MO
Participate in full project lifecycles-from concept and design to implementation and validation.
Added 40 mins ago
Controls Engineer (LabVIEW Specialist)
Priority Talent Partners
Fenton, MO
Participate in full project lifecycles-from concept and design to implementation and validation.
Added 40 mins ago
Project Engineer
Apex Companies
Oak Brook, IL
…customers, offering expertise in warehouse and industrial facility design, integration of material handling solutions, and optimization of efficiency. We also source and service forklifts,…
Added 40 mins ago
Project Engineer
Apex Companies
Charlotte, NC
…customers, offering expertise in warehouse and industrial facility design, integration of material handling solutions, and optimization of efficiency. We also source and service forklifts,…
Added 45 mins ago
CO
Professional Engineer
City of Green River
Green River, WY
- $96,069.58 to $129,682.38 USD / year
Perform the full range of professional engineering duties involved in the design, planning, and implementation of public works systems; serve as project engineer on construction projects;…
Added 50 mins ago
Staff Systems Safety Engineer
CORP-Corporate Office
United States
· Understanding of requirements development, system/software architecture, hardware/software design, software code implementation, test, verification, and validation

Gradientflo Labs

Frontend 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
Posting language: English

Original job description

You will own the front-end architecture for Gradientflo’s core web applications. This is not a role for someone who just "makes things look good." We need an engineer who understands the React reconciliation process, cares deeply about Core Web Vitals, and writes self-documenting code. You have roughly 3 years of experience. You have moved past "making it work" and now focus on "making it scale." You will be working with server-side rendering, complex global state, and SEO critical implementations. We value clear writing, clean architecture, and strong debugging skills above all else. Core Responsibilities

Architect high-performance pages using Next.js (App Router).
Manage complex application state using Redux Toolkit (RTK).
Audit and optimize application performance (LCP, CLS, FID) using React Profiler and Lighthouse.
Refactor legacy components into reusable, strict SOLID compliant UI patterns.
Design custom hooks that abstract logic cleanly without causing "dependency hell."
Implement SEO best practices (Structured Data, Dynamic Metadata, sitemaps).
Debug complex race conditions and rendering issues using Chrome DevTools.
Write strict TypeScript to eliminate runtime errors.
Conduct code reviews focusing on performance impacts and maintainability.

Technical Requirements Must-Have Skills

React.js & Next.js (3+ years experience)
Redux Toolkit (Slices, Thunks, Selectors)
Performance Optimization (Memoization, Lazy Loading, Code Splitting)
TypeScript (Generics, Utility Types)
Deep understanding of React Hooks (useCallback, useMemo, useReducer)
Strong Debugging skills (knowing why a component re-rendered)
SEO Expertise (Next-SEO, JSON-LD, Open Graph tags)

Strong Pluses

Experience with Headless CMS integration
Experience writing unit tests (Jest / React Testing Library)
Knowledge of Web Accessibility (WCAG)

Technical Task (Mandatory Assessment) Project: Real-Time Asset Tracker (Simulated) Objective: Build a widget that tracks asset prices via simulated polling. This task is designed to expose how you handle complex effect dependencies, stale closures, and memory leaks when a component unmounts. Data Source Note: Do not use a real external API. You must use Static JSON Data stored locally (e.g., data.json) and simulate network latency/random price fluctuations using setTimeout. Functional Requirements

The "High-Dependency" Hook (useAssetTracker) You must implement a custom hook that manages data polling. It must accept all of the following dependencies in its arguments:

assetID (string, e.g., "BTC")
currency (string, e.g., "USD")
pollInterval (number, e.g., 3000ms)
alertThreshold (number, user-defined price alert)
isAutoRefreshEnabled (boolean)
userTier (string, affects polling speed)
onAlertTriggered (function, callback to parent)

The Logic Challenge:

Simulation: The hook should "fetch" data from your static JSON, adding a random delay (500ms to 1500ms) to simulate a network request.
Polling: When isAutoRefreshEnabled is true, fetch new data every pollInterval.
The Trap: If the user types in the alertThreshold input (updating the dependency), it must not reset the polling timer.
The Constraint: You are forbidden from using eslint-disable-next-line react-hooks/exhaustive-deps. You must solve the dependency array stability using useRef or split effects.

Mandatory Lifecycle Cleanup

Your implementation must handle the "Unmount" event gracefully:

Async Cancellation: Since you are using setTimeout to simulate an API, you must ensure that if the component unmounts while the timeout is pending, the state update is cancelled.
Timer Cleanup: clearInterval must be called immediately if assetID changes or the component unmounts.
Proof: Add a console.log('Cleaning up resource for:', assetID) in the return statement of your effect.

Redux Toolkit & State

Store the fetched price history in a Redux Slice.
Use a Memoized Selector to calculate the "High/Low" of the session.
Performance: Ensure that updating the price history only re-renders the Chart/Price component, not the entire Page Layout.

SEO Implementation

Create a dynamic route: /market/[assetID].
Inject dynamic Metadata (Title/Description) based on the assetID.
The page must be indexable by bots (Use Server Components for the shell, Client Components for the tracker).

Clean Code Requirements Mandatory rules:

No useEffect for derived state (use useMemo).
Strict SOLID alignment (Single Responsibility components).
No any types in TypeScript.
Proper separation of container logic vs. presentational components.

Submission Requirements

GitHub Public Repository

Your repo must include:

README explaining how you solved the "Timer Reset" issue when the alertThreshold changed.
Architecture Diagram: A simple diagram showing how data flows from your Static JSON -> Hook -> Redux -> UI.
Local run instructions.

Pull Requests to Raise (The "3-PR Rule")

You must create 3 distinct PRs to simulate a real workflow:

PR 1: Project Setup
Next.js scaffold, TypeScript config, Redux Store setup, Static JSON file creation.
PR 2: The Core Logic
The useAssetTracker hook with all 7 dependencies.
The "Simulated API" service layer.
Redux Slices.
PR 3: Performance
UI Polish.
React.memo optimizations.

Loom Video (Mandatory)

Record a 5 to 10 minute Loom video covering:

The Cleanup Demo:
Open Chrome DevTools Console.
Start the tracker.
Navigate away from the page while it is waiting for the "simulated" data.
Show that your cleanup log appeared and no React warnings (e.g., "update on unmounted component") occurred.
Code Walkthrough: Explain how you used useRef (or your chosen method) to handle the alertThreshold dependency without breaking the linter rules.
SEO Check: Inspect the page source to show the generated Metadata tags.

Evaluation Criteria

The Dependency Array: Did you list all 7 dependencies? (Omitting one is a fail).
Stability: Does changing the Alert Threshold cause the timer to jitter/reset? (It shouldn't).
Cleanup: Is the setTimeout or setInterval actually cleared on unmount?
Code Clarity: Is the code clean, readable, and formatted?
SEO: Is the metadata correctly generated server-side?
Process: Did you follow the 3-PR structure?

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