Jobs in the United States

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Added 1 min ago
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 2 mins ago
Senior Software Engineer (full stack)
IBBX Wireless Energy
United States
…optimization. You will play a key role in hardware and software integration. You will also develop software using either Python, Java, JavaScript (using React…
Added 2 mins ago
RU
SDET Automation Engineer
Randstad USA
Washington, DC
- $50 to $58 USD / hour
Randstad is seeking a Senior SDET Automation Engineer to join a premier client in the Washington, DC area to lead the design, development, and scaling of enterprise-grade test automation…
Added 3 mins ago
Integration Engineer, Heatshield (Starship)
SpaceX
Starbase, TX · Brownsville, TX
…thermal hardware team is responsible for the design, analysis, integration, and continuous improvement of Starship's reentry heatshield and structures. As an integration engineer, you will…
Added 3 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
Staff/Senior Software Engineer, CAD App (Full stack)
Motif
Remote, United States
We are seeking an experienced 3D application developer to help us build cutting-edge, high-performance web applications.
Added 4 mins ago
Staff/Principal Software Engineer, 3D Modeling
Motif
Remote, United States
We are seeking an experienced 3D application developer to help us build cutting-edge, high-performance web applications.
Added 5 mins ago
SD
Senior Site Reliability Engineer
SunCore Digital
Remote, United States
- $145,000 to $185,000 USD / year
…environment health, and work with DevOps and platform staff on shared integration. SRE does not own deployment automation or routine application…
Added 5 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 5 mins ago
SD
Mobile Test Engineer
SunCore Digital
Scottsdale, AZ · Bellevue, WA
- $135,000 to $155,000 USD / year
This role will focus on mobile functionality, device compatibility, application lifecycle behavior, API integration, synchronization, connectivity, and mobile regression testing.
Added 5 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 11 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 13 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 13 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 13 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 13 mins ago
DevSecOps AWS (EKS) Lead Engineer
Comspark group
Phoenix, AZ
We are seeking an experienced DevSecOps AWS ( EKS) Lead Engineer to join our team at Capgemini. This role focuses on CI/CD of applications including Kubernetes-based container orchestration…
Added 15 mins ago
ET
SAP Technical & Functional Support Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $130,000 USD / year
We are seeking a skilled SAP Technical & Functional Support Engineer to provide technical and functional support for enterprise SAP applications and business processes. The ideal candidate…
Added 16 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 16 mins ago
ET
Junior Data Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $75,000 to $115,000 USD / year
We are seeking a motivated and detail-oriented Junior Data Engineer to join our data engineering team. The ideal candidate will have a foundational understanding of Python, SQL, ETL…
Added 16 mins ago
ET
IAM Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $90,000 to $165,000 USD / year
Experience with Active Directory and enterprise application integration.
Added 16 mins ago
ET
Frontend Software Engineer
EdgeQ Technologies Private Limited
New York City, NY
- $65,000 to $95,000 USD / year
We are looking for a motivated and detail-oriented Frontend Software Engineer to join our software development team. The ideal candidate should have a basic understanding of programming…
Added 16 mins ago
ET
Desktop Applications Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $125,000 USD / year
We are seeking a skilled Desktop Applications Engineer to design, develop, test, and maintain high-quality desktop software applications. The ideal candidate will have hands-on experience…
Added 16 mins ago
ET
Cross-Platform Mobile Engineer
EdgeQ Technologies Private Limited
Chicago, IL
- $85,000 to $145,000 USD / year
We are seeking a skilled Cross-Platform Mobile Engineer to design, develop, and maintain high-performance mobile applications for Android and iOS platforms. The ideal candidate will have…
Added 16 mins ago
ET
Build and Release Engineer
EdgeQ Technologies Private Limited
Seattle, WA · New York City, NY
- $100,000 to $165,000 USD / year
We are seeking an experienced Build and Release Engineer to manage, automate, and optimize software build, deployment, and release processes. The ideal candidate will have strong experience…
Added 16 mins ago
ET
Backend Software Engineer
EdgeQ Technologies Private Limited
Austin, TX
- $85,000 to $115,000 USD / year
Work with JavaScript for application integration and backend-related development.

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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