Jobs in the United States

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Added 2 mins ago
Senior Systems Engineer - Wireless & Wired Networking (Remote)
The Home Depot
Remote, United States
The Sr. Systems Engineer is responsible for independently developing, maintaining, and supporting The Home Depot's technical infrastructure that drives the success of The Home Depot and our…
Added 3 mins ago
AI Developer Relations Engineer (Copy)
Félix
United States
Turn project lessons into reusable briefs, checklists, decision records, and handoff standards.
Added 3 mins ago
Security Engineer
American Cyber
Remote, United States
American Cyber is seeking a Security Engineer / Cybersecurity Engineer (Independent Contractor – 1099) to support the design, implementation, and optimization of security solutions across…
Added 4 mins ago
Substation Engineer Remote
DuVall Enterprises, LLC
Remote, United States
As their Substation Engineer, you will hands on with the technical support on both physical and protection & control (P&C) projects and will work closely with Substation Engineering…
Added 4 mins ago
DE
Structural Steel Project Engineer - CFS Group
DuVall Enterprises, LLC
Las Vegas, NV · Boise, ID
- $90,000 to $120,000 USD / year
We have an opportunity for a qualified Structural Project Engineer to join our structural team in the Cold Formed Steel Group. Candidates will have an opportunity to work on large, moderate…
Added 4 mins ago
DE
Structural Engineering Project Manager
DuVall Enterprises, LLC
Draper, UT · Arlington, TX · Mesa, AZ
- $95,000 to $120,000 USD / year
Experienced Structural Engineer | Project Manager
Added 4 mins ago
DE
Structural Engineer
DuVall Enterprises, LLC
Las Vegas, NV
- $90,000 to $110,000 USD / year
Our client has an opportunity for a qualified Structural Project Engineer to join our structural team. Candidates will have an opportunity to work on large, moderate and small projects of…
Added 4 mins ago
Senior Structural Project Engineer
DuVall Enterprises, LLC
Las Vegas, NV · Boise, ID
We have an opportunity for a qualified Structural Senior Project Engineer to join our structural team. Candidates will have an opportunity to work on large, moderate and small projects of…
Added 6 mins ago
Senior Software Engineer, Systems and Tools
Heart of the Dawn Games
Remote, United States
We are looking for a versatile and highly motivated Senior Engineer to join our Unreal, Mission Tools team. In this role, you will build systems and tools within Unreal 5 that will be used…
Added 7 mins ago
Sr. Structural Engineer
New Purpose Recruitment
Mobile, AL
Responsible for supervision and technical direction over a team of engineers and designers when functioning as a lead engineer. As lead engineer, responsibilities include total delivery of…
Added 7 mins ago
Sr. Engineer High Voltage Design
New Purpose Recruitment
Huntersville, NC
We are currently supporting a client on a Direct Hire opportunity for a Sr. Engineer High Voltage Design in Huntersville, NC.
Added 7 mins ago
Fire Sprinkler Project Manager
New Purpose Recruitment
Charlotte, NC
Oversee and communicate project progression from inception to completion including design, permits, material delivery, labor schedules, and field installation.
Added 7 mins ago
RS
Senior .NET Software Engineer
Recruiting Source International LLC
Remote, United States
- $100,000 to $120,000 USD / year
6 years of experience in database implementation and data model design.
Added 7 mins ago
Process Engineer - Associate
syncreonAmerica
CARLISLE, PA
Work closely with Operations, Account Management, Facilities and Project Management teams to develop and implement solutions to meet the requirements of the business.
Added 7 mins ago
SE
Energetics Process Engineer
Supply Energetics
Parsons, KS
- $145,000 to $170,000 USD / year
We’re hiring an Energetics Process Engineer at our Prairie Forge production facility in Parsons, KS to manage industrial process and equipment for our overall physical operations. The role…
Added 8 mins ago
Director of Power Engineering
Deca
San Francisco, CA
…compete by orchestrating power solutions creatively across each project’s unique constraints. We have the capital, ambition, and entrepreneurial DNA to become the premier platform in this…
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
A
Support Systems Engineer - NAMER
Ashby
Remote, United States
- $100,000 to $130,000 USD / year
That’s why we’re searching for a Support Systems Engineer to become the long-term owner of our Support systems.
Added 11 mins ago
Hardware Engineer
IBBX Wireless Energy
United States
IBBX is looking for an Electronics Engineer, to focus on emerging technologies such as Wireless Power Transfer (WPT) and Energy Harvesting (EH). In this role, you will be responsible for…
Added 12 mins ago
CA
General Engineer
Customs and Border Protection
Aliso Viejo, CA · Euless, TX
- $106,437 to $138,370 USD / year
Coordinating with internal customers and stakeholders to develop and validate project requirements that meet housing needs and applicable design standards.
Added 13 mins ago
Mechanical Engineer, Production Operations (Starship)
SpaceX
Starbase, TX · Brownsville, TX
OPERATIONS ENGINEER, STARSHIP PRODUCTION (STARBASE)
Added 13 mins ago
CO
Project Manager / Civil Engineer
Connections Outsourcing
Houston, TX
- $120,000 to $150,000 USD / year
Lead and mentor a team of Civil Engineers, EITs, designers, and CAD draftsmen, providing technical guidance, QA/QC oversight, and design feedback.
Added 13 mins ago
MT
Forward Deployment Engineer- 100 remote
Medina Talent Group
Remote, United States
- $150,000 to $190,000 USD / year
Foundational knowledge of full-stack engineering principles and system design.
Added 13 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 14 mins ago
Process Engineer I-IV
Compass Minerals
Ogden, UT
Summary: The Process Engineer serves as a technical leader responsible for process engineering activities associated with the design, operation, optimization, and continuous improvement of…

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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