Jobs in the United States

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Added 2 mins ago
Senior Full Stack Developer
Zelis Claims Integrity, LLC
United States
We are seeking an experienced Senior Full Stack Cloud Developer / Software Engineer to design, develop, integrate, and support modern enterprise applications across Microsoft, Azure, AWS,…
Added 6 mins ago
Senior DevOps Engineer (Kubernetes) - Federal
ServiceNow
Santa Clara, CA
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 12 mins ago
Escalation Engineer - Dallas
Island
Coppell, TX
As an Escalation Engineer, you’ll join our growing global Escalation team that sits at the intersection of our customers and our engineering teams. You will deliver exceptional support…
Added 13 mins ago
Mobile Engineer
Stefanini Group
Dearborn, MI
Develop and maintain back-end applications, including APIs and microservices, using server-side languages.
Added 42 mins ago
CP
Senior Software Engineer
Comprehend PT Inc.
BUFFALO, NY
- $120,000 USD / year
Added 43 mins ago
Software Development Engineer, Amazon Ads Demand Tech, Forecasting and Guidance
Amazon
New York, NY
The ideal candidate demonstrates strong technical skills in distributed systems, possesses knowledge of both front-end and back-end technologies, and excels at collaborating across teams.…
Added 43 mins ago
AE
Associate-Tech Ops Support
American Express
New York, NY
- $78,000 to $124,750 USD / year
You Lead the Way. We’ve Got Your Back. At American Express, we know that with the right backing, people and businesses have the power to progress in incredible ways. Whether we’re…
Added 53 mins ago
J
Engineering Manager, Software Engineering (Java Backend)
Jobgether
Remote, United States
- $120,000 to $170,000 USD / year
…Manager, Technical Lead, Engineering Lead, or Staff Software Engineer with team leadership…
Added 1 hour ago
Ford Racing Logistics and Shipping Specialist
Ford
Allen Park, MI · Redford, MI · Redford Charter Twp, MI · Allen Park · Redford Charter Twp
…race-critical components across Ford Racing programs. You will take end-to-end ownership of physical material flow, digital chain-of-custody tracking, and trade compliance for all incoming,…
Added 1 hour ago
Software Developer
CACI International
North Charleston, SC
Back-end: Java, SQL Node.js, Express, Python, Ruby on Rails, or similar
Added 1 hour ago
Ford Racing Logistics and Shipping Specialist
Ford Global
Allen Park, MI · Redford, MI
…race-critical components across Ford Racing programs. You will take end-to-end ownership of physical material flow, digital chain-of-custody tracking, and trade compliance for all incoming,…
Added 1 hour ago
Sr Software Engineer, Front End - Denver, CO & Dallas, TX
AT&T
Denver, CO
We are seeking a Senior Frontend Software Engineer to develop, modernize, and maintain high-performing, secure, and testable user interfaces. This role supports internal platforms that…
Added 2 hours ago
SP
Engineer - Data
Sierra Pacific Industries
Redding, CA
- $85,000 to $115,000 USD / year
Engage and parter with BI developers and analysts to translate reporting needs into reliable back-end data solutions
Added 2 hours ago
Global Sales Coach
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 2 hours ago
Global Sales Coach
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 2 hours ago
Senior Software Engineer
Pearson
Durham, NC · Hoboken, NJ
…to industry level titles such as "Forward Deployment Agent Engineer" or "AI Agentic…
Added 2 hours ago
Manufacturing Engineer- General Assembly
Ford Motor Company
Dearborn, MI
Experience in one or more of the following: Interior, Exterior, Chassis, Powertrain, Electrical, Water test, End of Line
Added 3 hours ago
ZE
Product Engineer (Remote - US CT/ET)
Zen Educate
Remote, United States
- $130,000 to $190,000 USD / year
We are a small, but mighty team and so every engineer has the opportunity to make an outsized impact and put their stamp on what excellence looks like in practice. What do I mean by…
Added 3 hours ago
P
Software Engineer Intern - Summer 2027
PayPal
San Jose, CA · Chicago, IL · Omaha, NE · Scottsdale, AZ · Austin, TX
- $27 to $55 USD / hour
Develop, test, debug, and maintain scalable front-end and/or back-end software using technologies such as Java, Python, Node.js, React, SQL, and REST APIs.
Added 3 hours ago
VH
Biomedical Engineer
Veterans Health Administration
Indianapolis, IN
- $116,537 to $151,502 USD / year
The Biomedical Engineer for Healthcare Technology Management Service at the Indianapolis VA Medical Center, provides biomedical engineering services to a complex, technically sophisticated,…
Added 5 hours ago
E T Consultant
World Bank Group
Washington, DC
ITSFE is seeking a skilled and experienced Solution Engineer to join our growing team as an ET Consultant. The Solution Engineer will design, build, enhance, and support web-based solutions…
Added 7 hours ago
O
Founding Full-Stack Software Engineer Who Has Applied for US Green Card / Visa
OpenGreenCard
San Francisco, CA
- $80,000 to $140,000 USD / year
Validation back-end that checks for common errors in filling out immigration forms.
Added 7 hours ago
Full-Stack Mobile Software Engineer
Spirit AI
Alexandria, VA · Arlington, VA · Fairfax, VA · Tysons, VA · Washington, DC
🌟 Full-Stack Mobile Engineer (iOS & Android)
Added 7 hours ago
D
Founding Software Engineer
daydream
San Francisco, CA
- $150,000 to $200,000 USD / year
daydream is a platform that automates programmatic SEO, end-to-end.
Added 7 hours ago
G
Founding Product Engineer
Goblins
New York City, NY
- $100,000 to $200,000 USD / year
This is a full-stack engineer's role with a heavy focus on our next stage of growth: Your objective is to ensure that every one of the 350K math teachers in the United States is using…

Spirit AI

Full-Stack Mobile Software Engineer

Alexandria, VA, United States
Arlington, VA, United States
Fairfax, VA, United States
Tysons, VA, United States
Washington, DC, United States

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Job details

Posting language: English

Original job description

🌟 Full-Stack Mobile Engineer (iOS & Android) About Spirit Spirit is an angel-backed, ambitious startup building an emotional, ethically-designed AI companion product that blends beautiful 3D/AR experiences, voice, and contextual memory - all powered by AI. Our goal is to create companions that feel alive, personal, and emotionally intelligent - not just chatbots, but presence. We’re a lean, hands-on team where every engineer owns major pieces of the experience. You’ll work directly with founders and AI engineers to define how people emotionally connect with digital beings - from interface to infrastructure.

About the Role We’re looking for a Full-Stack Mobile (and Web!) Engineer who can take Spirit from prototype to production. You’ll architect and build our cross-platform mobile app (iOS & Android), integrating real-time 3D avatars, LLM-driven interactions, and cloud-backed personalization. You’ll own both the frontend (React Native + AR) and backend (Node.js, Python, AWS) layers, ensuring seamless communication between the mobile client, our AI services, and memory databases. This role is perfect for someone who loves both creative engineering and product thinking - designing interfaces that feel magical while ensuring the systems behind them are fast, secure, and scalable.

Responsibilities

Design and build Spirit’s cross-platform mobile app (React Native + Expo or Flutter).
Design and build Spirit’s 3D web app (NextJS, Typescript, Tailwind).
Implement immersive 3D and AR experiences using React Native ARKit, Three.js, or Unity as a Library for avatar rendering and animation.
Develop APIs and backend services (Node.js + Express / NestJS or Python + FastAPI) that handle chat sessions, user memory, and personalization.
Integrate LLMs and AI APIs (OpenAI, Anthropic, or local inference models) for conversational and emotional intelligence.
Build real-time pipelines for chat, voice, and avatar interaction using WebSockets / Socket.IO.
Design and manage databases for context persistence (PostgreSQL + Redis or MongoDB + vector search like Pinecone / FAISS).
Deploy and scale backend systems using AWS (ECS / Lambda / API Gateway / DynamoDB) or GCP Cloud Run + Firestore.
Collaborate with designers to ensure fluid, emotionally resonant UI/UX - including transitions, animations, and interactions.
Maintain best practices in testing, version control (Git), CI/CD (GitHub Actions), and code documentation.
Drive architectural decisions for mobile performance, offline caching, and data privacy.

Tech Stack Frontend

React Native (TypeScript), Flutter for iOS/Android and NextJS, TailwindCSS for Web App
Expo / React Navigation / Redux Toolkit for structure
Three.js, Babylon.js, or Unity (as plugin) for 3D/AR
Lottie / Reanimated / Framer Motion for animation
WebRTC / WebSocket / Voice APIs for real-time communication

Backend

Node.js + Express/NestJS or Python + FastAPI
GraphQL / REST API integration
OpenAI, Gemini APIs for LLM integration
WebSocket / Socket.IO for low-latency messaging
Authentication via Clerk, Firebase Auth or Cognito

Database / Storage

PostgreSQL / Supabase for structured data
Redis / Pinecone / FAISS for embeddings and short-term memory
S3 / Cloud Storage for media, voice, and avatar assets

Cloud & DevOps

AWS (ECS Fargate, Lambda, API Gateway, S3, RDS) or GCP (Cloud Run, Firestore)
Docker for containerization
Kubernetes for container orchestration
GitHub Actions / CircleCI for CI/CD
Monitoring with Datadog or OpenTelemetry

Requirements

Proven experience building mobile and web apps (React Native or Flutter) from scratch.
Solid backend development experience (Node.js or Python) and ability to design RESTful or GraphQL APIs.
Strong grasp of frontend architecture, component design, and state management.
Knowledge of databases (SQL and NoSQL) and cloud deployment pipelines.
Familiarity with AI/LLM API integration (e.g., OpenAI, Hugging Face).
Excellent sense of UI/UX design, especially in animation, microinteractions, and user emotion.
Passion for real-time systems, 3D interfaces, and AR experiences.

Nice to Have

Prior experience with ARKit / ARCore / Unity3D.
Experience optimizing 3D rendering or motion design on mobile.
Exposure to LLM memory systems or vector databases.
Familiarity with privacy-first data design and local caching.
A personal app, open-source contribution, or creative tech project that showcases your imagination.

Why Join Spirit?

Work directly with founders on a product that merges AI, art, and emotion.
You’ll ship live to users - not into a backlog.
Learn cutting-edge tools in LLMs, AR, and 3D while shaping an early product from zero to launch.
Contribute ideas to product, design, and AI direction - you’re not just an engineer, you’re a co-creator.
Flexible remote setup, creative autonomy, and fast growth potential.
Exceptional contributors will be considered for early equity and leadership roles.
Be part of a collaborative, mission-driven team that values innovation, experimentation, and creative problem-solving.

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More about this job

Skills

React Native
Node.js
Python
AWS
Communication skills
Flutter
Next.js
Unity
PostgreSQL
Redis
MongoDB
Amazon DynamoDB
Google Cloud
Collaborate with designers
Git
CI/CD
GitHub
Documentation
TypeScript
React
GraphQL
DevOps
Docker
Kubernetes
Datadog
Back-end development
SQL
NoSQL
Hugging Face
UX design

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