Jobs in the United States

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Added 1 min ago
ZT
2027 Summer Internship (US) - Software/AI Engineer (Handheld Mobile Computers)
Zebra Technologies
Holtsville, NY
- $33 to $40.5 USD / hour
…with different organizations to ensure our software meets all requirements. We also create applications to demonstrate our value-added features to help enable…
Added 2 mins ago
C
Staff Engineer – Heat Transfer
Carrier
East Syracuse, NY
- $96,000 to $192,000 USD / year
…seeking a motivated, results-oriented and experienced Staff Engineer to join our team. The candidate will be a key member of the team providing advanced heat exchanger solutions to…
Added 2 mins ago
M
Project Engineer
MTA
Jamaica, NY
- $59.24 USD / hour
Must possess a Fundamentals of Engineering or Engineer in Training (F.E. or EIT certification) OR demonstrated, directly related, equivalent experience (Minimum 6 years with LIRR,…
Added 2 mins ago
A
Software Cyber Engineer
Actalent
Liverpool, NY
- $40 to $55 USD / hour
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections,…
Added 2 mins ago
Senior Desktop Support Engineer
Robert Half
White Plains, NY
Description • Engineer and support Windows desktop and laptop environments.
Added 2 mins ago
C
Sr. Building Engineer
CBRE
Melville, NY
- $100,000 to $140,000 USD / year
To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or…
Added 3 mins ago
Principal Aortic Clinical Specialist - Syracuse, NY
Medtronic
Syracuse, NY
For Baccalaureate degrees earned outside of the United States, a degree that satisfies the requirements of 8 C.F.R. § 214.2(h)(4)(iii)(A) is required.
Added 3 mins ago
AI Engineer
Integrity Technology Consultants, Inc.
Annapolis Junction, MD
As a Mid-level AI Engineer you will be supporting an IC Customer working on mission driven applications. Candidates in this role will:
Added 3 mins ago
Senior Security GRC Engineer, AI & Automation
American Express Global Business Travel
Albany, NY
AmexGBT’s Security GRC team is looking for a talented Senior Security GRC Engineer to design, build, and scale automation and AI-driven solutions that modernize our governance, risk, and…
Added 3 mins ago
Senior Software Engineer (Institutional, Financing)
Coinbase
Albany, NY
As a Senior Software Engineer on the Financing Engineering team within the Institutional group, you'll design, build, and scale the systems that safely manage billions of dollars in loans…
Added 3 mins ago
Tactical Engineer
IBM
Albany, NY
Tactical Engineer - AWS Night Shift (N1 Team)
Added 3 mins ago
Network Operations Engineer
Meta
Albany, NY
Meta is seeking a Network Operations Engineer to join our Edge and Network Services (ENS) Foundation NetOps team. In this role, you will utilize your knowledge in hyperscale data center…
Added 3 mins ago
Senior Engineer
PwC
Albany, NY · Buffalo, NY · Rochester, NY · Melville, NY
As a Senior Engineer you will help design, build, and test custom applications within our Advisory practice, bringing together software engineering, cloud-based solution delivery, and…
Added 3 mins ago
AI Infrastructure Engineer
BlackRock
New York, NY
As an AI-Enabled Infrastructure and Systems Engineer, you will combine deep infrastructure expertise with modern software engineering practices to design, build, and operate the platforms…
Added 3 mins ago
AE
Sr Agentic AI Engineer - Core Platforms
American Express
New York, NY
- $123,000 to $215,250 USD / year
The Inference Engineer is responsible for independently designing, optimizing, and operating scalable production inference services that enable enterprise AI and machine learning solutions.…
Added 3 mins ago
Google Workspace Customer Engineer, Mid-Market Enterprise, Google Cloud
Google
New York, NY
Share Google Workspace Customer Engineer, Mid-Market Enterprise, Google Cloud
Added 4 mins ago
AE
Senior Data Engineer - Amex Ads, Offers, and Dining Technology
American Express
New York, NY
- $123,000 to $215,250 USD / year
Partner with Product, Business, Analytics, Architecture, and Engineering teams to define data requirements and deliver scalable data solutions.
Added 4 mins ago
Scrum Master
EPAM Systems
New York, NY
Added 4 mins ago
Lead Engineer
PwC
Rochester, NY · New York, NY · Melville, NY · Albany, NY · Buffalo, NY
As a Lead Engineer you will guide the design, build, testing, and modernization of custom applications across cloud-native and on-premise environments, using modern engineering approaches,…
Added 4 mins ago
Software Engineer, VOD
NBC Universal
New York, NY
The VOD Engineering team is looking for a Software Engineer to join our engineering team responsible for building and supporting business critical video workflows, systems, and…
Added 4 mins ago
Senior Data Technology Consultant, Databricks Data & AI Practice
EPAM Systems
New York, NY
Must have: Databricks certifications (e.g., Data Engineer Professional, Machine Learning Professional, or Generative AI Engineer) and experience with Databricks partner programs
Added 4 mins ago
Python AI Engineer
EPAM Systems
New York, NY
We are hiring a Python AI Engineer to operate and evolve the infrastructure behind an enterprise knowledge base platform as it transitions from a Confluence-focused RAG chatbot into a…
Added 4 mins ago
Architect Advanced
Mphasis Corporation
NEW YORK, NY
…manage, and convert raw data into usable information for business requirements. As a knowledge Engineer, you'll play a crucial role in ensuring data retrieval, reliability, quality, and…
Added 4 mins ago
Technical Project Manager, Executive Director, AI Product Management Team
JPMorgan Chase
New York, NY
…launch and scaled rollout. You are highly technical (ideally ex-engineer/researcher/data scientist) with experience building production systems, and you can translate product vision into…
Added 4 mins ago
Partner Engineer, Payments & Financial Technologies
Meta
New York, NY
…success of Meta's users, products, and partners. As a Partner Engineer, you will develop scalable production-grade code across Meta's platforms; you will collaborate with other product…

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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