Full Stack AI Engineer Needed for Fintech App Development

Posted 4 days ago

Worldwide

Summary

We are looking for an experienced **Full Stack AI Engineer** to help build and ship a fintech application that combines AI-powered financial insights with core banking and payments infrastructure. This is a **long-term contract role** for someone who can work independently, communicate clearly, and take ownership of features from backend architecture to frontend implementation. ## Project Overview We are building a fintech platform that includes AI-driven financial insights, secure financial data integrations, dashboards, alerts, and payment-related workflows. You will help us develop and integrate features end-to-end, including LLM-powered backend services, RAG systems, secure APIs, and responsive user interfaces. ## Responsibilities You will be responsible for: * Building AI features such as LLM pipelines, RAG systems, fraud detection tools, and financial forecasting workflows * Developing secure backend APIs using Python/FastAPI or Node.js * Integrating with financial data providers such as Plaid, Stripe, or similar platforms * Building frontend dashboards and user interfaces using React/Next.js * Connecting to real-time data feeds, banking/payment APIs, and financial infrastructure * Working with PostgreSQL and vector databases such as pgvector, Pinecone, or similar * Ensuring code follows strong security practices suitable for fintech applications * Supporting compliance-related technical requirements such as PCI-DSS and SOC 2 where applicable ## Required Skills Please apply only if you have strong experience with: * React/Next.js * Python/FastAPI or Node.js * LLMs and AI frameworks such as OpenAI, Anthropic, LangChain, or LlamaIndex * PostgreSQL and vector databases * REST and GraphQL API design * Cloud deployment on AWS, GCP, or Azure * Docker and/or Kubernetes * Financial APIs such as Plaid, Stripe, or similar * Secure development practices for sensitive financial data ## Nice to Have Experience with any of the following is a plus: * PCI-DSS, SOC 2, KYC, or AML workflows * Kafka, WebSockets, or real-time data streaming * Previous work at a fintech, neobank, payments company, or financial services company ## Engagement Details * **Job Type:** Long-term contract * **Estimated Hours:** 30–40 hours per week * **Budget:** $75–$125/hour, depending on experience * **Availability:** Some overlap with US business hours is preferred, especially EST or PST ## What We’re Looking For We are looking for someone who: * Has a proven track record building full-stack applications * Has shipped AI/LLM features in production * Can communicate proactively and flag blockers early * Can work independently without heavy hand-holding * Understands the importance of security, reliability, and compliance in fintech ## To Apply Please include answers to the following questions in your proposal: 1. Describe a fintech or AI project you have built. What was your role, and what did you ship? 2. Which AI frameworks and LLM providers have you used in production? 3. What is your availability, and what is your preferred hourly rate? 4. Please include relevant portfolio links, GitHub links, or work samples. Proposals that do not answer these questions will not be reviewed.

  • More than 30 hrs/week
    Hourly
  • 1-3 months
    Duration
  • Expert
    Experience Level
  • $75.00

    -

    $125.00

    Hourly
  • Remote Job
  • Ongoing project
    Project Type

Contract-to-hire opportunity

This lets talent know that this job could become full time.
Learn more
Skills and Expertise
Mandatory skills
TypeScript
React
Node.js
Activity on this job
  • Proposals:50+
  • Last viewed by client:3 days ago
  • Hires:
    1
  • Interviewing:
    1
  • Invites sent:
    2
  • Unanswered invites:
    0
About the client
Member since May 4, 2026
  • United Kingdom
    Dundee8:25 AM
  • $1K total spent
    2 hires, 1 active
  • Tech & IT
    Small company (2-9 people)

Explore similar jobs on Upwork

Software DeveloperHourly‐ Posted 7 months ago
ASP.NET MVC
Django
Python
AngularJS
JavaScript
jQuery
WordPress
Google Chrome Extension
React
CRM Development
Microsoft Dynamics 365
Microsoft Dynamics CRM
Microsoft Dynamics Development
Microsoft PowerApps
Single Sign-On
Solidity
Smart Contract
Ethereum
Blockchain
Cryptocurrency

How it works

  • Post a job icon
    Create your free profile
    Highlight your skills and experience, show your portfolio, and set your ideal pay rate.
  • Talent comes to you icon
    Work the way you want
    Apply for jobs, create easy-to-by projects, or access exclusive opportunities that come to you.
  • Payment simplified icon
    Get paid securely
    From contract to payment, we help you work safely and get paid securely.
Want to get started? Create a profile

About Upwork

  • Rating is 4.9 out of 5.
    4.9/5
    (Average rating of clients by professionals)
  • G2 2021
    #1 freelance platform
  • 49,000+
    Signed contract every week
  • $2.3B
    Freelancers earned on Upwork in 2020

Find the best freelance jobs

Growing your career is as easy as creating a free profile and finding work like this that fits your skills.

Trusted by

  • Microsoft Logo
  • Airbnb Logo
  • Bissell Logo
  • GoDaddy Logo