Open to Work

Hello, I'm Brian

Brian Shimkus, AI Solutions Engineer

Applied AI engineer. Build production systems end-to-end with Python, FastAPI, Salesforce APIs, RAG, and OAuth. 12+ years in fintech.

Actively seeking roles in Applied AI, Customer Integration, or AI Implementation. Available immediately, remote-friendly.

End-to-end ownership from discovery through customer delivery. Based in Chicago.

Recent win: cut a small business's social media workflow from 8 hours a week to 10 minutes through automation

Latest Writing

Blog

Deep dives into building AI systems, integrations, and customer-facing products. From architecture decisions to production deployment.

Where I've Been

Experience

Applied AI & Integration Engineer

Dec 2025 – Present

Insolla (Independent AI Practice) · Chicago, IL

  • ›Run the complete discovery-to-delivery motion: stakeholder discovery calls, solution scoping, tailored demos, architecture design, and proof-of-concept builds, owned end-to-end.
  • ›Produce production-grade AI systems: RAG over live CRM data, identity policy automation, document workflows with enterprise API integrations (REST, webhooks, iPaaS).
  • ›Deliver full pre-sales artifacts: discovery brief, stakeholder map, technical walkthrough, security assessment, and POV plan tailored to each customer's unique systems and constraints.
  • ›Measured impact: cut a small business's social media workflow from 8 hours a week to 10 minutes through automated content pipeline, shipped end-to-end.

Lead Front-End Developer

Aug 2025 – Dec 2025

TerraFort (Freelance)

  • ›Led design and development of a web and mobile platform at an early-stage startup, executing product initiatives from concept to delivery.
  • ›Owned vendor-facing technical evaluations, scoping and integrating third-party and AI tooling into the product.

Senior Front-End Developer

Jul 2024 – Jun 2025

OCC (Contract) · Chicago, IL

  • ›Ran weekly stakeholder sessions at a systemically important financial market utility, covering goal setting, live progress demos, and open-question resolution.
  • ›Delivered React and TypeScript solutions from Figma through production; implemented Mock Service Worker to unblock front-end work from backend dependencies.

Lead Front-End Developer

Oct 2020 – Jan 2024

Marex · Chicago, IL

  • ›Led the program that digitalized broker and trader onboarding, replacing a compliance-heavy, paper-based workflow with a fully digital process and measurably shortening the onboarding cycle.
  • ›Integrated the DocuSign API to digitize document signing across all products.
  • ›Led a five-person front-end team delivering stakeholder-driven solutions; designed and ran the team’s internship program.

Earlier Experience

  • Senior Front-End Developer · Walker & Dunlop (Contract)2020
  • Senior Front-End Developer · ICF2019 – 2020
  • Front-End Developer · TransUnion2018 – 2019
  • UX Architect & Front-End Developer · R1 RCM2016 – 2018
  • Front-End Developer · TimeZoneOne (Contract)2015 – 2016
  • Junior Front-End Developer · Kohactive2013 – 2015

What I Know

Skills

Applied AI

  • OpenAI API
  • LLMs & GPT models
  • RAG architecture
  • LangChain
  • Pinecone & vector databases
  • Structured outputs
  • Evaluations & guardrails
  • Python
  • FastAPI

Integrations

  • Salesforce API (OAuth 2.0 JWT)
  • DocuSign API
  • REST APIs & webhooks
  • JSON & data formats
  • SQL & MySQL
  • AWS

Engineering

  • TypeScript
  • JavaScript
  • Node.js
  • React
  • Next.js
  • Tailwind CSS
  • Git
  • Playwright
  • Vercel

Customer Delivery

  • Technical discovery
  • Problem decomposition
  • Workflow mapping
  • Demo delivery
  • Proof-of-concept scoping
  • Stakeholder alignment
  • Technical handoff

What People Say

Testimonials

Brian and I worked together on the User Experience team, where he was brought in to assist with front end development of our UIUX projects. He did a great job of quickly jumping in to the mix to work on several of our internal projects, bringing a willingness to learn and a positive attitude to every project. He is also very eager to suggest new approaches to projects and brings an innovative, forward-thinking mindset. He is a talented, energetic and very enthusiastic developer and would be a great asset to any team.

Mark Coleman

User Experience Team Colleague

Brian is a hard working & focused user interface and user experience developer. In our time working together at R1, Brian was consistently dedicated and focused on complex projects, often times putting in significant extra work to help the team meet deadlines. He worked equally well with local teams in the office as well as teams based in India. Good teammate that will help you bring your UI/UX to the next level.

Shane Colley

Colleague, R1 RCM

From LinkedIn, earlier in my front-end engineering career.