Freelance Backend Engineers in Chicago

Freelance Backend Engineers in ChicagoFreelance Backend Engineers in Chicago

Projects People

Full stack developer | DevOps | Web & Mobile App

Full stack developer | DevOps | Web & Mobile App

Cover image for Micard.io Digital Business Card Platform

Micard.io Digital Business Card Platform

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5

Cover image for Financial Service Platform Enhancement for HubFinance

Financial Service Platform Enhancement for HubFinance

1

6

Cover image for CoachHub - Personal Coach Hiring Mobile App

CoachHub - Personal Coach Hiring Mobile App

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4

Cover image for Cash Management App

Cash Management App

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2

Backend Engineer(2)

I design, build, and scale websites, apps, and AI products!

Top

I design, build, and scale websites, apps, and AI products!

Cover image for Go API Client for Bonsai.io

Go API Client for Bonsai.io

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25

Cover image for Terraform Provider for Bonsai.io

Terraform Provider for Bonsai.io

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17

Cover image for Maximizing Advertising ROI with AWS and Machine Learning: $30MM

Maximizing Advertising ROI with AWS and Machine Learning: $30MM

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19

Cover image for Senior Engineer training and Ruby on Rails refactoring

Senior Engineer training and Ruby on Rails refactoring

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15

Backend Engineer(4)

Full-Stack Engineer | MVP Builds, UI/UX & Systems

New to Contra

Full-Stack Engineer | MVP Builds, UI/UX & Systems

Cover image for Reduced engineering dependency for customer

Reduced engineering dependency for customer configuration — rebuilt a deprecated portal into a flexible self-service admin system. Customers now configure real-time workflows without developer involvement. Rebuilt a legacy platform into a modular, extensible admin system with a queue builder using attribute-based routing logic, hours-of-operation management with exception handling, and a scalable architecture designed for long-term growth. MY ROLE - Led system design and frontend architecture - Implemented core admin interfaces and workflows - Collaborated on backend extensions - Drove customer adoption of new tooling DELIVERABLES - Queue builder with attribute-based routing logic - Hours-of-operation management with exceptions - Modular, extensible admin architecture RESULTS - Reduced engineering dependency for customer configuration changes - Improved scalability of onboarding and customer support workflows - Customers self-configure real-time workflows without developer involvement

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92

Cover image for 1–2 clicks to session start

1–2 clicks to session start — down from a multi-step fragmented flow. Zero lost inbound leads after-hours via conditional fallback UI. Used as a primary feature in revenue-adjacent sales demos. Simplified a fragmented call initiation flow into a fast, intuitive experience. Implemented progressive disclosure — clear primary CTA, minimal modal, then action. Added conditional UI based on hours of operation with an after-hours contact form fallback. Maintained across multiple customer deployments including Coloramo FCU and Chelsea Groton Bank. MY ROLE - Owned UX redesign and frontend architecture - Extended backend APIs for hours-of-operation logic - Implemented real-time UI state handling - Maintained multiple customer deployments DELIVERABLES - Progressive disclosure call initiation flow - After-hours conditional fallback UI - Live deployments at Coloramo FCU and Chelsea Groton Bank RESULTS - 1–2 clicks to session start — down from fragmented multi-step flow - Zero lost inbound leads after-hours - Adopted as a core feature in revenue-adjacent sales demos

0

53

Cover image for 65% faster delivery — rebuilt

65% faster delivery — rebuilt a fragmented peer-to-peer video tool into a scalable conferencing system in 2 weeks instead of 6, using AI-assisted development workflows. Delivered multi-user sessions, adaptive video layouts, two-way screen sharing, and host/guest roles with waiting room and admission control. MY ROLE - Designed interaction models and system flows in Figma - Built frontend architecture and real-time state management - Implemented backend integrations — sockets, Redis, APIs DELIVERABLES - Multi-user video sessions with adaptive layouts - Two-way screen sharing - Host/guest roles + waiting room + admission control TECH STACK Vue, Vite, Pinia, Node.js, Redis, WebSockets, Figma RESULTS - 65% reduction in development timeline — 6 weeks to 2 weeks via AI-assisted workflows - 0→1 prototype transformed into a viable product system - Scalable architecture established for real-time multi-user communication

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86

Cover image for Cut call initiation to 1-2 clicks, zero lost leads

Cut call initiation to 1-2 clicks, zero lost leads

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3

Backend Engineer(3)

Backend & DevOps Expert | Golang, Terraform, C#

Backend & DevOps Expert | Golang, Terraform, C#

Cover image for Automated Risk Assessments for Businesses

Automated Risk Assessments for Businesses

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3

Cover image for Created Advanced AI automations for data pipelines at Meta

Created Advanced AI automations for data pipelines at Meta

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5

Cover image for Building a Scalable FinTech Backend Platform

Building a Scalable FinTech Backend Platform

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4

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Backend Engineer(3)

Sunshine Digital Solutions

Web, Apps, AI, SEO, Design, Content & Video

Web, Apps, AI, SEO, Design, Content & Video

Cover image for Trippy - AI Powered Travel Mobile Apps

Trippy - AI Powered Travel Mobile Apps

1

25

Cover image for RevSwap Car-Swapping App Development

RevSwap Car-Swapping App Development

1

10

Cover image for Food Delivery - Multi Restaurant - Flutter

Food Delivery - Multi Restaurant - Flutter

1

8

Cover image for Fitness App - React Native

Fitness App - React Native

1

6

Backend Engineer(1)

VC deal partner helping Startups build info sites and MVPs

$1k+: Earned

2x: Hired

10: Followers

Expert

Mentor

VC deal partner helping Startups build info sites and MVPs

Cover image for TokenD

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10

Cover image for Bolt Mentor Program

Bolt Mentor Program

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29

Cover image for Startup Guru

0

8

Cover image for Cross Realty Group | Luxury Real Estate

Cross Realty Group | Luxury Real Estate

0

8

Backend Engineer(1)

Senior software engineer

Senior software engineer

Cover image for SUPERHOLD Website

SUPERHOLD Website

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24

Cover image for Sdoge 3D Model website

Sdoge 3D Model website

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22

Cover image for 21TSI projects

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28

Cover image for igloo project

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35

Backend Engineer(1)

Steven Wanderski

Palos Heights, USA

Web Developer

Web Developer

Cover image for SliderUI

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10

Cover image for Popular Pays

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10

Cover image for 4aGoodCause

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9

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Backend Engineer(3)