01
Fix & improve
Get your existing website or application working the way it should.
- Bug fixes & troubleshooting
- Legacy upgrades & performance
- Website & UI improvements
Open for projects & part-time collaborations
Good software.
Neatly done.
Custom software, AI integrations, and ongoing support. From a quick fix to a full product build, work directly with a senior engineer who sees it through.
15+ years in production software. Small fixes to ambitious builds.
Experience with teams including
HOW I CAN HELP
From the small fix
to the next big thing.
Bring the thing that’s stuck, the product you want to build, or the work your team needs help with. There’s room for a few hours of support and for something more ambitious.
02
Build something useful
From a focused tool to a complete product, turn a business need into working software—with AI where it helps.
- Custom applications & SaaS products
- APIs, payments & integrations
- AI features & workflow automation
03
An extra pair of hands
Keep things moving with an engineer who can become part of your workflow.
- Part-time development support
- Maintenance & ongoing updates
- Technical advice & code reviews
SELECTED WORK
Useful software.
Real business needs.
SOFTWARE ENGINEER · 2021–2024
Ecommerce & logistics
“Ievgen is a talented software engineer who consistently finds innovative solutions to tough business problems.”
$1.6BCart.com company valuationAnnounced May 2025
CART.COM
Ecommerce software.
Enterprise scale.
As part of Cart.com’s engineering team, I built and modernized order and warehouse management software, APIs, and integrations.
- 6,000+
- customers served by Cart.com
- 75M
- orders supported annually
- Built and maintained a service that processed data feeds for hundreds of client integrations.
- Expanded the warehouse and order management system with new features and upgraded it from Django 1.1 to 4.2 LTS and Python 3.5 to 3.12, replacing outdated dependencies and fixing security vulnerabilities.
- Delivered 20+ operational reports and improved database performance by optimizing PostgreSQL queries, views, and functions.
CUSTOM WEB APPLICATIONFrom an idea
to a working product.
to a working product.
LIVE CLIENT APP
Connecting agents
with inbound calls.
Built and launched as the sole engineer, from architecture and real-time call routing to payments, deployment, and production support.
- 1,500
- users supported
- 1.5M+
- calls handled
During the 2023–2026 engagement
Laravel & VuePostgreSQL & ServerlessTwilio & WebSocketsStripe & AWS
AI PRODUCT · 2026
Subtext.Now
AI that helps people communicate.
Designed, built, and launched an AI communication coach for interpreting messages, drafting replies, and improving tone. Built with OpenAI APIs, structured AI responses, Laravel, and Svelte, with Stripe subscriptions and usage credits.
BILLING · 2025
IPQualityScore
Making complex billing work.
Led delivery of a billing platform revamp within a two-engineer team, including checkout and credits. Also automated file retention and simplified application settings across PHP, Go, and Vue.
COMMUNICATIONS · 2018–2020
Olenka Management
A phone system rebuilt from scratch.
Rebuilt a Twilio-based phone system as the sole engineer, improving stability and performance while enabling new call features. Also built CRM-integrated task and timesheet tools and helped extend the company’s CRM into a SaaS product.
A person behind the code.
HI, I’M IEVGEN. YOU CAN CALL ME EUGENE.
Your project.
My full attention.
I’m the senior backend and full-stack engineer behind NEATCO. I started coding at 14 and bring 15+ years of professional experience building and modernizing production software.
My work spans SaaS, ecommerce, logistics, communications, and fraud prevention. I handle architecture, APIs, billing, automated testing, deployment, and production support.
I’ve also built and launched an AI product with OpenAI APIs. I can help turn AI into a useful feature, connect it to your existing systems, and automate repetitive workflows.
Based in the Denver area, I work remotely with businesses and teams on focused fixes, larger builds, and part-time engagements. You’ll work directly with me throughout.
Tell me what you’re working onTechnologies & integrations
PHP & Laravel
Python & Django
Go
JavaScript & TypeScript
Vue, Svelte & React
PostgreSQL, MySQL & Redis
AWS, Docker & CI/CD
OpenAI APIs
Stripe & Twilio
FROM PAST PROJECTS
Good work.
Good people to work with.
Ievgen is a talented software engineer who consistently finds innovative solutions to tough business problems. He's fluent in multiple programming languages, and he does a great job of balancing speed and thoroughness in designing and coding software.
Jim HarringtonPrincipal Software Engineer, Cart.com, Inc.
He’s focused on best practices, proper architecture, fast, maintainable & unique solutions.
Paul MorganLead Software Engineer, Cart.com, Inc.
Thanks to NEATCO, Live Client App has evolved from an idea to a complete, successful product!
Frank BryantCEO, Live Client LLC
Ievgen has engineered two impactful products for SNUC within a short amount of time.
Dan KnoxCIO, Simply NUC, Inc.
It’s been a pleasure to work with Ievgen for many years, his hard work speaks for himself.
Jim WiggintonCTO, Prescription Lifeline Inc.
Ievgen is reliable, self-motivated, good communicator and strives to deliver high-quality work.
Khaiersta EnglishFounder, Flower Press InteractiveJune 2018
Ievgen was able to target exactly what we wanted, and no part of scope was left out on his delivery.
Matt RabeSr. Engineering Lead, Flower Press InteractiveApril 2016
Feedback from past clients and colleagues.
A SIMPLE WAY TO WORK
Start with a conversation.
Leave with something done.
- 01
Talk it through
Tell me what you need, what’s getting in the way, and what a useful outcome looks like.
- 02
Agree on the next step
We’ll agree on scope, priorities, and budget. That might be a focused fix or the first milestone of a larger build.
- 03
Build, review, improve
I’ll do the work, keep you in the loop, and help with the handoff or ongoing support.
What size projects do you take on?
Everything from a small fix or website update to a larger custom application or full product build. We’ll talk through the scope, timing, and what’s needed to deliver it well.
Can you work on an existing application?
Yes. Tell me about the application, the technology it uses, and what you’d like to change. I’ll take a look and let you know whether I’m a good fit.
Can you help a few hours each week?
That’s exactly the kind of work I’m open to. We can discuss your priorities and agree on a schedule that works for both of us.
Can you help with AI or automation?
Yes. I’ve built a production AI product using OpenAI APIs and structured responses. I can help with AI features, API integrations, and repetitive workflows, including the account, usage, and billing features around them.
Can you handle deployment and support after launch?
Yes. I can handle deployment, troubleshoot production issues, and continue improving your application after launch. We’ll agree on the scope, availability, and level of ongoing support that fits your needs.
What technologies do you work with?
I work across the full application stack, including:
- Languages: PHP, Python, Go, JavaScript, TypeScript, and SQL.
- Backend: Laravel, Symfony, Django, Celery, REST APIs, OAuth, Webhooks, WebSockets, and queues, with MVC and object-oriented application design.
- Frontend: Svelte, Vue.js, React, Inertia.js, HTML, CSS, Tailwind CSS, and progressive web apps.
- Data and infrastructure: PostgreSQL, MySQL, MariaDB, Redis, AWS, serverless architecture, Docker, CI/CD, and Linux.
- AI and integrations: OpenAI APIs, structured LLM outputs, Stripe, Twilio, and third-party APIs.
- Quality and delivery: Automated testing, code review, debugging, Git, GitHub, Bitbucket, and Jira.
The right combination depends on your existing systems, project requirements, and maintenance needs.
How does pricing work?
It depends on the work and the level of support you need. Send a short description of the project and your budget, if you have one. We’ll agree on the scope and rate before any work begins.
LET’S GET SOMETHING DONE
What’s on
your to-do list?
A quick fix, a new product, or ongoing engineering help.
Tell me what you need, and we’ll take it from there.
ii@neatco.llc
A few lines about the work are enough to get started.
One-off projects, bigger builds & part-time collaborations