System

Andrii Shupta — Software Consultant and Developer

Build the product. Clarify the system.

I help teams turn ambiguous product and technical problems into systems that are easier to ship, change, and trust.

Write to me See how I can help

What I can help with

Bring me in when a product is moving quickly, the system is getting harder to change, or the team needs a clear technical path from idea to production.

Architecture & system design

Clarify boundaries, choose the right level of complexity, and design systems that can grow without becoming expensive to operate.

See related work

Software development

Build the critical parts of a product with a focus on maintainability, security, performance, and a clean path to the next release.

See related work

Technical direction

Turn competing opinions into decisions, unblock teams, review code and architecture, and leave behind a stronger engineering practice.

See related work

What clients say

Feedback from real engagements, kept short enough to read and clear enough to trust.

Client feedback

Selected feedback from real engagements.

Let’s have a call on Upwork
SR Upwork · Client feedback
5.0 / 5
“Andrii is very experienced and thoughtful in Next.js. He recommends best practices and will push back if something you require goes against that, as well as suggest a better way...”
  • Solution Oriented

Next.js CMS dashboard · solution-oriented

SR Upwork · Client feedback
5.0 / 5
“Excellent skill level, versed in Next.js.”
  • Committed to Quality
  • Next.js

CMS development using Next.js · long-term engagement

Client Upwork · Client feedback
5.0 / 5
“Quick and prompt help on an add-hoc need. Next step: preparing to continue with specific tasks.”
  • Reliable

Advisory help on Supabase setup

Client Upwork · Client feedback
5.0 / 5
“Andrii is a really good React.js developer, I hope to work with him again.”
  • Committed to Quality

React.js / Redux front-end development

Client Upwork · Client feedback
5.0 / 5
“Great consultant, very knowledgeable and proactive, highly recommended!”
  • Clear Communicator

Frontend developer · quick problem solution

A practical way of working

The engagement changes with the problem, but the principle stays the same: make the next decision visible, useful, and easy to act on.

  1. 01

    Understand the real problem

    Map the product context, constraints, system boundaries, and the decisions that are currently slowing the team down.

  2. 02

    Design a path forward

    Compare options, define a pragmatic architecture, and make trade-offs explicit before they become expensive.

  3. 03

    Ship and strengthen

    Work with the team through implementation, reviews, and production delivery so the result survives beyond the engagement.

Main technologies I work with

A practical stack starts with the problem, then grows from language and data to infrastructure.

Data / AI / LLM Applied intelligence Useful data and AI capabilities, chosen for the product outcome.
Third-party APIs External capabilities External services for payments, billing, and integrations.
Redis / CDN Performance layer Caching and edge delivery when a product needs a faster path.
TypeScript / JavaScript Product language The everyday language layer for full-stack product work.
PostgreSQL / Supabase Data foundation Reliable relational data, auth, and realtime features.
Cloud providers AWS / Cloudflare / Others Infrastructure shaped by delivery, security, and operations.
Best fit first The right technology for your product Choose the technology that fits the team, constraints, and product.

Not sure what fits?

Let’s choose a practical stack for the product you want to ship.

Write to me Let’s discuss on X

What teammates say

Recommendations from people who worked with me directly.

Teammate recommendations

Short recommendations from people I worked with directly.

Let’s connect on LinkedIn
Roksolana LinkedIn · Teammate recommendation
“Working with Andrii was a great experience. He is highly professional, reliable, and an excellent collaborator. Throughout our projects, he provided clear communication, valuable feedback, and maintained an efficient workflow...”

On cooperation

Darren LinkedIn · Teammate recommendation
“During his time supporting the England football teams, Andrii delivered across a number of projects that delivered real, measurable benefit to our stakeholders. He was consistent in his delivery throughout the engagement...”

Engineering manager

Bohdan LinkedIn · Teammate recommendation
“Andrii is a skilled software engineer and open-minded person. He is not afraid of challenges and new technologies. He always took a proactive approach, offering better technical solutions...”

Teammate recommendation

Work that shows the range

Selected situations from my engineering experience, reframed around the problem, the decision, and the outcome. Detailed case studies can live in the notes.

The FA Data platform / GCP

Making a complex data platform easier to evolve

Worked in a cross-functional product team on a modern cloud data platform, combining product development with technology discovery and migration work.

Related notes
LeapEvent Tech Tickets platform / modernization

Moving a legacy platform toward event-driven systems

Supported a PHP legacy system while helping shape its rewrite into a Node.js platform with event-driven development and Kafka.

Related notes
Snappy Payments / data migration

Scaling billing workflows without losing trust

Worked on billing and payment-account flows, including a migration of millions of database entities for thousands of customers.

Related notes

Public code people used

Three open-source projects that developers found useful, paired with the practical notes behind them. These are archived references, not active products.

Background behind the work

More on LinkedIn

  1. GlobalLogic

    • Principal Full Stack Developer March 2023 - February 2026 (3 years)

    The FA - English Football Association

    • Cross-functional product team developing a modern GCP-based data platform
    • Lead and participate in feature and product development
    • Data and technology migration/technology discovery
    Tech:
    • Google Cloud Platform
    • Terraform
    • BigQuery
    • React
    • Storybook
    • Fastify
    • PostgreSQL

    LeapEvent Tech(Patron Technology) - Tickets Platform

    • Support PHP legacy system
    • Rewrite to a new Node.js system with event-driven development with Kafka
    • Lead and participate in feature and product development
    Tech:
    • Node.js
    • Express
    • Kafka
    • MySQL(MariaDB)
    • Redis
    • PHP

  2. Intellias

    • Senior Full Stack Developer February 2021 - January 2023 (2 years)

    Sygnum - Web3 bank / Blockchain digital assets

    • Lead and play a key role in full-stack development
    • Develop a microservices architecture for a core proxy level for general product infrastructure
    Tech:
    • React
    • Node.js(NestJS)
    • AWS EC2
    • SNS/SQS
    • DynamoDB
    • Azure Active Directory
    • and others.

    Snappy - Gifting Experience Software

    • Feature and product development
    • Billing / Invoices and everything related to payment accounts
    • Migrated millions of database entities for thousands of customers
    • Helped with transitioning to the Agile/Scrum process
    Tech:
    • React
    • Node.js with AWS Lambda and StepFunctions
    • MongoDB Atlas
    • extensive StripeAPI usage

    Additionally, participated in hiring activities - 20+ interviews conducted

  3. EPAM Systems

    • Senior Full Stack Developer February 2020 - February 2021 (1 year 1 month)
    • Middle JavaScript Developer June 2019 - February 2020 (9 months)

    NDA - One of the biggest USA Credit Score companies

    • Lead front-end teams / sub-teams and play a key role in both FE and FS projects
    • Play part in the architecture of Angular / React / Node + AWS applications
    • Applied different Agile methodologies from previous experience
    Tech:
    • React
    • Node.js with AWS
    • Angular
    • PostgreSQL

    Additionally for EPAM:

    • Lectured on EPAM's events and R&D Lab
    • Played a part in the core team in the Mentorship program
    • Conducted over 15 interviews for FE and FE roles