Custom Software & AI Development

SquareOne Software
Web applications · Mobile apps · AI systems

Bring a new product to market, improve an existing platform, or add AI to your workflow. SquareOne brings planning, design, engineering, and ongoing support together for clients worldwide.

(02)clients

What Our Clients Say

(01)
★★★★★
It was a complex project. Even though it was hard to understand the codebase at the beginning, the partner quickly analyzed it and helped set clear priorities, so we were able to keep things on track without delays. What stood out most was that when issues came up, they didn’t just give a quick fix. They explained multiple options and the reasoning behind each one. Communication was clear, and they regularly shared detailed progress updates, which made collaboration very smooth. If I had to point out one downside, it would be that when the schedule was tight, they sometimes aimed for a bit more perfection than necessary. However, the upside was that the final quality was excellent. Overall, they were responsible, highly professional, and I’d definitely want to work with them again on the next project.
—zo*****
Verified client review · Wishket · 2026.01.20
(02)
★★★★★
This was a tough project without any reference point, and the timeline was extremely tight. They approached it like it was their own project—put real effort into planning, and constantly looked for the best possible solution. They also found a lot of information and details that I couldn’t have discovered on my own, which played a big role in making the project successful. The three scheduled meetings each week were always well-prepared and productive, and I’d especially like to recognize how much support and effort the team put in. This project succeeded because of them. The development team also had strong technical skills, so even with how challenging this was, they handled it very well. I’m confident that anyone who works with them will want to work with them again. I would recommend them without hesitation, and honestly, I want to do every future project with them. They’re truly one of the best professionals I’ve worked with.
—Pe******
Verified client review · Wishket · 2025.09.23
(03)
★★★★★
We started the project with a lot of uncertainty because the requirements were still changing and not fully organized, so I was honestly quite concerned at first. But as the work progressed, that concern gradually disappeared. What I appreciated most was that they did not just build what we asked for mechanically. They thought carefully about what would make the most sense from an actual service and operations perspective, and they proactively suggested better directions. Speed mattered, of course, but what impressed me even more was their communication style. They consistently shared progress in a transparent way, and whenever an issue came up, they did not try to gloss over it. Instead, they clearly explained the available options and the expected impact of each one, which made it much easier for us to make decisions with confidence. Even during the most time-sensitive parts of the schedule, they never seemed willing to compromise on quality, and the final result reflected that. It felt less like working with an outsourced development company and more like working with a true project partner. If we do a similar project again, they will be the first team I reach out to.
—mi******
Verified client review · Wishket · 2025.02.17
(04)
★★★★★
They were the true professionals. They pointed out details I hadn't considered, from a developer’s perspective, and they were incredibly thorough. During the project, for items that absolutely needed to be discussed, they pushed for proper alignment even if it meant spending more time rather than letting things slide. We didn’t have a formal “mid-project report” process, but in reality they were updating us almost every day, organizing what was needed and explaining it clearly. When necessary, they even presented directly. From the client side, this approach felt much safer and I was extremely satisfied. Thank you to the project manager, developers, and designers who worked on our project.
—an******
Verified client review · Wishket · 2024.05.27
(05)
★★★★★
This project involved building a React-based WYSIWYG editor, and then developing a customer-facing web application that collects responses through forms created with that editor. After we shared the requirements, they delivered the planning documents in a clean and structured way, and they reflected feedback well. We requested that the design deliverables be provided in Figma, and they were very accommodating. The design output was also neat and exactly what we wanted. They clearly have strong front-end capabilities, and both speed and quality were solid.
—gc******
Verified client review · Wishket · 2022.01.20
(06)
★★★★★
This was our first time running a project like this, and because the partner had prior experience, you could really feel their professionalism. They completed the work within the timeline we wanted, and communication across teams was smooth. The strong points were the satisfying end result and fast feedback. Most of all, I really appreciated how much effort they put in to meet the agreed schedule.
—it******
Verified client review · Wishket · 2021.11.17
←swipe★ 5.006 reviews
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(03)who we are

Built to last. Shipped worldwide.

15+
years of engineering, since 2009
100+
projects shipped
10+
years with our longest client
Top0.1%
Wishket Prime Partner
(04)case studies

Selected work

Three projects that show how we take responsibility for delivery, from first plan to live operation.

  1. / 03
    Hyundai Motor · N Virtual Cup

    Global Platform for Hyundai Motor’s Flagship Esports Competition

    Challenge
    A global virtual racing competition needed one platform for live race results, rankings, driver data, and event content across China, Korea, Europe, and North America.
    What we owned
    Platform design, React frontend, C# and Go backends, and the Assetto Corsa race-data integration.
    Delivery
    Delivered by a 13-person team: project manager, solution architect, designers, engineers, DevOps, and QA.
  2. / 03
    Korea Investment & Securities

    Multi-model AI Pipeline for Complex Financial Documents

    Challenge
    Complex English financial reports had to become editable Korean documents without losing tables, charts, or layout.
    What we owned
    A multi-model pipeline for document segmentation, finance-aware translation, and layout reconstruction.
    Delivery
    Output is editable DOCX that keeps nested tables and multi-column layouts, not flat extracted text.
  3. / 03
    Jeonbuk Hyundai Motors FC

    Official Football Club Mobile Application

    Challenge
    A professional K League club needed ticketing, memberships, live match updates, and fan services in one official app.
    What we owned
    Hybrid iOS and Android app (Ionic React), Java and Spring Boot backend, and the admin system.
    Delivery
    Includes identity verification, barcode and QR tickets, push alerts, and migration of existing members.
(05)services

How we help

Most clients come to us in one of four situations. Pick the one closest to yours.

(★)official partner
Stats Perform

Official partner

Stats Perform — the global sports data and AI company — is an official partner of Squareone. A partnership built on shipping and running products at world-class standards.

(06)what sets us apart

Why Squareone

FIG 0.101 / 06
(01)reason

Practical AI

We focus on AI that solves real business problems. That means building tools and systems that fit real workflows, support real teams, and create value beyond the prototype stage.

FIG 0.202 / 06
(02)reason

Tailored Solutions

Every business has different goals, systems, and constraints. We build software around what each client actually needs, not around one-size-fits-all templates.

FIG 0.303 / 06
(03)reason

Strong Execution

Good ideas only matter if they are delivered well. We put equal emphasis on planning, engineering quality, usability, and long-term maintainability.

FIG 0.404 / 06
(04)reason

Industry Understanding

We bring real domain knowledge across AI, finance, crypto, gaming, ecommerce, sports, and other fast-moving sectors. That helps us make better decisions and build solutions grounded in how each business actually works.

FIG 0.505 / 06
(05)reason

Built to Scale

Whether we are building for web, mobile, AI, or emerging technologies, we focus on creating products that are scalable, reliable, and ready to evolve over time.

FIG 0.606 / 06
(06)reason

Long-Term Partnership

We aim to be more than a delivery partner. We take ownership, communicate clearly, and build with the care needed to support lasting products and long-term relationships.

(07)tech stack

Tools we use

AI Engineering

(01)

Claude / GPT / Gemini / Llama / LangGraph / MCP / LlamaIndex / Langfuse / Moshi / LiveKit / Cartesia / ElevenLabs / Whisper / SAM 2 / YOLO / FLUX / Sora / Docling / ColPali / pgvector / vLLM / Unsloth

Mobile

(02)

React Native / Expo / SwiftUI / Jetpack Compose / Kotlin Multiplatform / Flutter

Data and Infrastructure

(03)

PostgreSQL / MySQL / MongoDB / Clickhouse / Redis / Elasticsearch / RabbitMQ / Kafka

Cloud and DevOps

(04)

Amazon Web Services / Docker / Kubernetes / Terraform / GitHub Actions

Blockchain / Web3

(05)

Solidity / Rust / Anchor / Hardhat / Foundry / Ethers.js / Viem / Solana Web3.js / SPL Token / Metaplex / OpenZeppelin / ERC-20 / ERC-721 / ERC-1155 / ERC-165 / ERC-173 / ERC-2981 / ERC-4337

Gaming / Real-Time

(06)

Unity / Unreal Engine / Godot / Three.js / React Three Fiber / WebGPU / PixiJS / WebRTC / Colyseus

Front-End

(07)

React / Next.js / TanStack / TypeScript / Vite / Tailwind CSS v4 / shadcn/ui / Motion

Back-End

(08)

Python (FastAPI) / Node.js / C# / Go / Rust (Axum) / gRPC / GraphQL / tRPC

Design

(09)

Figma / Framer / Spline / Blender / After Effects / Midjourney