U1CORE

London, United Kingdom

U1CORE — A product studio for multi-sided platforms. Marketplaces, exchanges, auctions, fundraising

YOUR PARTNER TO BUILD MULTI-SIDED PLATFORMS U1CORE is a product studio for the products where buyers, sellers, and operators meet, transact, and trust each other. Marketplaces, exchanges, auction systems, fundraising platforms, and operational CRMs with multi-role logic. 🔔 Book a Free Call: https://calendly.com/hello-u1core/30min or visit our website - https://www.u1core.com/ OUR SERVICES: Product Design — UI/UX, design systems, prototyping, user testing, platform-native patterns for marketplaces, auctions, exchanges, and donation flows Product Engineering — React, Next.js, Vue on the front; Node.js, Python, .NET on the back; mobile, payment integrations, multi-role architecture, admin tooling, DevOps Discovery & Platform Strategy — Cold-start strategy, trust and safety architecture, take-rate modeling, MVP scoping, UX audits, platform mechanics workshops Custom Development — Marketing sites and landing pages for platform companies, paired with the product engagement Why U1CORE: We pick a lane. Marketplaces, exchanges, auctions, donation platforms and almost nothing else. Founders come to us because we already know how their product breaks. One team, no relay race. Senior designers and engineers on the same project, kickoff to launch. The thing you ship is the thing we built nothing lost in handoff to a second studio. Built for the day it gets used. Multi-role flows, payments, admin tooling, infrastructure that holds up at peak load. We design for the brief and engineer for the day after. Receipts. $720M+ processed through one platform. Millions of listings on another. Our work has been recognised by CSS Design Awards (2× Site of the Day, 4× Best UX, 4× Best UI, 4× Best Innovation, 4× Special Kudos), Orpetron, TOP 10 Design Company in Dribbble! More than 300 clients have trusted us with their products. If your product has multiple types of users exchanging real value, and getting the platform right changes outcomes — let's talk.

40 people in their team

Speaks English

76 projects in their portfolio

1 collaboration started on Sortlist

Works remotely across the globe

Sortlist member since 2025

Founded in 2023

21 awards conferred

5/5

(12 reviews)

Open website

Services

6 services offered by U1CORE

Description
Great Products Feel Effortless. Ours Do Too. U1CORE crafts user experiences that remove friction and drive action. Through research, wireframing, and iterative testing, we design interfaces people actually enjoy and that quietly move them toward your business goals.
Skills in Ergonomy (UX/UI) (30)
UX DesignUI DesignDesign ThinkingUsability TestingUser ResearchUser TestingUser JourneyCustomer Journey MappingInteraction DesignMobile App UI Design+20
Works in Ergonomy (UX/UI) (73)
Review in Ergonomy (UX/UI) (1)
Yaryna Vdovyn
Clients in Ergonomy (UX/UI) (4)
TroveE-commerce | international
Islamic HelpNon-profit | international
Sedona PremierHospitals & Healthcare
FrandexE-commerce | international
Learn more about Ergonomy (UX/UI)
Description
Your Business Logic, Built Into Reliable Software. U1Core develops custom software that fits the way your business actually works from CRM integrations and enterprise platforms to mobile apps and IoT solutions. We build it right, so you don't have to rebuild it later.
Skills in Software Development (30)
ProgrammaticA/B TestingCustom Software DevelopmentHubSpot IntegrationSwift App DevelopmentSoftware EngineeringSoftware ArchitectureOffshore Software DevelopmentCRM ConsultingDPO Consulting+20
Works in Software Development (27)
Clients in Software Development (4)
PROMATAReal Estate | international
PaynexSoftware & Computer Services | international
PulseBanking & Financials | international
EmberHospitals & Healthcare | international
Learn more about Software Development
Description
Website Creation We design and build websites that turn visitors into qualified leads — not just beautiful interfaces, but conversion-focused digital products built around your business goals. At U1CORE, website creation starts with strategy. Before we open Figma, we analyze your market, your competitors, and the specific behavior of your target audience. Every section, every headline, every call to action is designed with one purpose: to make the right person take the next step. What we deliver: We cover the full cycle — from discovery and information architecture to high-fidelity UI design, responsive development across all devices, and post-launch support. Our process includes deep UX research, wireframing, concept development, and multiple rounds of refinement to ensure the final product matches your vision and exceeds your performance expectations. Every website we build includes a complete design system — reusable components, states, and documentation — so your team can scale the product without starting from scratch each time. Where we specialize: Our strongest results come from complex, multi-layered web products: platforms where multiple types of users interact (buyers and sellers, donors and organizations, operators and clients), SaaS products, corporate websites for funded startups, and high-stakes landing pages where conversion directly impacts revenue. We have built products that processed over $720 million in transactions. We understand that a website is not a deliverable — it is a business tool, and we treat it accordingly. Our process: We begin every engagement with a discovery phase — understanding your business model, your users, and the specific outcomes you need the website to drive. From there we move through wireframes, design concepts, UI refinement, and development, with clear milestones and structured feedback rounds at every stage. You always know where the project stands and what comes next. Technologies and stack: We work with Webflow, WordPress, and custom React and Next.js development depending on the complexity and scalability requirements of your project. We also handle all necessary third-party integrations — CRM connections, analytics, payment systems, and marketing tools. Results we focus on: Increased conversion rate from visitor to lead. Reduced bounce rate through clear messaging and intuitive navigation. Faster load times and Core Web Vitals scores that support SEO performance. A visual identity that positions you credibly in front of the right audience. Minimum engagement: $5,000 Timeline: 4 to 12 weeks depending on scope Deliverables: Strategy document, wireframes, UI design (desktop + mobile), design system, developed and deployed website, handoff documentation
Skills in Website Creation (13)
Website DevelopmentResponsive Web DesignWeb ContentSmall Business Web DesignWeb Hosting ManagementWebsite OptimizationMultilingual WebsiteWebsite DesignDark Mode DesignLoading Time Optimization+3
Works in Website Creation (5)
Reviews in Website Creation (4)
Iryna Yurchenko
Anastasiia Cherednichenko
Andrii Pohibko
Elizabeth Jepsen
Clients in Website Creation (4)
TroveE-commerce | international
Islamic HelpNon-profit | international
Sedona PremierHospitals & Healthcare
FrandexE-commerce | international
Learn more about Website Creation
Description
**Mobile App Development** Building a mobile app is not about writing code. It is about creating a product that users open, understand and come back to — and that generates measurable results for your business from day one. At U1CORE, mobile app development starts with your business objective. Before a single screen is designed or a line of code is written, we map the core user journey, define the success metrics and establish what the app needs to do for your revenue, retention and growth. Every decision that follows — from architecture to onboarding flow to notification strategy — traces back to those outcomes. **What we build** We develop native and cross-platform mobile applications for iOS and Android across a wide range of product types: marketplace and multi-sided platforms where multiple user groups interact, donation and fundraising applications, financial and fintech products, SaaS mobile extensions, e-commerce and auction systems, and enterprise tools for internal operations. Our strongest results come from products where the experience between two or more sides of a platform determines whether the business model works. If your app connects buyers and sellers, donors and organisations, operators and end users — we understand that dynamic and design for it. **Our process** We begin with discovery: understanding your users, your competitors and the specific friction points that cause drop-off, low retention or low conversion in your category. From there we move into UX architecture and wireframing, followed by high-fidelity UI design and a clickable prototype for validation before development begins. Development follows an iterative sprint model with continuous delivery and testing. We handle the full technical stack — frontend, backend, API integrations, payment systems, push notifications, analytics and third-party services. Before release we conduct structured QA across devices and operating system versions, manage App Store and Google Play submission, and monitor the first weeks post-launch to catch and resolve any issues quickly. **Technology** We work with React Native and Flutter for cross-platform products where speed to market and budget efficiency are priorities, and with Swift and Kotlin for native iOS and Android builds where performance and platform-specific capabilities matter. Our backend stack is selected based on scalability requirements, your existing infrastructure and the complexity of your data architecture. Every app we deliver includes clean API documentation, a maintainable codebase and either a handoff package for your internal team or an ongoing support agreement with us. **Results we focus on** Activation rate — how many users complete onboarding and reach the core value of your product. Retention — how many return after day one, day seven and day thirty. Conversion — how many users complete the action your business model depends on. Store rating — which directly affects organic discovery and download volume. We have built a fundraising platform that processed $720 million in a single month. We have built auction systems that replaced manual offline processes and allowed one manager to serve hundreds of clients simultaneously. We have built fintech tools that reduced operational headcount while increasing transaction volume. **Minimum engagement:** $8,000 **Timeline:** 8 to 20 weeks depending on scope and platform **Deliverables:** Product strategy document, UX wireframes, UI design system, developed and tested application for iOS and Android, App Store and Google Play submission, post-launch support period, full technical handoff documentation
Skills in Mobile App (8)
React Native DevelopmentApplication DevelopmentAndroid App DevelopmentMobile PrototypingApp DesigningChatbot DevelopmentApp LocalizationiOS App Development
Learn more about Mobile App
Description
**Web Application Development** A web application is not a website. It is a product that users log into, operate and rely on to run part of their work or their life. It handles real data, real transactions and real decisions — which means every architectural choice, every interface pattern and every performance decision has a direct consequence on whether your business works. At U1CORE, web application development is built around one question: what does this product need to do for your users and your revenue that it cannot afford to get wrong? The answer to that question drives every technical and design decision we make from kickoff to launch. **What we build** We develop web applications across a wide range of product categories: marketplace and multi-sided platforms connecting buyers, sellers and operators, SaaS products and internal tools, donation and fundraising systems, exchange and auction platforms, fintech dashboards and financial management interfaces, CRM and ERP systems, client portals and B2B platforms. Our deepest expertise is in products where complexity lives in the relationship between user groups. If your web application serves two or more types of users with different permissions, different flows and different incentives — operator and client, buyer and seller, donor and organisation — we understand how to design and build for that architecture. This is where most teams underestimate the scope and where most products develop the friction that limits growth. **Our process** We begin with a structured discovery phase. We map your business model, your user segments and the specific flows that determine whether your product creates or destroys value. We study your competitors, identify what works in your category and define the metrics that will tell us whether the product is succeeding after launch. From discovery we move into information architecture and UX design — how the product is structured, how users navigate it and how every screen earns its place in the journey. We prototype before we build. You see the product working before any production code is written, which eliminates the most expensive category of mistake: building the wrong thing correctly. Development follows an agile sprint model with continuous delivery to a staging environment. You see progress every two weeks. You test real functionality. You give feedback on what is working and what needs to change while the cost of change is still low. We handle the complete technical stack — frontend architecture, backend systems, databases, API design and third-party integrations including payment gateways, CRM systems, analytics platforms, authentication providers and any service your product depends on. Infrastructure setup, security configuration, performance optimisation and deployment pipeline are included as standard — not added later as afterthoughts. Before launch we conduct structured QA across browsers, devices and user scenarios. We test edge cases, error states and failure conditions because real users will find them. After launch we monitor performance, track the metrics we defined in discovery and remain available for rapid response if something requires attention. **Technology** Our frontend stack is built on React and Next.js for products that require performance, SEO visibility and scalable component architecture. For backend systems we work with Node.js, Python and appropriate database architectures — relational or document-based depending on your data model and query requirements. For content-driven products that need non-technical teams to manage and update content without developer involvement, we implement headless CMS solutions that give your team full control without touching code. We select the stack based on your product's specific requirements — scalability targets, existing infrastructure, team capabilities and timeline — not on what we are comfortable with by default. We recommend the solution that gives you the best outcome over the next three years, not the most impressive technical specification on paper. **What separates good web applications from ones that fail** Most web application projects fail for the same reasons. Scope that was not properly defined at the start. Architecture decisions that made sense at ten users and broke at ten thousand. Onboarding that assumed users would figure it out. Performance that worked in testing and collapsed under real load. Security that was never properly considered until something went wrong. We have seen all of these. Our process is designed to remove each one before it becomes a problem. Discovery removes scope failure. Prototyping removes architecture and UX failure. Sprint-based delivery removes delivery failure. Post-launch monitoring removes performance and stability failure. **Results we focus on** User activation — how many people who sign up actually reach the core value of your product. Session depth — how far users go and how much of the product they engage with. Transaction completion — what percentage of users finish the action your business model depends on. System reliability — uptime, response time and error rate under real load. We built the platform that processed $720 million in donations in a single month. We built auction systems that digitalised offline processes and multiplied the scale at which operators can work. We built financial tools that reduced manual work while increasing the volume of transactions the business could handle. In each case the result was not a delivered application — it was a measurable change in what the business could do. **Minimum engagement:** $8,000 **Timeline:** 10 to 24 weeks depending on scope and complexity **Deliverables:** Discovery and product strategy document, information architecture, UX wireframes, UI design system, fully developed and tested web application, infrastructure setup and deployment, third-party integrations, QA documentation, post-launch monitoring period, technical handoff documentation and codebase
Skills in Web Application (13)
Web DevelopmentProgrammingResponsive DesignDevOpsProgressive Web AppBot DevelopmentFull Stack DevelopmentWordpress DevelopmentWeb Application DevelopmentPrototype Development+3
Learn more about Web Application
Description
**Brand Identity Design** A brand is not a logo. It is the reason someone chooses you over an alternative that does roughly the same thing at roughly the same price. It is what makes a first impression land as credible, premium and trustworthy before a single word is read — and what makes a returning customer feel like they are in the right place every time they come back. At U1CORE, brand identity work starts with a business problem. Who needs to trust you, and what do they need to feel in order to do so? What do you charge, and does your brand justify that number? Where do you want to be in three years, and does your current identity have the range to get you there? The answers to these questions determine every creative decision that follows. **What we design** We create complete brand identity systems for companies building platforms, digital products and technology businesses. Our work covers brand strategy and positioning, logo design and visual mark development, typography systems, colour architecture, iconography and illustration direction, motion and animation identity, brand voice and messaging frameworks, and the full suite of applications across digital and physical touchpoints. We work with companies at different stages. Early-stage startups that need to build credibility and attract investment from a position of having nothing yet. Growth-stage businesses that have outgrown their original identity and need a visual language that matches where they are going. Established companies launching new products or entering new markets where their existing brand does not translate. **Our process** We begin with a brand discovery session — a structured conversation about your business model, your customers, your competitors and the specific perception you need to create. We ask who your ideal customer is and what they need to feel before they trust you with their money. We ask what your competitors look like and where the visual white space in your category is. We ask what premium means in your market and whether your brand currently signals that you belong there. From discovery we move into research and competitive analysis. We map the visual landscape of your category — what signals trust, what signals innovation, what signals credibility and what signals that a brand is trying too hard. This is not inspiration gathering. It is strategic intelligence that tells us exactly where your brand needs to position visually to stand apart from the right alternatives. We then develop moodboards — not as decoration but as a tool for aligning on visual direction before any design begins. A moodboard conversation saves weeks of revision later. It establishes the emotional register, the level of sophistication, the energy and the tone that the identity needs to carry before the first logo sketch is drawn. From there we develop two or three distinct brand concepts. Not variations of the same idea — genuinely different strategic directions, each with its own logic and its own argument for why it is the right answer for your business. Each concept is presented with rationale, not just aesthetics. You understand not just what we designed but why — and why the alternative directions were set aside. The chosen concept is then developed into a complete identity system. Logo in all required lockups and orientations. Colour system with primary, secondary and functional palettes and usage rules. Typography system with hierarchy, weights and digital specifications. Iconography and supporting visual elements. Motion guidelines if animation is relevant to your product. Application across your most important touchpoints — website headers, app interfaces, pitch decks, social media, email and any physical materials you need. We deliver a brand guidelines document that gives your team and any future design partners everything they need to use the identity correctly and consistently without coming back to us for every decision. **What makes a brand worth money** The brands that command premium pricing share specific characteristics. They have a coherent point of view — every visual decision feels like it came from the same mind. They are specific — they do not try to appeal to everyone, which means the right people feel immediately that they have found something made for them. They are consistent — the experience of encountering the brand anywhere feels like the same experience. And they are honest — the visual language matches the actual product, the actual team and the actual ambition. We built the visual identity for products that raised investment rounds. We designed brands that allowed our clients to increase their prices because their product now looked like it was worth more. We created identities for platforms where the trust signal between two sides of a marketplace — the feeling that this is a serious, reliable place to transact — was the difference between users completing a purchase and leaving. A brand that communicates the wrong thing about your business is not a neutral problem. It actively costs you revenue by disqualifying you from conversations you should be winning. The right brand identity is not an expense. It is the multiplier on everything else you do. **Minimum engagement:** $3,500 **Timeline:** 4 to 8 weeks depending on scope **Deliverables:** Brand discovery session, competitive and visual landscape analysis, moodboards, two to three brand concepts with strategic rationale, full development of chosen direction, complete brand identity system, brand guidelines document, all source files in vector format, application to agreed touchpoints
Skills in Branding & Positioning (25)
BrandingCorporate IdentityBrand StrategyBrand IdentityBrand DevelopmentBrand ManagementBrand NamingBrand ExperienceBrand MarketingBrand Design+15
Learn more about Branding & Positioning

Team

40 members in U1CORE's team

StoryWe are a team that builds successful Go-To-Market solutions. Developing customized Go-To-Market strategies that drive product success and accelerate growth in competitive markets.

Awards

U1CORE was awarded 21 times

CSSDA - Best Innovation - Carcompany.ai2026-06-01Best Innovation

CSSDA - Best UX - Carcompany.ai2026-06-01Best UX

CSSDA - Best UI - Carcompany.ai2026-06-01Best UI

CSSDA - SPECIAL Kudos - Carcompany.ai2026-06-01SPECIAL Kudos

Reviews

12 reviews for U1CORE

5/5

(12 reviews)

Elizabeth JepsenChief of Staff at carcompany.ai

5/5

Budget

Quality

Schedule

Collaboration

What was the objective behind your collaboration?We needed to design and launch our companies first website on a very compressed timeline. The objective was to get a polished, market-ready site live fast — and then iterate, moving from our initial launch into a refined V2 and then V3.

What did you enjoy the most during your collaboration?Two things stood out. First, their responsiveness and communication — they worked around the clock to meet our deadlines and kept us updated throughout over both email and Slack. Second, their patience: as we moved into V2, they absorbed round after round of edits without friction.

Are there any areas for improvements?N/A

Elizabeth Jepsen recommends this agency

ServiceWebsite Creation

SectorTransportation

Andrii PohibkoCEO at Inboxio

5/5

U1CORE's work helped the client increase inquiries and lead generation, improve customer confidence, and better position themselves in the market. The team was very organized, delivered on time, and had a structured approach with a clear timeline. They also provided regular progress updates.

ServiceWebsite Creation

Anastasiia CherednichenkoPM at DevIT

5/5

Budget

Quality

Schedule

Collaboration

What was the objective behind your collaboration?We needed a complete brand overhaul—our visual identity looked outdated and inconsistent across all touchpoints. The goal was to establish a clear and recognizable brand positioning that would resonate with our target audience and allow us to stand out from competitors in a crowded market.

What did you enjoy the most during your collaboration?What impressed us most was the care and attention the U1CORE team took to understand our business before tackling any aspect of the design. They asked the right questions, constructively challenged our assumptions, and translated our vision into a cohesive brand identity that we truly love. Communication throughout the entire process was flawless—always prompt, proactive, and transparent. It felt less like working with an agency and more like working with a strategic partner on our side.

Are there any areas for improvements?Nothing out of the ordinary to report. We had a tight schedule, and the team handled it professionally.

Anastasiia Cherednichenko recommends this agency

ServiceWebsite Creation

Team51 - 200

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Contact

Contact details of U1CORE

Details

https://www.u1core.com/?utm_source=sortlist&utm_medium=referral

HeadquarterU1CORE, City Road, London, UK