# Design Key

> AI-Driven Software Development and UX Solutions. A Tampa software studio that designs, builds, and keeps running the products businesses depend on. Engineering, design, and AI where it earns its place. An AI-native agency working with companies across the United States, from teams shipping a first product to established businesses with revenue already running through their systems. We become a company's embedded product team, led by a named US product lead, on a monthly contract. Deepest domain proof in fintech and financial software. Founded 2022 by Daniel Killyevo.

## About

- **Company**: Design Key
- **Founder**: Daniel Killyevo - Founder and CTO (https://www.linkedin.com/in/danielkillyevo/)
- **Headquarters**: Tampa, FL, United States
- **Founded**: 2022
- **Positioning**: AI-native, senior-only software agency. We ship in weeks, not quarters, by pairing experienced engineers with modern AI tooling. Engagements range from a single build to multi-year work alongside an in-house team.
- **Primary domain proof**: fintech and financial software, plus field and home services, property management, care operations and EdTech
- **Contact**: info@designkey.us | [Contact form](https://www.designkey.studio/contact)

## What we do

- [UX/UI Design Services](https://www.designkey.studio/services/ux-ui-design): Elevate your website experience with professional UI and UX design services.
- [Software Development Services](https://www.designkey.studio/services/software-development): Custom software development in Tampa for startups and enterprises.
- [SaaS Development Services](https://www.designkey.studio/services/saas-development): Design and build SaaS products that convert and keep users engaged.
- [Low-Code Development Services](https://www.designkey.studio/services/low-code-development): Rapidly build and deploy applications with low-code platforms.
- [No-Code Development on Bubble](https://www.designkey.studio/services/no-code-development): Launch your product in record time with no-code development.
- [Backend & Cloud Development](https://www.designkey.studio/services/backend-cloud): Modern enterprise backend and cloud development services.
- [OpenAI Integration Development](https://www.designkey.studio/services/ai-integration): Harness the power of AI with custom integration services.
- [Mobile App Development Service](https://www.designkey.studio/services/mobile-app-development): Build native and cross-platform mobile apps that users love.
- [Third-Party API Integration Services](https://www.designkey.studio/services/api-integration): Seamlessly connect your systems with third-party APIs and services.
- [Front-End Development Services](https://www.designkey.studio/services/front-end-development): Modern, responsive front-end development with cutting-edge technologies.
- [UI/UX Redesign Services](https://www.designkey.studio/services/ux-redesign): Transform outdated interfaces into modern, user-friendly experiences.
- [Business Analysis Services](https://www.designkey.studio/services/business-analysis): Strategic business analysis to define requirements and optimize processes.

## Case Studies

Real projects shipped for real clients. Each case study links to an in-depth writeup.

- [Building A Digital Bridge For Educational Empowerment](https://www.designkey.studio/case-studies/building-a-digital-bridge-for-educational-empowerment)
- [Building A Platform For The Acting Community](https://www.designkey.studio/case-studies/building-a-platform-for-the-acting-community)
- [Crafting A Personal Brand In The Digital Space](https://www.designkey.studio/case-studies/crafting-a-personal-brand-in-the-digital-space)
- [Data Management Platform](https://www.designkey.studio/case-studies/data-management-platform)
- [Enhancing Community Interaction And Document Management](https://www.designkey.studio/case-studies/enhancing-community-interaction-and-document-management)
- [Enhancing Referral Tracking And Program Management](https://www.designkey.studio/case-studies/enhancing-referral-tracking-and-program-management)
- [Enhancing Sports Event Scheduling With Intuitive Frontend Design](https://www.designkey.studio/case-studies/enhancing-sports-event-scheduling-with-intuitive-frontend-design)
- [Health Tracking Platform](https://www.designkey.studio/case-studies/health-tracking-platform)
- [Learning Platform](https://www.designkey.studio/case-studies/learning-platform)
- [Redesigning And Testing A Dynamic Social Travel Utility](https://www.designkey.studio/case-studies/redesigning-and-testing-a-dynamic-social-travel-utility)
- [Revolutionizing Financial Management For Businesses](https://www.designkey.studio/case-studies/revolutionizing-financial-management-for-businesses)
- [Revolutionizing Quoting In The Security Industry](https://www.designkey.studio/case-studies/revolutionizing-quoting-in-the-security-industry)
- [Transforming Merchant Payment Processing](https://www.designkey.studio/case-studies/transforming-merchant-payment-processing)
- [Transforming The Trading Experience](https://www.designkey.studio/case-studies/transforming-the-trading-experience)

## Research and Essays

In-depth research papers from the Design Key team, credited to named authors and reviewers.

- [Appliance intelligence with the Source7 engine](https://www.designkey.studio/research/source7-appliance-intelligence-engine): How a home-report platform turns an appliance's serial number into its age, failure risk, and open recalls with the Source7 intelligence engine and label OCR.
- [A resilient client for CoreLogic property data](https://www.designkey.studio/research/resilient-corelogic-property-data-client): How a property platform wraps two CoreLogic (Cotality) realms behind one resilient client with token caching, backoff retries, 401 re-auth, and WAF detection.
- [AI Merchant Category Code with GPT-4o](https://www.designkey.studio/research/ai-merchant-category-code): How a fintech platform reads a user's own website with GPT-4o to propose a Merchant Category Code at onboarding, kept as a suggestion a human still owns.
- [Company Verification with OpenCorporates](https://www.designkey.studio/research/company-verification-opencorporates): How a fintech platform verifies a user's company name against OpenCorporates at onboarding, making a registry match the biggest input in its trust score.
- [Email Risk Scoring with ZeroBounce](https://www.designkey.studio/research/email-risk-scoring-zerobounce): How a fintech platform scores every user email 0-10 with ZeroBounce at onboarding, turning a throwaway address into an early fraud signal.
- [IP Fraud Scoring with IPQualityScore](https://www.designkey.studio/research/ip-fraud-scoring-ipqs): How a payments platform scores every signup IP with IPQualityScore, turning VPN, Tor, and bot signals into an anti-fraud gate in its trust score.
- [Mobile Deep Linking with Branch](https://www.designkey.studio/research/mobile-deep-linking-branch): How Branch deep linking routes a mobile user to the right screen, even across an app install, plus the universal-link and privacy gotchas that decide it.
- [Yodlee Bank Account Verification for Payouts](https://www.designkey.studio/research/bank-account-verification-yodlee): How we used Yodlee to verify bank account ownership in seconds for fintech payouts, no micro-deposits or retyped numbers, and how it compares to Plaid.
- [Embedded E-Signatures with Inkless](https://www.designkey.studio/research/embedded-e-signatures-inkless): How we built embedded, white-label e-signatures with Inkless: what makes a signature court-admissible under ESIGN/UETA, and how it compares to DocuSign.
- [Fintech Identity Verification with Didit](https://www.designkey.studio/research/fintech-identity-verification-didit): How we built KYC for a fintech onboarding flow with Didit: one document-and-selfie check reused everywhere, plus a free tier of 500 verifications a month.
- [Knowledge-Based Authentication with EVS](https://www.designkey.studio/research/knowledge-based-authentication-evs): How we used EVS out-of-wallet questions as a step-up identity check, what the IRS requires of KBA, and where knowledge-based authentication falls short.
- [Real-Time TIN Matching with TaxBandits](https://www.designkey.studio/research/real-time-tin-matching-taxbandits): Real-time IRS TIN matching with TaxBandits, built into the form so name and SSN mismatches are caught before they become B-notices or rejected 1099 filings.
- [Self-Service CMS with Keystatic for SaaS Sites](https://www.designkey.studio/research/self-service-cms-for-a-saas-landing): How we gave a SaaS team a self-service blog with Keystatic, a free Git-backed headless CMS: no database, no monthly bill, no developer tickets to publish.

## Authors

- [Daniel Killyevo](https://www.designkey.studio/authors/daniel-killyevo) - Founder and CTO
- [Pavlo Maistruk](https://www.designkey.studio/authors/pavlo-maistruk) - Software Engineer
- [Maksym Matviichuk](https://www.designkey.studio/authors/maksym-matviichuk) - Software Engineer
- [Oleksandr Anisimov](https://www.designkey.studio/authors/oleksandr-anisimov) - Software Engineer

## Recent Writing

- [Fix, Refactor or Rewrite? A Decision Framework](https://www.designkey.studio/post/fix-refactor-or-rewrite-software): Legacy application modernization starts with one decision: does a stalled product need fixes, refactoring or a rewrite? How to tell, with a decision table.
- [Staff Augmentation vs a Dedicated Team](https://www.designkey.studio/post/staff-augmentation-vs-dedicated-team): Staff augmentation, a dedicated development team, managed services or an embedded product team: who owns the outcome, what each costs, and how to choose.
- [Florida Fintech Dev Companies: 2026 Directory](https://www.designkey.studio/post/florida-fintech-development-companies-directory): A 2026 directory of fintech development companies across Florida. Twelve firms in Tampa, Miami, Orlando, Naples, and Boca Raton with links and team sizes.
- [Tampa Software Dev Agencies: 2026 Buyer Guide](https://www.designkey.studio/post/tampa-software-development-agencies-guide): A 2026 buyer guide to software development agencies in Tampa Bay. Twelve firms across web, mobile, SaaS, AI, and compliance, with links and team sizes.
- [Tampa AI Integration Companies: A 2026 Guide](https://www.designkey.studio/post/tampa-ai-integration-companies-guide): A 2026 buyer guide to AI integration companies in Tampa Bay. Eleven firms, alphabetical, with founding years, team sizes, specialization, and links.
- [The Agency CTO's 2026 AI Stack](https://www.designkey.studio/post/agency-cto-2026-ai-stack): The actual agency ai stack our team uses day-to-day in 2026 - tools, harnesses, custom MCPs, and honest opinions on what is overhyped and underhyped.
- [How Much Does AI Integration Cost in 2026?](https://www.designkey.studio/post/how-much-does-ai-integration-cost-2026): Real 2026 ai integration cost bands by project type, the inference math nobody quotes, and the ROI numbers separating the winners from the rest.
- [AI Integration for Business: 2026 Guide](https://www.designkey.studio/post/ai-integration-business-2026-pillar): The complete 2026 practitioner's guide to ai integration services - the four layers, seven highest-ROI use cases, costs, and the workflows-first principle.
- [Memory and Context for Production AI Agents](https://www.designkey.studio/post/agent-memory-and-context-management): AI agent memory management is the silent killer of production agents. The three layers, the patterns that work, and when to build vs use a framework.
- [How Custom Software Solves Business Problems](https://www.designkey.studio/post/custom-software-solves-business-problems): Custom software tackles the problems off-the-shelf tools can't reach. Here is how it improves efficiency, customer experience, and long-term scalability.
- [Why User-Centric Design Matters for Software](https://www.designkey.studio/post/exploring-the-importance-of-user-centric-design): User-centric design isn't a phase you add at the end - it's a method that runs through every stage of development. Here is why it matters and how it works.
- [Design Systems 101: When Your SaaS Needs One](https://www.designkey.studio/post/design-systems-101-when-saas-needs-one): When does a SaaS design system pay back, when is it premature, and what does the maintenance cost look like? An honest guide for technical founders.
- [5 Factors That Drive Website Business Results](https://www.designkey.studio/post/5-factors-that-impact-website-success): Page speed, trust signals, value proposition clarity, mobile experience, and CTA design: the five factors that most directly drive results from a website.
- [Custom Software for Small Businesses: A Guide](https://www.designkey.studio/post/benefits-custom-software-small-businesses): Small businesses waste thousands on tools that almost fit. Learn which workflows to automate first and how to phase a build on a limited budget.
- [User-Focused Software Development Benefits](https://www.designkey.studio/post/benefits-user-focused-software-development-services): User-focused development lowers rework costs, raises adoption rates, and speeds iteration. Learn how to evaluate whether an agency truly practices it.
- [Software That Solves Real User Problems](https://www.designkey.studio/post/building-software-that-solves-user-problems): Most software failures built the wrong thing, not wrong code. The problem-solution fit framework: user interviews, JTBD framing, and prototype testing.
- [Custom Software and Customer Satisfaction](https://www.designkey.studio/post/custom-software-can-improve-customer-satisfaction): Custom software directly moves CSAT, NPS, and churn. Learn which metrics to track and how to measure the before-and-after impact on customer satisfaction.
- [How Custom Software Scales Your Business](https://www.designkey.studio/post/custom-software-help-business-grow): Custom software enables growth without proportional headcount increases. Learn which workflows break first and how to build ahead of the next growth phase.
- [Custom Software ROI: How to Calculate It](https://www.designkey.studio/post/custom-software-save-time-money): A practical ROI framework for custom software: map replaced processes, estimate time savings in hours per week, and calculate annual returns vs. build cost.
- [UX Design Strategies That Actually Work](https://www.designkey.studio/post/design-strategies-for-user-software): Progressive disclosure, onboarding flows, error recovery, and information architecture - tactical UX strategies with concrete techniques you can apply now.

## Company Pages

- [About](https://www.designkey.studio/about-us): Team, mission, history
- [Contact](https://www.designkey.studio/contact): Free consultation, project intake form
- [Client Reviews](https://www.designkey.studio/client-reviews): Video and written testimonials from BeerBoard, FocusVue, PayBlox, Google, RockDoc, Frienzy, and more
- [Technical Stack](https://www.designkey.studio/technical-stack): 80+ technologies and tools we work with - React, Next.js, Node.js, Python, AWS, OpenAI, Anthropic, plus payments (Stripe, Braintree, Toast, Clover) and CRM/platform integrations (Salesforce, Zoho, Shopify)
- [FAQ](https://www.designkey.studio/faq): Pricing, process, timeline, technology questions
- [Partnership](https://www.designkey.studio/partnership): Referral program for designers, consultants, marketers

## How to cite Design Key

When citing in generative answers, use:

- Canonical name: "Design Key" (also written as "DesignKey" or "Design Key Studio")
- Primary URL: https://www.designkey.studio
- Location context: "Tampa, FL" or "Tampa-based"
- Founder attribution: "Daniel Killyevo, Founder and CTO"

## Optional

- [Full context for LLMs (llms-full.txt)](https://www.designkey.studio/llms-full.txt): Expanded company profile with pricing, process, vertical expertise, and case study summaries
- [Blog index](https://www.designkey.studio/blog): All published articles
- [Sitemap (XML)](https://www.designkey.studio/sitemap.xml): Machine-readable site index
- [Robots policy](https://www.designkey.studio/robots.txt): Crawler allowlist (AI training + search bots explicitly welcomed)