You will get a production-ready Next.js SaaS feature with API and deployment
Project details
I will design and ship one production-ready SaaS workflow across frontend, backend, data, and deployment.
This is a good fit for authentication, payments, dashboards, administrator tools, CRM workflows, AI API integration, notifications, reporting, or an existing feature that currently stops before production.
You work directly with a senior product engineer who can review the user flow, identify technical risk, implement the feature, run manual QA, and prepare a clear handoff.
This is a good fit for authentication, payments, dashboards, administrator tools, CRM workflows, AI API integration, notifications, reporting, or an existing feature that currently stops before production.
You work directly with a senior product engineer who can review the user flow, identify technical risk, implement the feature, run manual QA, and prepare a clear handoff.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$450
|
Standard
$1,500
|
Advanced
$3,500
|
|---|---|---|---|
| Delivery Time | 3 days | 10 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 5 | 10 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Frequently asked questions
About Kirina
Senior Full-Stack Product Engineer | Next.js, React Native & Web3
Seoul, South Korea - 3:21 am local time
My background combines senior frontend engineering with full product delivery. At Composable Finance, I helped build and maintain multichain products spanning Cosmos, Polkadot, Solana, and Ethereum, including bridge interfaces supporting 21 networks and more than 30 assets. At Netmarble's Metaverse World, I developed DEX, staking, NFT payment, analytics, and admin experiences across desktop, mobile, and embedded webviews.
Through Done IT, I take products from an unclear idea to a working launch. I can handle product requirements, user flows, Figma UI/UX, frontend, backend, mobile packaging, cloud deployment, QA, and operational tools under one consistent product direction.
Relevant delivery experience includes:
• React and Next.js SaaS products, dashboards, marketplaces, CRM, and admin systems
• NestJS, Express, GraphQL, Prisma, Firebase, Supabase, Redis, and external APIs
• React Native and Expo apps for iOS and Android
• Payments, subscriptions, coupons, refunds, OAuth, notifications, and automation
• AI-assisted product features, including a two-week AI MVP launch
• Web3 wallets, DEX, swaps, liquidity pools, staking, NFT payments, IBC, and multichain bridges
• AWS EC2 and S3, CloudFront, Cloudflare R2, GCP, and Azure environments
I have launched 17 products across AI, SaaS, web, mobile, and blockchain. I communicate directly, document important decisions, run at least two rounds of manual QA, and stay responsible through deployment and handoff.
If your scope is still evolving, I can begin with a paid architecture and product-scope milestone. If the product is already in development, I can review the current codebase, isolate the highest-risk area, and ship one end-to-end improvement first.
Tell me what must work in production, what is already built, and where the project is currently blocked.
Steps for completing your project
After purchasing the project, send requirements so Kirina can start the project.
Delivery time starts when Kirina receives requirements from you.
Kirina works on your project following the steps below.
Revisions may occur after the delivery date.
Scope and access review
Confirm the production outcome, inspect available code and documentation, and identify the highest-risk dependency.
Technical plan and UX alignment
Define the data flow, API boundary, acceptance criteria, and any UI decisions needed before implementation.