QuickBilling
From Marketing Website to Full Invoicing Product
Designed and delivered the marketing site at quickbilling.io and the production invoicing product at app.quickbilling.io — a frictionless B2B SaaS for freelancers.
QuickBilling targets freelancers and solo businesses in the US, Europe, and worldwide. QuickBilling needed both a marketing presence and a production-ready invoicing product. The goal: create, send, and track invoices in seconds — no client portal required. SolutionPlus delivered the marketing site at quickbilling.io and the full product at app.quickbilling.io.
The Challenge
Freelancers face common billing friction: invoices lost in email threads, no visibility into whether clients opened them, spreadsheets for customer management, and clients needing accounts just to pay. QuickBilling needed to solve all of this while staying simple.
- •Invoices lost in email threads
- •No idea if clients even opened an invoice
- •Spreadsheets for customer management
- •Clients need accounts just to pay
- •Overpaying for features not needed
Our Approach
SolutionPlus designed and built both the marketing website and the product in parallel. We started with a clear value proposition: frictionless invoicing built for speed, not complexity. The marketing site at quickbilling.io communicates features and pricing; the product at app.quickbilling.io delivers them.
"Focus on your work, not chasing payments."
What We Built
Discovery & Requirements Gathering
Before writing any code, we mapped user needs, defined scope, and aligned technical requirements with business goals.
Marketing Site (quickbilling.io)
A conversion-focused marketing website showcasing features, pricing, and benefits.
Product (app.quickbilling.io)
A full invoicing platform with professional templates, analytics, multi-workspace, and developer API.
Development Process & Delivery
We followed a structured delivery model with clear milestones, regular demos, and iterative feedback.
Sprint-based delivery
2-week sprints with demos and scope adjustments based on stakeholder feedback.
Parallel tracks
Marketing site and product developed in sync, sharing design system and copy.
API-first approach
REST API and webhooks designed early so integrations could start before UI polish.
Security by default
AES-256, TLS 1.3, and SOC2 Type II considerations from day one.
Architecture & Tech Stack
The stack was chosen for speed, maintainability, and developer experience — not trend or familiarity.
Engagement at a Glance
Marketing site to product
6 months
Pricing tiers
Free, Premium, Unlimited
Languages supported
4 (EN, DE, FR, ES)
Webhook events
30+
Security
AES-256, SOC2 Type II
Why This Engagement Worked
We built for the target user from day one: freelancers who want to spend less time invoicing and more time working. No accounting jargon, no unnecessary complexity.
Product-First Design
Every feature was designed around real freelancer workflows — create, send, track, get paid.
Marketing and Product in Sync
The marketing site and product shared the same value proposition, ensuring consistent messaging.
Developer Experience
REST API, webhooks, sandbox, and idempotency built in for programmatic invoicing.
Security by Default
Enterprise-grade encryption and compliance from the start, not as an afterthought.
What Made This Different
Jumped straight to design without validating freelancer pain points
User interviews and workflow mapping before any wireframes
Built marketing site and product in isolation with different messaging
Parallel development with shared value proposition and design system
API added as an afterthought
REST API, webhooks, and sandbox designed from the start
Fixed scope with no room for feedback
Sprint-based delivery with regular demos and scope adjustments
React · TypeScript · Next.js · REST API · AWS
"A freelancer invoicing tool should be frictionless — create, send, get paid."
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