Development Plan

34-week (8 months) development roadmap for the GSign platform.

Timeline Overview

Phase	Weeks	Focus
1-2	1-6	Foundation (Auth, DB, Basic API)
3-5	7-14	Core Features (Documents, Signing)
6-8	15-18	MVP Ready
9-11	19-26	API Platform, Compliance
12-14	27-34	Production Launch

Phase Details

Phase 1: Foundation (Weeks 1-2)

Backend Setup:

• [ ] Go project initialization (Fiber v2)
• [ ] PostgreSQL setup (pgx driver)
• [ ] MongoDB setup (mongo-go-driver)
• [ ] Redis setup
• [ ] Configuration management
• [ ] Logging setup (zerolog)
• [ ] Error handling patterns

Frontend Setup:

• [ ] Next.js 14 project (App Router)
• [ ] TypeScript configuration
• [ ] Tailwind CSS + Shadcn/ui
• [ ] ESLint + Prettier
• [ ] State management (Zustand)

Phase 2: Authentication (Weeks 3-4)

Backend:

• [ ] JWT implementation (golang-jwt)
• [ ] User model (PostgreSQL)
• [ ] Registration endpoint
• [ ] Login endpoint
• [ ] Password hashing (bcrypt)
• [ ] Refresh token logic

Frontend:

• [ ] Login page
• [ ] Registration page
• [ ] Auth context/store
• [ ] Protected routes
• [ ] Token management

Phase 3: Document Management (Weeks 5-8)

Backend:

• [ ] Document upload API
• [ ] S3 integration
• [ ] PDF processing
• [ ] Document versioning
• [ ] Metadata storage

Frontend:

• [ ] Document upload component
• [ ] Document list page
• [ ] PDF viewer (React PDF)
• [ ] Document details page

Phase 4: HSM Backend Service (Weeks 9-11)

HSM Service:

• [ ] Separate Go backend
• [ ] Certificate generation API
• [ ] Document signing API
• [ ] Certificate validation
• [ ] Internal API authentication

Integration:

• [ ] HSM API client in GSign backend
• [ ] Certificate management UI
• [ ] Signing workflow integration

Phase 5: Signature Workflow (Weeks 12-14)

Backend:

• [ ] Envelope model
• [ ] Recipient model
• [ ] Signature field model
• [ ] Signing workflow engine
• [ ] Email notifications

Frontend:

• [ ] Envelope creation wizard
• [ ] Field placement editor
• [ ] Signature capture component
• [ ] Signing experience

Phase 6: Templates (Weeks 15-16)

• [ ] Template model
• [ ] Template CRUD API
• [ ] Template instantiation
• [ ] Template UI

Phase 7: API Platform (Weeks 17-20)

• [ ] API key management
• [ ] Rate limiting
• [ ] Webhook system
• [ ] API documentation (Swagger)
• [ ] SDK generation

Phase 8: Billing (Weeks 21-23)

• [ ] Stripe integration
• [ ] Subscription management
• [ ] Usage tracking
• [ ] Invoice generation

Phase 9: Compliance (Weeks 24-26)

• [ ] Audit trail system
• [ ] Certificate of completion
• [ ] GDPR compliance
• [ ] Data export/deletion

Phase 10: SSO & Advanced Auth (Weeks 27-28)

• [ ] SAML 2.0 integration
• [ ] OAuth 2.0 providers
• [ ] Organization management

Phase 11: Performance & Security (Weeks 29-30)

• [ ] Load testing
• [ ] Security audit
• [ ] Performance optimization
• [ ] CDN setup

Phase 12: Mobile & PWA (Weeks 31-32)

• [ ] Responsive design polish
• [ ] PWA configuration
• [ ] Mobile signing experience

Phase 13: Beta Testing (Week 33)

• [ ] Beta user onboarding
• [ ] Feedback collection
• [ ] Bug fixes

Phase 14: Production Launch (Week 34)

• [ ] Production deployment
• [ ] Monitoring setup
• [ ] Documentation finalization
• [ ] Launch!

Priorities

MVP (Must-have)

• Authentication
• Document upload/view
• Basic signing workflow
• API endpoints
• Audit trail

v1.0 (Should-have)

• Templates
• PKI signatures
• Webhooks
• SSO
• Billing

v1.5+ (Nice-to-have)

• Bulk send
• PWA
• AI features
• Integrations

Success Metrics

Metric	Target
API Response Time	< 200ms (p95)
Uptime	99.9%
Test Coverage	> 80%
Concurrent Users	10,000
Envelopes/Day	100,000