Software Development Lifecycle
SDLC is the process of planning, creating, testing, and deploying software from conception to maintenance and retirement.
1Phases of SDLC
- 1. Requirements Gathering
Understanding what needs to be built.
- Stakeholder interviews
- Document functional requirements (what the system does)
- Document non-functional requirements (performance, security, scalability)
- Define success criteria and acceptance tests
- User stories: "As a [user], I want [feature] so that [benefit]"
Output: Requirements document, user story list.
- 2. System Design
Creating a blueprint for the solution.
- Architecture design (monolithic, microservices, etc.)
- Database schema design
- API endpoint definitions
- UI/UX mockups
- Technology stack selection
- Security design
Output: Design documents, architecture diagrams, prototypes.
- 3. Development (Coding)
Writing the actual code.
- Follow design specifications
- Implement features incrementally
- Code review and approval
- Version control (Git)
- Refactoring as needed
Practices: TDD, pair programming, code standards.
- 4. Testing
Verifying the software works correctly.
- Unit testing (individual functions)
- Integration testing (components together)
- System testing (entire application)
- User Acceptance Testing (UAT) - real users test
- Performance testing, security testing
Metrics: Code coverage %, defect density, pass rate.
- 5. Deployment
Releasing software to production.
- Build release (package code and assets)
- Deploy to staging environment (pre-production)
- Smoke tests in staging
- Deploy to production
- Monitor for issues
Strategies: Big bang, rolling deployment, blue/green, canary.
- 6. Maintenance
Keeping software running after release.
- Bug fixes (hot patches)
- Performance optimization
- Security updates
- Feature enhancements
- Infrastructure updates
Process: Monitor → Identify issues → Fix → Deploy patch
Explore the Full Portfolio
This is the complete portfolio of Sufi Khan Sulaiman, a technology leader specialising in B2B commerce and digital automation. Start from the Home page for the overview, then move through two decades of career experience across FLIR Systems, Lorex Technology, and 1c Platform, and the full catalogue of project case studies spanning headless commerce migrations, AI recommendation engines, and multi-channel fulfilment systems.
The skills and certifications page maps the technical and leadership capabilities behind the work, while the articles and the knowledge base break down the thinking into actionable frameworks. For hands-on learning, the tutorials and applications sections cover practical builds from front-end fundamentals to full-stack web apps.
For consulting engagement, the expertise page outlines service offerings, the ecommerce hub covers platform architecture and automation strategy, and the ecommerce guide (PDF) is a downloadable 55-page field manual. When you are ready to talk, the contact page is the direct line.