I've managed many projects which included multiple teams interacting through a shared API. For instance, in modern web applications it is common to have one team working on the front-end and one team working on the server back-end through common network interface.
One project I managed was a resource fulfillment and allocation feature. Basically the user could purchase a resource and allocate it with one step. One team was working on the purchase flow and another was working on the physical allocation. The integration happened through a REST API.
While it would be tempting to develop both sides of the API to completion, and spend the end of the project integrating the front and back-end in my experience this risky as mis-interpretations of subtle dynamics of the API can cause the integration to fail or delay the release. It also delays true end-to-end testing development to the end of the project rather than shifting end-to-end testing to beginning of the project.
In the project above we "drove the spike" by ensuring by pressing a button (even though we didn't have the final designs for the button) the user could purchase and allocate storage, while ignoring error paths such as financial transactional and resource allocation failures. Also features such as resource reclaiming were not implemented until later in the project.
This allowed both teams to collaborate earlier in the development process, and baseline end-to-end tests to be established.
Understanding the Spike
The term "driving the spike" in software development refers to tackling the most complex or uncertain aspects of a project upfront. In the context of integrating software projects with multiple teams, it involves focusing on building and validating the shared API early in the development cycle. This spike serves as the backbone that connects various components, systems, and teams, ensuring a solid foundation for further development.
Benefits of Driving the Spike
- Early Validation
By implementing and testing the shared API early, teams can identify integration challenges and potential conflicts at an early stage. This reduces the likelihood of discovering major issues late in the development process, which can be time-consuming and costly to resolve.
- Risk Mitigation
Addressing complex integration issues early minimizes project risks. It allows teams to evaluate potential roadblocks, performance bottlenecks, and architectural mismatches, enabling them to make informed decisions and adjustments before they escalate.
- Cross-Team Collaboration
Driving the spike promotes collaboration between teams from the start. When teams work together on building the shared API, they gain a deeper understanding of each other's requirements, constraints, and coding practices. This shared experience fosters a sense of unity and shared responsibility.
- Clear Expectations
Early integration provides a tangible reference point for all teams to align their work. This shared vision helps prevent misunderstandings and discrepancies in the understanding of how different components should interact.
Steps to Drive the Spike
- API Design Begin by collaboratively designing the API that will serve as the integration point. Ensure that all teams' requirements are considered and that the API is flexible enough to accommodate changes as the project progresses.
- Prototyping Develop a prototype of the API along with basic functionality. This will help to validate the integration concept and iron out potential issues early.
- End-to-End Testing Create a simple end-to-end scenario that involves multiple components from different teams using the API. This allows everyone to witness the integration firsthand and identify any immediate problems.
- Feedback Loop Encourage open communication among teams to gather feedback on the integration experience. Iterate on the API design and implementation based on the feedback received.
- Documentation Document the API comprehensively, including usage guidelines, examples, and best practices. This documentation will serve as a valuable resource for all teams during development.
- Continuous Integration Implement a continuous integration process to ensure that changes made by different teams don't break the API integration. Automated tests can catch regressions early.
Integrating software projects with multiple teams using a shared API through the "driving the spike" approach is a proactive strategy that yields multiple benefits. It encourages early collaboration, minimizes risks, and sets clear expectations for the development process. By focusing on the most critical integration challenges upfront, teams pave the way for a smoother development journey and a successful project outcome.