micro frontends, PayFit, software development, CI/CD, React, deployment speed, engineering productivity, codebase management, development teams ## Introduction In the ever-evolving landscape of software development, organizations continually seek out strategies to streamline their processes and enhance productivity. The rise of micro frontends was once hailed as a revolutionary approach, promoting modularization and independent deployment of frontend applications. However, as the case of PayFit illustrates, this approach may not always yield the anticipated benefits. Through a substantial migration effort over a two-year period, PayFit eliminated its micro frontends, resulting in remarkable improvements in continuous integration (CI) times, deployment speeds, and overall engineering velocity. This article delves into their journey, the challenges faced, and the substantial gains achieved. ## Understanding Micro Frontends Micro frontends are an architectural style that involves decomposing a frontend application into smaller, manageable pieces, or "micro-apps," allowing for independent development and deployment by different teams. This approach can offer several advantages, including improved scalability, the ability to use different technologies, and enhanced team autonomy. However, as many companies have discovered, the complexity introduced by micro frontends can lead to significant overhead. ### The Initial Challenges For PayFit, a company that has grown to support a codebase used by approximately 100 developers across 22 teams, the initial adoption of micro frontends was driven by the need for flexibility and rapid deployment. However, as the company scaled, it became increasingly clear that the anticipated benefits were accompanied by considerable challenges. The development teams faced heightened complexity in managing dependencies, increased coordination efforts, and lengthy CI processes. PayFit's CI pipeline initially required 45 minutes to run, significantly hampering the development speed. The deployment process, which could take anywhere from 2 to 5 days, became a bottleneck, affecting the overall responsiveness of the teams to business needs. ## The Decision to Migrate Away from Micro Frontends After extensive analysis and discussions, PayFit made the strategic decision to phase out its micro frontends architecture. The goal was to streamline development processes by consolidating the codebase, thereby reducing complexity and fostering greater collaboration among teams. This migration was not a small feat; it required dedicated resources, including 2.5 engineers working over two years. ### Phased Migration Approach The migration process was carefully planned and executed in phases to minimize disruption. PayFit's engineering leadership emphasized the importance of clear communication and meticulous documentation throughout the transition. This approach ensured that all stakeholders were aligned and that team members understood the rationale behind the shift. During this period, the team also invested in refining their CI/CD processes. By consolidating their codebase, they were able to simplify the CI pipeline, ultimately reducing the time it took to run tests and integrate code changes. The result was a staggering reduction in CI time from 45 minutes to just 7 minutes. ## The Results: A Transformation in Velocity The outcomes of PayFit’s migration were remarkable. The deployment times, which once stretched into days, were slashed to mere 20 minutes. This newfound agility meant that teams could deploy new features and fixes much more rapidly, greatly enhancing their responsiveness to customer feedback and market demands. Moreover, the overall engineering velocity saw a staggering increase—17 times higher than before the migration. This was not merely a function of reducing deployment times; it also reflected a deeper cultural shift within the organization. Teams were able to iterate faster, innovate more freely, and focus on delivering high-quality software without the overhead of managing multiple micro frontends. ### Enhancing Collaboration and Team Dynamics The migration away from micro frontends also had significant implications for team dynamics. With a unified codebase, developers were able to collaborate more effectively. The need for inter-team coordination diminished, which fostered a culture of ownership and accountability. Developers could now work within a single codebase, benefiting from shared knowledge and resources. ## Conclusion PayFit's decision to eliminate micro frontends serves as a compelling case study for organizations grappling with similar challenges. While micro frontends can offer benefits in certain contexts, they can also introduce complexities that hinder productivity and innovation. By streamlining their architecture and embracing a more unified approach, PayFit has not only enhanced their engineering effectiveness but has also set a precedent for other teams considering a similar path. As the software development landscape continues to evolve, the lessons learned from PayFit's experience underscore the importance of continuously evaluating architectural choices and being willing to pivot when necessary. In an era where speed and efficiency are paramount, having the flexibility to adapt can make all the difference. Source: https://blog.octo.com/react-paris-2026-cr-killing-micro-frontends