Why not use a functional resume?
A functional resume removes the timeline of your work history, which makes it harder for recruiters to judge how you applied your integration skills in real work settings and whether that experience is recent and relevant.
Career changers with transferable technical skills: This format can help if you have worked in related roles such as backend development, database administration, or systems engineering and have completed integration-focused projects or certifications, but have not held a formal integration developer job title.
Candidates with significant resume gaps: It may also be useful if you are returning to the workforce after a long break but have kept your skills current through freelance integration work, open-source contributions, or platform-specific certifications such as MuleSoft Certified Developer.
Even in these situations, a functional resume can raise red flags because hiring managers usually want to see where and when you used specific skills. Always connect your skills to concrete projects, tools, and outcomes instead of listing them in isolation.
A functional format is acceptable only when you have no direct integration developer experience and need to highlight transferable technical skills. Even then, tie every skill to a project or measurable result, and switch to a hybrid or reverse-chronological resume as soon as you gain relevant role experience.