Background With adolescent depression and suicidality increasing, technology-based interventions may help address mental health needs. The Enhancing Treatment and Utilization for Depression and Emergent Suicidality (ETUDES) Center supports development of technology interventions to help primary care providers target these problems. To successfully develop and integrate such interventions into primary care, iterative engagement of stakeholders is necessary. This paper outlines our stakeholder engagement process, a qualitative analysis of feedback and outcomes, and how feedback was incorporated to develop Center interventions. Methods Stakeholder panels represented key end-users of ETUDES Center interventions (adolescents, young adults, parents, and healthcare providers) and their advocates at the organizational/policy level. Meetings were held throughout intervention development and at annual retreats. Detailed meeting notes were collected and summarized by the stakeholder engagement team in real time, after which action items were generated and reviewed by the full research team. Using a content analysis approach, all stakeholder feedback summaries were coded using a prespecified codebook organized by recurring topics. Codes were organized under the Consolidated Framework for Implementation Research (CFIR). Anonymous stakeholder feedback surveys assessed relevance of topics, meeting effectiveness, and stakeholder involvement. Results Stakeholder meetings provided feedback on topics such as representation, language, access to care, and stigma. Relevant feedback and recommendations were incorporated into subsequent iterations of the interventions and their implementation. Mean stakeholder ratings of meeting proceedings on a 0–3 Likert scale ranged from 1.70 ( SD = 0.10) for participation to 2.43 ( SD = 0.08) for effectiveness in addressing meeting agenda. Conclusions The iterative engagement approach yielded practical feedback from stakeholders about ETUDES Center interventions. The team organized feedback to identify barriers and facilitators to using Center interventions and to generate action items, which were transposed onto components of an implementation strategy, supplemented by the CFIR-ERIC Implementation Strategy Matching Tool. Stakeholder feedback will direct the future development of an integrated intervention and guide further stakeholder engagement in developing technologies for adolescent mental health. Plain Language Summary: Depression and suicide in teens have been on the rise for the past several years. Primary care may be an ideal place to address these concerns because most teens have a primary care provider (PCP) who can offer a confidential place for both teens and their caregivers. Our Center develops technology-based interventions to help PCPs address teen depression and suicidality. Multiple barriers may hinder PCPs in addressing teen depression and suicidality. This paper describes how we engaged multiple types of stakeholders—or individuals with an interest in adolescent mental health—to ask for their feedback over a series of meetings, to help us improve the fit of our interventions to this population. Stakeholders included providers, community members like parents and mental health advocates, youth, and policymakers. We learned what was most important to them—including concerns about equitable access (e.g., providing broadband internet to families who do not have it so they can still participate) and legal risks or failures for the technology to identify suicidality. In this paper, we describe our process for not only recruiting and engaging stakeholders but also for planning action based on their feedback. Similar processes could be used by other researchers and clinical organizations seeking to incorporate technology into mental health interventions.