Cristofthe J. Fernandes is a psychologist and postdoctoral researcher at the Business Research Unit (BRU-Iscte) in Lisbon, Portugal. He completed his PhD in Psychology at the University of Porto, where he conducted a 12-month longitudinal study on autonomy as a predictor of subjective well-being during the COVID-19 pandemic. He has advanced expertise in quantitative methods, including structural equation modeling, longitudinal data analysis, mediation and moderation models, latent profile analysis, and instrument adaptation and validation. During his doctoral training, he completed a visiting research stay at Université Paris Nanterre (Paris X), contributing to the validation of the Comprehensive Relative Autonomy Index (CRAI) under the supervision of Prof. Evgeny Osin. His current research focuses on exploitative working relationships and their impact on employee health and behavioral outcomes (EWRI2022 project). He previously worked on the FCT-funded Time-to-Engage project, examining digital health technology use among older adults. His contributions include the development of psychometric instruments, coordination of participatory workshops, advanced statistical modeling, and dissemination of scientific findings. His broader research interests include well-being, autonomy, mental health, social inequalities, occupational health, digital health behaviors, and public mental health policy. He has authored peer-reviewed publications in international journals and contributed to research on the Brazilian Psychiatric Reform and on mental health disparities during the pandemic. He has experience in academic supervision, peer review, open science practices, and international research collaboration.