We are growing. And we are looking for talented people. At Decskill, we believe that technological excellence is driven by human talent. We are an IT consulting company with more than 10 years of consolidated experience in the market, focused on building long-term relationships with both our clients and our people. Today, we are a community of over 800 professionals, working from Lisbon, Porto, and Madrid, contributing to impactful technology initiatives. As part of the Astek Group, we combine a strong local culture with a global presence, being active in around 23 countries across 4 continents. This allows us to offer an international context, diverse challenges, and long-term career opportunities, while staying close to our teams. IT Senior Mainframe Developer! Responsibilities Design, develop and maintain complex mainframe applications Develop and maintain JCL scripts to automate batch processing and data transfer Collaborate with database administrators to ensure efficient data access and manipulation Ensure adherence to industry best practices, security standards, and compliance requirements Troubleshoot and resolve complex technical issues. Requirements Mastery in: COBOL, JCL, IDMS, DB2 Very good organisational and communication skills (both written and spoken) in a multi‐cultural environment. Ability to manage/facilitate a meeting. Aim to deliver very high quality results, respecting the deadlines. Respect the procedures, methodologies and directives. Good listening, questioning ability and result‐driven personality. Good oral and written communication skills. Creativity & Innovation/ Problem solving. Ability to understand, explain and support change. Ability to collaborate/Teamwork. Benefits Long-term projects with national and international context. Opportunities to grow technically and professionally. A people‐first culture, focused on transparency and trust. Teams that value ownership, collaboration and stability. At Decskill, we are committed to equal opportunities and non‐discrimination. We promote a culture of diversity and inclusion, where recruitment and career progression are based solely on talent, regardless of age, gender, ethnicity, race, nationality, or any other form of discrimination incompatible with human dignity. #J-18808-Ljbffr