Happiest Minds is hiring for various developer, lead, and architect positions in Bangalore and Pune, requiring 2 to 13 years of experience with specific skills in technologies like Java, Spring, Magento, and Hadoop. Candidates should have hands-on experience on relevant frameworks, agile methodology exposure, and end-to-end project implementation. Additional requirements vary by role, including certifications and proficiency in tools such as Salesforce, JEE platforms, and web frameworks.