Senior Ruby on Rails with Sinatra developer- Tietoevry Create ( m/f/d)

Role Overview: We are seeking a high-caliber and experienced Senior Ruby on Rails Developer to join our team. The candidate will focus primarily on identifying and resolving critical application stability and scalability challenges. This role requires deep expertise in Ruby on Rails with a strong understanding of microservices architecture, distributed systems, and cloud infrastructure. Key Responsibilities: Analyze and identify bottlenecks related to application instability and scalability issues. Provide technical solutions and strategies to address bot attacks, application failures, and monitoring gaps. Collaborate with cross-functional teams to optimize critical workflows impacting system performance. Lead efforts in improving infrastructure monitoring and alerting — working closely with tools like Datadog. Develop and maintain robust Ruby on Rails microservices and APIs to enhance platform stability. Implement fault tolerance mechanisms, including auto-restart scripts and failover processes. Ensure code quality through code reviews, testing, and best practices. Mentor junior developers and share knowledge within the team. Assist in new feature development alongside production issue resolution. Required Skills and Experience: 10 to 15 years of professional experience in Ruby on Rails development. Strong knowledge of Ruby on Rails and experience with Sinatra. Proven experience working with microservices-based architectures. Familiarity with Kafka, ZooKeeper, and Thrift or similar messaging/streaming platforms. Hands-on experience with SOLR for search and AWS services (especially AWS SQS, hosting, and cloud infrastructure). Experience with security practices including bot mitigation (e.g., Cloudflare or similar). Proficiency in infrastructure monitoring tools, preferably Datadog. Strong debugging, performance tuning, and troubleshooting skills. Experience working in agile development environments. Excellent communication and collaboration skills. Prior experience in healthcare technology platforms is a plus. At Tietoevry , we believe in the power of diversity, equity, and inclusion. We encourage applicants of all backgrounds, genders (m/f/d), and walks of life to join our team, as we believe that this fosters an inspiring workplace and fuels innovation. Our commitment to openness, trust, and diversity is at the heart of our mission to create digital futures that benefit businesses, societies, and humanity. Diversity, equity and inclusion (tietoevry.com) We are developers of digital futures! Tietoevry is a leading software and digital engineering services company with global market reach and capabilities. We provide customers across different industries with mission-critical solutions through our specialized software businesses* Tietoevry Care, Tietoevry Banking and Tietoevry Industry, as well as our digital engineering business Tietoevry Create. Our 16 000* talented vertical software, design, cloud and AI experts are dedicated to empowering our customers to succeed and innovate with the latest technology. Tietoevry ’s annual revenue for the continuing businesses* is approximately EUR 2 billion. The company’s shares are listed on the NASDAQ exchange in Helsinki and Stockholm, as well as on Oslo Børs. (www.tietoevry.com). Originally posted on Himalayas