Senior Node.js Engineer (AWS Serverless)

Altamira is a software development outsourcing company. We provide solutions that make a tangible impact on our clients’ growth and productivity. With domain knowledge across product and technology development, we aim to provide cost-efficient solutions without compromising quality. We are driven to deliver the best, every single time. Altamira service delivery teams currently span Slovakia, Ukraine, and the Middle East, and we have ambitions to expand our footprint to meet the growing demand across Europe and into our primary growth markets in the UK and the US. In terms of industry verticals, we are focused on EdTech, Fintech, eCommerce, and Pharma. As a fully remote company, we welcome talented individuals seeking hourly-based freelance opportunities We are currently seeking a skilled Senior Node.js Engineer (AWS Serverless) on behalf of our client - a specialized German consulting firm focused on the energy and financial markets. Our client provides high-end advisory and technology services, helping their partners navigate the complexities of energy trading, risk management, and digital transformation. Their work combines deep industry-specific expertise with a commitment to high-quality software engineering. By joining this project, you will be part of a team that values architectural excellence and high-end technical solutions. We are building a large-scale cloud-based portal in the energy domain, focused on digitalizing end-to-end processes for renewable energy management. Project Goal Rewrite legacy project: You will be responsible for modernizing and rebuilding an existing legacy system using a modern tech stack. Requirements Core Technical Expertise: Strong experience with Node.js and TypeScript . Several years of hands-on experience with AWS . Critical: Extensive experience with AWS Serverless and serverless architecture. Proficiency in core AWS services: Lambda, DynamoDB, SQS, S3, Cognito, and CloudWatch . Architecture & Infrastructure: Strong experience in designing REST APIs . Solid understanding and experience with event-driven architectures . Experience implementing Infrastructure as Code (IaC) using CloudFormation or the Serverless Framework . Knowledge of OpenSearch is considered an advantage. DevOps & Engineering Practices: Experience with CI/CD pipelines ( Azure DevOps is a major plus). Proven ability in monitoring and troubleshooting production systems. Expert knowledge of Git and professional code review practices. Domain & Nice-to-Have: Previous experience in the Energy, Utilities, or Trading domains is highly valued. Responsibilities Backend Development: Develop and maintain high-performance backend services using the AWS Serverless stack. API Design: Architect and implement scalable REST APIs to support growing business needs. Infrastructure: Design and deploy robust Infrastructure as Code solutions. Automation: Work closely with CI/CD pipelines and drive deployment automation. System Support: Actively monitor, troubleshoot, and support production systems to ensure maximum uptime. Cross-functional Collaboration: Collaborate effectively with frontend and DevOps teams to deliver end-to-end solutions. Our transparent recruitment journey usually takes up to 2 weeks and includes a few stages: Recruiting Interview -> 30-45 min Technical Interview -> 1-1,5h Client Interview (optional) -> up to 1h Reference Check Offer If you're seeking a flexible, welcoming, and professional environment, join our freelance project-based team! We do believe that the success of altamira.ai is impossible without the success of our Talents and the success of our Clients!