As a Senior Backend TypeScript Developer at Deltologic, you will design and develop innovative products and features for a variety of exciting international projects. Our clients range from leading companies in the USA, Germany, Korea, Mexico, and France. We are seeking skilled developers who are passionate about crafting clean, efficient solutions and continuously refining their expertise.While our primary focus is on backend development, we are looking for someone who also has frontend skills to create simple UI elements when needed. However, backend expertise remains our top priority, as this is where we do most of our work.This is an opportunity to contribute to impactful projects, grow your skills, and take ownership of new initiatives in a collaborative and supportive environment.Payment Details:● Hourly Rate: 80 PLN - 150 PLN● Estimated Monthly: 13 440 PLN - 25 200 PLN● Optional: Paid overtime available● The job offer involves approximately 130–160 working hours per monthOur Stack:● Backend: Node.js or NextJS with TypeScript● Frontend: React or NextJS● Occasionally Python● Deployment: AWS (Lambda or ECS) with CDK● CI/CD: GitHub ActionsYour responsibilities:● Develop new systems and automations.● Design and implement new solutions and features.● Maintain and improve existing deployments.● Share knowledge and mentor team members.Our requirements:● At least 5 years of commercial experience in software development.● Degree in Informatics, Computer Science, Data Science, or a related field.● Experience with: Node.js, TypeScript, React, Tailwind CSS, REST, Git, SQL, and NoSQL databases.● Fluency in English.Optional:● Proficiency in AWS technologies (Lambda, DynamoDB, S3, CDK).● Experience creating REST APIs.● Background in BI, data engineering, or e-commerce projects.● Fluency in German or Spanish.Recruitment stages: Intro call Technical + English screening test Technical interview with live coding exercises Final fit interview