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Senior Full-Stack Engineer
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About On The Spot
About the team
At this stage, details about the team and project are under NDA and cannot be shared publicly. We’ll be happy to tell you more during the interview process.
About the role
We are seeking a skilled Senior Full-Stack Engineer to join our team in building an innovative application leveraging cutting-edge technologies. The ideal candidate will have expertise in developing and maintaining robust, scalable systems with a focus on data processing and AI integration.
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Responsibilities
- Design, develop, and maintain server-side logic using TypeScript and Express.js on AWS infrastructure
- Integrate and optimize Large Language Models (LLMs) for advanced data processing and user interaction features
- Implement and enhance data cleaning pipelines to ensure high-quality, reliable datasets
- Collaborate with cross-functional teams to deliver scalable and efficient solutions
- Deploy and manage application components on AWS services (e.g., Lambda, ECS, S3)
- Write clean, maintainable, and well-documented code following best practices
Requirements
- 5+ years of hands-on Full-Stack development experience
- Proficiency in TypeScript and Node.js with experience building RESTful APIs using Express.js
- Hands-on experience with AWS services (e.g., Lambda, S3, ECS, RDS)
- Familiarity with Large Language Models (LLMs) and their integration into applications
- Strong knowledge of data cleaning techniques and tools for handling structured and unstructured data
- Experience with version control (Git) and CI/CD pipelines
- Excellent problem-solving skills and ability to work in a fast-paced environment
Nice to have
- Experience with React Native for cross-platform mobile development
- Knowledge of additional AWS services like Step Functions or Athena
- Familiarity with data visualization or ETL processes
- Experience with cryptocurrency technologies, including Ethereum, Solana, and the Viem library for blockchain interactions
Benefits
- Work in a highly professional team. Informal and friendly atmosphere in the team
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable office in Warsaw at Prosta 51
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- Flexible working hours — we care about you (!) and your output
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
If you'd like to work from Poland, having Polish citizenship, karta pobytu, or D-type work visa for Poland is obligatory to be considered for this position. Thank you!
Contribute to our growth
Know someone perfect for this role? Let us know about them. We have a referral program to recognize your support.
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