Senior Fullstack Developer (Python / FastAPI / Next.js)

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DO OK • Life-changing software servicesAI software

Workplace type: remote; Locations: Wrocław, Skarbowców 23B, Wrocław, Country code: PLFull-TimeSenior

Salary23,000 - 27,000 PLN per month

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Job Details

Languages: Pl C1, en C1
Experience: Python – 6+ years of experience; JavaScript / Next.js – 4+ years; LLMs / OpenAI – 2+ years; Data Science – 5+ years; MongoDB – 3+ years; Azure – 6+ years; IoT – 4+ years
Required Skills: PostgreSQLPythonJavascriptMongoDBNumpyAzureData scienceFastAPINext.js

Have 6+ years of Python experience.
Have experience building backend services and APIs with FastAPI.
Have 4+ years of JavaScript / Next.js experience in fullstack frontend development.
Have 2+ years of practical experience integrating LLMs / OpenAI models.
Have 5+ years of data science experience, including NumPy and analytical workflows.
Have 3+ years of MongoDB experience, including schema design and querying.
Have 6+ years of Azure cloud infrastructure experience.
LangChain experience building LLM-powered pipelines and agents is a plus.
Databricks / Spark experience with large-scale data processing is a plus.
Terraform, Kubernetes, and CI/CD experience are a plus.
PostgreSQL, NLP, Django / Flask, or C# / C++ experience is a plus.
Experience with Orleans / SignalR, ELK Stack, architectural fundamentals, cybersecurity, or IoT-related systems is a plus.

Design and develop fullstack applications using FastAPI and Next.js.
Build and maintain REST APIs with FastAPI.
Design and implement ETL pipelines for data processing.
Integrate LLMs (OpenAI) and build AI-powered features using LangChain.
Work with data science workflows, including NumPy, data modeling, and analytics.
Design database structures using MongoDB and PostgreSQL.
Deploy and maintain infrastructure on Azure.
Contribute to architectural and product decisions.

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