Fullstack Engineer - AI-Based Applications

InPost • Poland

Company

InPost

Location

Poland

Type

Full Time

Job Description

Company Description

InPost Group is an innovative European out of home deliveries company revolutionizing the way parcels are delivered to customers. With operations across several countries our network of intelligent lockers provides customers with a fast convenient and secure delivery option. InPost Group is a publicly traded company with a market capitalization of about $5 billion as of March 2023. With over 10000 employees worldwide InPost Group is one of the largest out of home delivery providers in Europe committed to providing sustainable and efficient delivery solutions to meet the evolving needs of customers in today's rapidly changing landscape.

Job Description

We are seeking a skilled and innovative AI Engineer with Full Stack Development expertise who has experience working with Generative AI (GenAI) models such as Large Language Models (LLMs) and implementing these solutions into web applications. This role combines the responsibilities of a full-stack developer with advanced knowledge of machine learning models APIs and cloud infrastructure focusing on integrating state-of-the-art AI capabilities into user-friendly and efficient web-based applications.

Key Responsibilities:

Model Integration & API Development:

  • Integrate LLMs and other GenAI models into web applications through efficient API design and implementation.

  • Build and optimize API endpoints to allow seamless real-time interaction between front-end applications and back-end AI models.

  • Design and develop secure scalable and high-performing microservices for AI model deployment.

Front-End Development:

  • Design and develop responsive and intuitive front-end applications using React.js to enhance the user experience of AI-powered applications.

  • Implement front-end components to visualize interpret and manage AI model outputs effectively.

Back-End Development & AI Pipelines:

  • Develop robust back-end systems in Python to support the deployment scalability and maintenance of GenAI models.

  • Build and maintain data pipelines including preprocessing data and post-processing AI model outputs for consumption by applications.

  • Implement best practices for handling sensitive data and maintaining model performance.

Infrastructure & Deployment:

  • Use Kubernetes and Docker for containerization and orchestration to ensure scalable deployment and management of AI applications.

  • Implement continuous integration and continuous deployment (CI/CD) pipelines for automated testing and deployment of code changes.

  • Maintain a scalable and secure cloud infrastructure leveraging platforms such as Google Cloud Platform or Azure for model training storage and deployment.

LLM and GenAI Ecosystem Expertise:

  • Utilize vector databases (e.g. Pinecone Weaviate or Faiss) to manage and retrieve embeddings for efficient similarity search and recommendation systems.

  • Work with frameworks for model development and deployment including Hugging Face Transformers LangChain and OpenAI.

  • Optimize and fine-tune LLMs to improve performance based on application needs.

Qualifications

  • Min Bachelor's degree in Computer Science Engineering or a related field.

  • 3+ years of experience as a full-stack developer ideally with a focus on AI model integration.

  • Proficiency in Python for backend development and React.js for frontend development.

  • Strong knowledge of GenAI models and LLMs including experience with model selection tuning and embedding strategies.

  • Experience with API development and integration to facilitate communication between front-end applications and AI models.

  • Working knowledge of containerization technologies like Docker and container orchestration with Kubernetes. Familiarity with cloud platforms (AWS GCP or Azure) for AI model deployment and scalability.

  • Proficient in vector databases and their integration with LLM models for enhanced application functionality.

  • Familiarity with database management (SQL NoSQL) and caching solutions (e.g. Redis).

  • Experience in CI/CD pipelines code versioning (Git) and DevOps practices.

  • Excellent knowledge of English AND Polish.

Preferred Qualifications:

  • Knowledge of streaming architectures for real-time data processing and ingestion (e.g. Apache Kafka).

  • Familiarity with serverless architectures (e.g. AWS Lambda) for scalable deployment of AI features.

  • Prior experience in ML frameworks like TensorFlow PyTorch or ONNX.

  • Understanding of data privacy and security best practices in AI applications.

Soft Skills:

  • Strong problem-solving skills and ability to work independently and as part of a team.

  • Excellent communication skills to translate technical requirements into actionable development tasks.

  • Proactive approach to staying updated with emerging AI technologies and frameworks.

Additional Information

​​​​​​ Why Join InPost?

  • This is a unique opportunity to work on cutting-edge AI applications that leverage the latest advancements in Generative AI and Large Language Models impacting the future of intelligent software development.

  • The option to work from the office or 100% remotely

  • Opportunity to work in a diverse international and cross-functional environment along with leading experts.

  • Fulfilling careers with a range of benefits for employees and invests in providing training opportunities for their development.

  • Involvement in technology monitoring and choices

  • Your impact will be visible instantly and you will be making a difference in our users lives

Apply Now

Date Posted

11/23/2025

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