Fullstack IoT Engineer (B2B)

Responsibilities

We are looking for a hands-on software and cloud engineer with a strong backend focus who wants to grow within IoT and cloud-native systems.
You will contribute to building scalable IoT and cloud platforms at OBI Smart Technologies Poland, working on systems handling device communication, telemetry ingestion, and automation workflows. You collaborate closely with backend engineers, architects and product teams to deliver reliable and production-ready solutions across AWS-based environments.

Your key responsibilities include:
• Develop and maintain backend services using TypeScript, Node.js, NestJS and Fastify.
• Design and implement REST APIs using OpenAPI standards and validation patterns.
• Contribute to AWS-based IoT and event-processing architectures including IoT Core, MQTT and telemetry ingestion.
• Support development of data processing and automation workflows using Lambda, SQS, Kinesis and Timestream.
• Work with PostgreSQL or Aurora databases and maintain persistence layers using TypeORM.
• Contribute to infrastructure and deployment processes using Terraform or OpenTofu, Docker and CI/CD pipelines.
• Support monitoring, testing, observability and operational stability while occasionally contributing to frontend components in Vue 3.
Qualifications

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Completed university degree in Computer Science or a comparable technical field.
• 3+ years of experience in backend development using TypeScript and Node.js.
• Good knowledge of REST API design and frameworks such as NestJS.
• Hands-on experience with AWS services such as Lambda, S3, SQS or IoT Core.
• Experience working with relational databases such as PostgreSQL and ORM tools.
• Basic experience with containerization, CI/CD pipelines and infrastructure as code tools.
• Understanding of cloud-native or event-driven architectures

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Fluent communication skills in English and Polish and availability to work in a hybrid mode with 1–2 office visits per week.

About OBI Smart Technologies

WHO ARE WE:
We are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail.
OUR MISSION:
"We unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe’s largest DIY retailers. Leveraging proven best practices, we advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer."