Senior Fullstack IoT Engineer
Offer summary

(Summary generated by AI based on the full job description)

The project focuses on cloud-native IoT and distributed systems for telemetry processing and automation using AWS. Core technologies include TypeScript, Node.js, NestJS, Fastify, AWS IoT Core, Lambda, Kinesis, PostgreSQL, Kubernetes, Terraform and CI/CD pipelines. Responsibilities cover designing scalable backend services, REST APIs with OpenAPI standards, infrastructure management, GDPR-compliant solutions, and mentoring. The offer includes a 550 PLN monthly training budget and private medical care.

you can start ASAP

Senior Fullstack IoT Engineer

Company: Reply Polska Sp. z o.o.

from: 7 July 2026
to: 6 August 2026
135 - 165net (+ VAT)/ hr.B2B contract (full-time)
13 000 - 22 000gross/ mth.contract of employment
Offer parameters
level:senior
working mode:hybrid
Katowice, Silesian
Katowice, SilesianWrocławska 54View on map

Requirements

Operating system

Windows

Our requirements

  • Completed university degree in Computer Science or a comparable technical field.
  • 5+ years of professional experience in backend engineering with strong expertise in TypeScript and Node.js.
  • Strong hands-on experience with NestJS and designing scalable REST APIs in production environments.
  • Deep experience with AWS cloud services including IoT Core, Lambda, Kinesis, SQS, Timestream, IAM and CloudWatch.
  • Strong experience with infrastructure as code, Kubernetes, containerization and CI/CD pipelines.
  • Solid understanding of distributed systems, event-driven architectures and IoT communication patterns such as MQTT.
  • Ability to translate complex business requirements into scalable technical solutions.
  • Fluent communication skills in English and Polish and availability to work in a hybrid mode with 1–2 office visits per week.

Your responsibilities

  • Design and develop scalable backend services using TypeScript, Node.js, NestJS and Fastify within distributed systems.
  • Lead the design and evolution of REST APIs using OpenAPI standards and robust validation and versioning strategies.
  • Design and operate AWS-native IoT and event-driven architectures using IoT Core, MQTT, Lambda, Kinesis and related services.
  • Build scalable data processing and automation workflows for telemetry and energy-related data using Timestream, SQS and streaming services.
  • Design and optimize persistence layers using PostgreSQL or Aurora and ensure data consistency and performance.
  • Own infrastructure and deployment design using Terraform or OpenTofu, Kubernetes, Helm and GitLab CI/CD pipelines.
  • Drive engineering best practices, observability, reliability and security standards while supporting GDPR-related backend processes and mentoring team members.
We are looking for a strong backend and cloud engineer with deep experience in IoT and distributed systems who wants to shape and scale modern cloud-native platforms.
You will design and evolve IoT and cloud architectures at OBI Smart Technologies Poland, working across device communication, telemetry processing and automation workflows. You act as a technical driver within the team, contributing to architecture decisions and ensuring scalable, secure and production-ready solutions across AWS environments.
Company

Development opportunities we offer

  • development budget
  • external training
  • intracompany training

What we offer

  • Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more.
  • Language Courses – you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones!
  • Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development.
  • Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions.

Benefits

  • private medical care
  • sharing the costs of foreign language classes
  • sharing the costs of professional training & courses
  • integration events
  • extra social benefits

Recruitment stages

  • 1.
    Tech interview
  • 2.
    HR interview

Reply Polska Sp. z o.o.

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."

This is how we work

Senior Fullstack IoT Engineer
13k–22k zł / mth. (CoE), 135–165 zł / hr. (B2B)
I apply to:
Reply Polska Sp. z o.o.
Katowice, Silesian
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