Mid/Senior Full-Stack Engineer (TypeScript, Node.js, Vue.js, AWS) (B2B)

🏢 Summary: Full-Stack Engineer role focused on building internal developer platforms, tools, and services to improve productivity, automation, and system visibility in a large enterprise environment. The position involves developing TypeScript-based backend services and modern frontend applications while integrating with cloud infrastructure, CI/CD pipelines, and observability platforms. The role requires close collaboration with DevOps and contribution to continuous improvement through troubleshooting and technology evaluation. 🗂️ Requirements: 3+ years commercial experience in full-stack development, University degree in Computer Science, Data Science, Mathematics or related field, Strong TypeScript backend development experience, Experience with Node.js frameworks such as NestJS, Experience building frontend applications with Vue or Nuxt, Experience with event-driven architectures and messaging systems, Understanding of CI/CD pipelines, Experience with AWS cloud services (ECS, EKS, EC2, IAM, Lambda), Experience with Infrastructure as Code tools, Fluent English and Polish, Availability for hybrid work (1–2 office visits per week) 📃 Skills: TypeScript, Node.js, NestJS, Vue, Nuxt, Kafka, GitLab, AWS, ECS, EKS, EC2, IAM, Lambda, Terraform, CDK, CI/CD 🏢 Description: We are looking for a practical and collaborative Full-Stack Engineer to join the Developer Experience (DX) team in a large enterprise environment. The role focuses on building internal developer platforms , tools, and services that improve developer productivity, system visibility, and workflow automation. The ideal candidate has strong TypeScript - based backend development experience, enjoys working with modern frontend technologies, and collaborates closely with DevOps engineers working on cloud infrastructure , CI/CD pipelines, and observability platforms. Design, develop, and maintain backend services and APIs using TypeScript , Node.js , and modern backend frameworks such as NestJS . Build and maintain modern frontend applications using frameworks such as Vue and Nuxt . Develop internal tools and platforms that improve developer productivity and automate development workflows. Collaborate closely with DevOps engineers to ensure applications integrate smoothly with cloud infrastructure , CI/CD pipelines, and observability platforms . Troubleshoot application and platform issues , perform root cause analysis, and support continuous improvement. Research and evaluate new technologies, creating Proofs of Concept (POCs) to assess potential solutions and best practices. Communicate technical concepts clearly and collaborate with both technical and non-technical stakeholders. Benefits 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 you 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. Qualifications 3+ years of commercial experience in full-stack software development. Completed university degree in Computer Science , Data Science, Mathematics, or a related technical field. Strong experience with TypeScript and backend development using Node.js frameworks such as NestJS . Experience building modern frontend applications using frameworks such as Vue or Nuxt . Familiarity with event - driven architectures and messaging systems, such as Kafka . Understanding of CI/CD pipelines , ideally with GitLab CI. Experience working with cloud environments , preferably AWS (ECS, EKS, EC2, IAM, Lambda). Familiarity with Infrastructure as Code tools, such as Terraform or AWS CDK . 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. "

🏢 Summary: Hands-on backend and cloud engineering role focused on building scalable IoT and cloud-native platforms in AWS. The position involves developing backend services, designing REST APIs, and implementing event-driven IoT architectures with strong emphasis on reliability and automation. You will contribute to infrastructure, data processing, and deployment pipelines in a production-grade AWS environment. 🗂️ Requirements: Completed degree in Computer Science or related field, 3+ years of backend development experience with TypeScript and Node.js, Strong knowledge of REST API design and NestJS framework, Hands-on experience with AWS services (Lambda, S3, SQS, IoT Core), Experience with relational databases such as PostgreSQL and ORM tools, Basic experience with containerization and CI/CD pipelines, Experience with infrastructure as code tools, Understanding of cloud-native or event-driven architectures, Fluent English and Polish, Availability for hybrid work (1–2 office visits per week) 📃 Skills: TypeScript, Node.js, NestJS, Fastify, OpenAPI, AWS, Lambda, S3, SQS, IoT, MQTT, Kinesis, Timestream, PostgreSQL, Aurora, TypeORM, Terraform, OpenTofu, Docker, CI/CD, Vue, IoT 🏢 Description: 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 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 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. "

🏢 Summary: Backend-focused Software and Cloud Engineer role focused on building scalable IoT and cloud-native platforms in AWS. The position involves developing backend services, designing REST APIs, and implementing event-driven architectures for device communication and telemetry processing. You will also contribute to infrastructure, deployment, and data processing workflows in production cloud environments. 🗂️ Requirements: Completed degree in Computer Science or related technical field, 3+ years of backend development experience with TypeScript and Node.js, Strong knowledge of REST API design and NestJS, Hands-on experience with AWS services (Lambda, S3, SQS, IoT Core), Experience with PostgreSQL and ORM tools, Basic experience with containerization, CI/CD, and infrastructure as code, Understanding of cloud-native or event-driven architectures 📃 Skills: TypeScript, Node.js, NestJS, Fastify, OpenAPI, AWS, Lambda, S3, SQS, IoTCore, MQTT, Kinesis, Timestream, PostgreSQL, Aurora, TypeORM, Terraform, OpenTofu, Docker, CICD, Vue, REST 🏢 Description: 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. Benefits 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. Qualifications 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 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. "

🏢 Summary: The offer is for a senior backend and cloud engineer to design and scale IoT-driven, cloud-native platforms on AWS. The role focuses on building distributed systems, event-driven architectures, and scalable REST APIs using TypeScript and Node.js. It includes ownership of infrastructure, data processing workflows, and cloud-native deployments in production environments. 🗂️ Requirements: Completed degree in Computer Science or related field, 5+ years of backend engineering experience, Strong expertise in TypeScript, Strong expertise in Node.js, Hands-on experience with NestJS, Experience designing scalable REST APIs in production, Deep experience with AWS services, Experience with infrastructure as code, Experience with Kubernetes and containerization, Experience with CI/CD pipelines, Strong understanding of distributed systems, Knowledge of event-driven architectures, Experience with MQTT and IoT communication, Fluent English, Fluent Polish, Availability for hybrid work (1–2 days onsite per week) 📃 Skills: TypeScript, Node.js, NestJS, Fastify, REST, OpenAPI, AWS, IoT, IoTCore, Lambda, Kinesis, SQS, Timestream, IAM, CloudWatch, MQTT, PostgreSQL, Aurora, Terraform, OpenTofu, Kubernetes, Helm, GitLab, CI/CD 🏢 Description: Responsibilities 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 . Your key responsibilities include: 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. Qualifications 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. 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. "

🏢 Summary: Backend and Cloud Engineer role focused on designing and scaling IoT-driven, cloud-native platforms in AWS. The position involves building distributed backend services, event-driven architectures, and telemetry processing systems while owning infrastructure and CI/CD pipelines. The engineer contributes to architecture decisions and ensures secure, scalable, and production-ready solutions. 🗂️ Requirements: University degree in Computer Science or related field, 5+ years of backend engineering experience, Strong expertise in TypeScript and Node.js, Hands-on experience with NestJS and scalable REST APIs, Deep experience with AWS services including IoT Core, Lambda, Kinesis, SQS, Timestream, IAM, CloudWatch, Experience with infrastructure as code and Kubernetes, Experience with containerization and CI/CD pipelines, Strong knowledge of distributed systems and event-driven architectures, Experience with IoT communication patterns such as MQTT, Fluent English and Polish, Availability for hybrid work (1–2 office visits per week) 📃 Skills: TypeScript, Node.js, NestJS, Fastify, REST, OpenAPI, AWS, IoT, IoTCore, Lambda, Kinesis, SQS, Timestream, IAM, CloudWatch, MQTT, PostgreSQL, Aurora, Terraform, OpenTofu, Kubernetes, Helm, GitLab, CI/CD 🏢 Description: Responsibilities 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 . Your key responsibilities include: 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. Benefits 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. Qualifications 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. 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. "

🏢 Summary: Mid/Senior Backend Developer role focused on building and scaling cloud-native backend systems for retail media and headless advertising platforms. The position involves developing high-performance, distributed services for ad serving, campaign delivery, targeting, analytics, and reporting across digital and physical channels. You will work with modern cloud and DevOps technologies to ensure reliability, scalability, and real-time data processing at scale. 🗂️ Requirements: University degree in Computer Science, Mathematics, Physics or similar, Proven experience as Senior Backend Developer in production environments, Strong expertise in NestJS, NodeJS, and TypeScript, Hands-on experience with AWS and cloud-native architectures, Solid knowledge of Kubernetes and distributed systems, Experience with Terraform, Helm, and GitLab CI/CD, Experience with Kafka or similar messaging platforms, Experience with monitoring, logging, and incident response, Hands-on experience with Grafana, Loki, and Thanos, Experience with online marketing, retail media, or ad tech platforms, Experience with large-scale publisher platforms and CMS, Understanding of multi-tenant architectures, Fluency in English and Polish, Openness to hybrid work in Katowice 📃 Skills: NestJS, NodeJS, TypeScript, AWS, Kubernetes, Terraform, Helm, GitLab, Kafka, Grafana, Loki, Thanos, CI/CD, Docker 🏢 Description: Responsibilities As a Mid or Senior Backend Developer, you will join one of our engineering teams working on the technology platforms that enable OBI’s retail media and First Media capabilities across digital and physical channels. You will contribute to building scalable, data driven backend systems that allow brands to activate media, distribute content, and measure performance along the entire customer journey, from inspiration and planning through to purchase and engagement. You will work on backend services that power headless ad serving, campaign delivery, content distribution, targeting, analytics, and reporting across OBI’s owned channels. These platforms operate at scale, support multi-tenant publisher use cases, and require high reliability and performance for internal product teams and external advertising partners. You will work closely with product, DevOps, and data teams to design, build, and operate backend services that enable real time activation, data processing, and reporting, while ensuring availability, performance, and operational stability across the media technology stack. Key Responsibilities: Design, build, and maintain backend services using NestJS, NodeJS, and TypeScript. Architect and scale headless advertising platforms and backend services for online marketing and retail media use cases. Contribute to the architecture and scaling of distributed, cloud native systems running on AWS and Kubernetes . Collaborate closely with DevOps teams to manage infrastructure using Terraform, Helm, and GitLab CI/CD. Implement and operate event driven and streaming solutions using Kafka . Ensure high availability, performance, and reliability through strong observability practices. Use Grafana, Loki, and Thanos to monitor systems , analyze logs, and support incident response. Actively participate in code reviews, architectural discussions, and technical decision making. Contribute to continuous improvement initiatives across performance, scalability, security, and operational excellence. Support and evolve large scale publisher platforms, multi-tenant content management systems, and advertising platforms. Benefits 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. Qualifications Successfully completed university degree in computer science, mathematics, physics or similar. Proven experience as a Senior Backend Developer in production environments. Deep expertise in NestJS, NodeJS, and TypeScript. Hands on experience with AWS and cloud native architectures. Solid knowledge of Kubernetes , containerized workloads, and distributed systems. Practical experience with Terraform , Helm , and GitLab CI/CD. Experience working with Kafka or comparable messaging and streaming platforms. Strong background in monitoring and alerting, including metrics, logging, and incident response. Hands on experience with Grafana , specifically Loki and Thanos . Proven background in online marketing platforms, retail media, headless ad servers, or ad tech ecosystems. Experience operating or integrating large scale publisher platforms and content management systems. Strong understanding of multi-tenant architectures and information architectures at scale. Fluency in English and Polish . Openness to hybrid work in our Katowice office and collaboration across international teams. 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. "

🏢 Summary: Mid/Senior Backend Developer role focused on building and scaling cloud-native, data-driven backend systems for retail media and headless advertising platforms. The position involves designing high-performance, multi-tenant services for ad serving, campaign delivery, targeting, analytics, and reporting across distributed environments. You will work with modern DevOps and streaming technologies to ensure scalability, reliability, and real-time data processing. 🗂️ Requirements: Completed degree in Computer Science, Mathematics, Physics or related field, Proven experience as Mid or Senior Backend Developer in production environments, Strong expertise in NestJS, NodeJS, and TypeScript, Hands-on experience with AWS and cloud-native architectures, Solid knowledge of Kubernetes and distributed systems, Practical experience with Terraform, Helm, and GitLab CI/CD, Experience with Kafka or similar streaming platforms, Experience with monitoring and logging tools including Grafana, Loki, Thanos, Experience with multi-tenant and large-scale architectures, Background in online marketing, retail media, or ad tech platforms, Fluency in English and Polish 📃 Skills: NestJS, NodeJS, TypeScript, AWS, Kubernetes, Terraform, Helm, GitLab, Kafka, Grafana, Loki, Thanos, CI/CD, Docker 🏢 Description: Responsibilities As a Mid or Senior Backend Developer, you will join one of our engineering teams working on the technology platforms that enable OBI’s retail media and First Media capabilities across digital and physical channels. You will contribute to building scalable, data driven backend systems that allow brands to activate media, distribute content, and measure performance along the entire customer journey, from inspiration and planning through to purchase and engagement. You will work on backend services that power headless ad serving, campaign delivery, content distribution, targeting, analytics, and reporting across OBI’s owned channels. These platforms operate at scale, support multi-tenant publisher use cases, and require high reliability and performance for internal product teams and external advertising partners. You will work closely with product, DevOps, and data teams to design, build, and operate backend services that enable real time activation, data processing, and reporting, while ensuring availability, performance, and operational stability across the media technology stack. Key Responsibilities: Design, build, and maintain backend services using NestJS, NodeJS, and TypeScript. Architect and scale headless advertising platforms and backend services for online marketing and retail media use cases. Contribute to the architecture and scaling of distributed, cloud native systems running on AWS and Kubernetes . Collaborate closely with DevOps teams to manage infrastructure using Terraform, Helm, and GitLab CI/CD. Implement and operate event driven and streaming solutions using Kafka . Ensure high availability, performance, and reliability through strong observability practices. Use Grafana, Loki, and Thanos to monitor systems , analyze logs, and support incident response. Actively participate in code reviews, architectural discussions, and technical decision making. Contribute to continuous improvement initiatives across performance, scalability, security, and operational excellence. Support and evolve large scale publisher platforms, multi-tenant content management systems, and advertising platforms. Benefits 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 you 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. Qualifications Successfully completed university degree in (business) computer science, (business) mathematics, physics or similar. Proven experience as a Mid-level or Senior Backend Developer in production environments. Deep expertise in NestJS, NodeJS, and TypeScript. Hands on experience with AWS and cloud native architectures. Solid knowledge of Kubernetes, containerized workloads, and distributed systems. Practical experience with Terraform, Helm, and GitLab CI/CD. Experience working with Kafka or comparable messaging and streaming platforms. Strong background in monitoring and alerting, including metrics, logging, and incident response. Hands on experience with Grafana, specifically Loki and Thanos. Experience working in large scale organizations with complex stakeholder and system landscapes. Proven background in online marketing platforms, retail media, headless ad servers, or ad tech ecosystems. Experience operating or integrating large scale publisher platforms and content management systems. Strong understanding of multi-tenant architectures and information architectures at scale. Strong collaboration skills and the ability to work across engineering, product, and operations. Fluency in English and Polish. Openness to hybrid work in our Katowice office and collaboration across international teams. 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. "

🏢 Summary: Mid/Senior Backend Developer role focused on building and scaling cloud-native, data-driven backend systems for retail media and headless advertising platforms. The position involves designing distributed services for ad serving, campaign delivery, analytics, and reporting in high-availability environments. You will work with modern DevOps and streaming technologies to ensure performance, scalability, and operational excellence. 🗂️ Requirements: University degree in Computer Science, Mathematics, Physics or related field, Proven experience as Senior Backend Developer in production environments, Deep expertise in NestJS, NodeJS, and TypeScript, Hands-on experience with AWS and cloud-native architectures, Strong knowledge of Kubernetes and distributed systems, Practical experience with Terraform, Helm, and GitLab CI/CD, Experience with Kafka or other messaging and streaming platforms, Experience with monitoring, logging, and incident response, Hands-on experience with Grafana, Loki, and Thanos, Experience with online marketing, retail media, or ad tech platforms, Understanding of multi-tenant architectures at scale 📃 Skills: NestJS, NodeJS, TypeScript, AWS, Kubernetes, Terraform, Helm, GitLab, Kafka, Grafana, Loki, Thanos, CI/CD, DistributedSystems, Microservices, Monitoring, Containerization, AdTech, RetailMedia, MultiTenant 🏢 Description: Responsibilities As a Mid or Senior Backend Developer, you will join one of our engineering teams working on the technology platforms that enable OBI’s retail media and First Media capabilities across digital and physical channels. You will contribute to building scalable, data driven backend systems that allow brands to activate media, distribute content, and measure performance along the entire customer journey, from inspiration and planning through to purchase and engagement. You will work on backend services that power headless ad serving, campaign delivery, content distribution, targeting, analytics, and reporting across OBI’s owned channels. These platforms operate at scale, support multi-tenant publisher use cases, and require high reliability and performance for internal product teams and external advertising partners. You will work closely with product, DevOps, and data teams to design, build, and operate backend services that enable real time activation, data processing, and reporting, while ensuring availability, performance, and operational stability across the media technology stack. Key Responsibilities: Design, build, and maintain backend services using NestJS, NodeJS, and TypeScript. Architect and scale headless advertising platforms and backend services for online marketing and retail media use cases. Contribute to the architecture and scaling of distributed, cloud native systems running on AWS and Kubernetes . Collaborate closely with DevOps teams to manage infrastructure using Terraform, Helm, and GitLab CI/CD. Implement and operate event driven and streaming solutions using Kafka . Ensure high availability, performance, and reliability through strong observability practices. Use Grafana, Loki, and Thanos to monitor systems , analyze logs, and support incident response. Actively participate in code reviews, architectural discussions, and technical decision making. Contribute to continuous improvement initiatives across performance, scalability, security, and operational excellence. Support and evolve large scale publisher platforms, multi-tenant content management systems, and advertising platforms. Qualifications Successfully completed university degree in computer science, mathematics, physics or similar. Proven experience as a Senior Backend Developer in production environments. Deep expertise in NestJS, NodeJS, and TypeScript. Hands on experience with AWS and cloud native architectures. Solid knowledge of Kubernetes , containerized workloads, and distributed systems. Practical experience with Terraform , Helm , and GitLab CI/CD. Experience working with Kafka or comparable messaging and streaming platforms. Strong background in monitoring and alerting, including metrics, logging, and incident response. Hands on experience with Grafana , specifically Loki and Thanos . Proven background in online marketing platforms, retail media, headless ad servers, or ad tech ecosystems. Experience operating or integrating large scale publisher platforms and content management systems. Strong understanding of multi-tenant architectures and information architectures at scale. Fluency in English and Polish . 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. "

🏢 Summary: Full-time Backend Developer role focused on building and maintaining scalable Node.js and TypeScript applications for US clients across various industries, including MVP-stage products. The position involves designing backend architecture, working with SQL/NoSQL databases, and collaborating in Scrum teams in a flexible, remote-first environment. The offer includes long-term cooperation and participation in diverse, technically challenging projects. 🗂️ Requirements: 2+ years commercial experience in Node.js, Experience with Node.js frameworks (Express.js, NestJS or similar), Strong proficiency in TypeScript, Experience with SQL databases, Experience with NoSQL databases, Knowledge of SOLID and KISS principles, Knowledge of design and architecture patterns, Experience with Docker, Experience with GitHub Actions, Basic experience with AWS services, Ability to use ORM or query builders (e.g. Prisma, Knex), English level B2, Polish level C1 📃 Skills: Node.js, TypeScript, JavaScript, Express, NestJS, Fastify, SQL, NoSQL, Prisma, Knex, Docker, AWS, GitHub, GitHubActions, React 🏢 Description: We are looking for skillful Backend Developers to join one of our teams working with US clients - referrals from the high-end American IT market. Our tech stack is built around React, Node.js and TypeScript. We are working with well-established companies and sometimes startups in their early stages (MVPs), which makes the job full of diversity and exciting challenges while crafting cutting-edge solutions. Enjoy the flexibility of working within the Polish time zone and collaborate with clients from diverse industries such as FinTech, SportsTech, MedTech, and many others. Required skills: 2+ years of commercial experience in Node.js, SQL and NoSQL DBs, knowledge of JS frameworks (e.g Express.js, NestJS), experience in TypeScript, SOLID and KISS, knowledge about design and architecture patterns, know how and why Docker and GitHub Actions works, basic usage of AWS services, English B2, Polish C1 Offer: B2B/UZL, paid days off, 100% remote (or hybrid/onsite - as you prefer), Polish time zone, flexible hours, full-time position, long-term contract, Scrum Teams Perks and Benefits: Budgets for self-development, integrations, healthcare & sport activities, Mentoring Program, Individual Career Path, Paid Time Off, Paid Health Break & more Tools you'll use: Apple MacBook Pro, Slack, GSuite, GitHub, Jira, Coda, FigJam Your future tasks and duties: Writing readable and easy-to-maintain JS/TS code with OOP flavor Writing documentation for delivered code Code review of other developers in the team Direct involvement with the design and modification of basic DB structures Propose improvements and share proactive ideas/solutions with the team to enhance the team's work processes Share insights with the team to diagnose issues and focus on solutions Actively participate in project discussions Listen to the client's needs and, after consulting the team, suggest solutions Support less experienced team members About you - Tech skills & Experience: 2+ years of commercial experience in Node.js Good experience with at least one Node.js backend framework (e.g. Express.js, NestJS, Fastify, etc) - you know most of its basic APIs/features, worked on at least 1-2 projects involving such technologies Strong proficiency in TypeScript. You have practical experience with static typing, advanced types, and configuring TS compilers, treating it as your primary language to build robust and type-safe backend applications Potentially worked with NoSQL databases and/or in-memory databases and utilized them as a data store Worked with SQL databases (integration-wise and as a basic design skill) with ORM or query builder tool (ie. Prisma, Knex) Knows the basics of building AI applications (RAG, Agents, etc.) Use AI effectively in their work About you - Soft Skills: English level B2 to cooperate with American clients Polish level C1 to communicate easily within the team Open-minded to new challenges (e.g. different frameworks) Understand the significance of MVP and prioritize the pursuit of excellence and high-quality outcomes, even amid tight project timelines. Communicate with the team to efficiently translate business complexities (user stories/tasks) into solutions (results/estimations) Staying on top with trends/news, sharing them, teaching others and aiming for the best quality solutions Strong problem-solving abilities to diagnose issues, suggest solutions, and make decisions based on project requirements Nice to have: Worked in Agile/Scrum on a daily basis consisting of people with similar skills and monitoring code quality on a daily basis Basic experience with AWS - used some services in specific cases Basic experience with Docker - know how to prepare and debug the environment and connect things up to work locally Worked in the very beginning of the product development/creation stage Understand the significance of MVP and aim to deliver top-notch results, even amid tight project timelines Recruitment process: CV Review Phone call with our Recruiter (15min) Soft-skills interview with our Recruiter (1h) Technical interview with our Specialists (2h) Decision and feedback 🥳 Meaningful projects, top-notch experts and value-driven workplace Sound good? Apply now!

🏢 Summary: A fully remote Full Stack Engineer role in a late-stage product company building a new engineering team in Poland. The position focuses on developing scalable, production-grade applications using TypeScript, React, and Node.js across the stack. Engineers collaborate cross-functionally to deliver end-to-end features with strong emphasis on quality, performance, and reliability. 🗂️ Requirements: Strong proficiency in TypeScript, Experience with React, Experience with Node.js or server-side TypeScript, Understanding of testing practices, Experience with CI/CD, Experience with version control, Ability to work in a collaborative, fast-paced environment 📃 Skills: TypeScript, React, Node.js, CI/CD, Git, APIs, Microservices, AWS, GCP, Azure, Testing 🏢 Description: A late-stage (Series D), well-funded product company is building a brand-new, fully-remote engineering team in Poland. We're looking for talented Full Stack Engineers who can build high-quality, scalable applications using TypeScript , React , and modern backend frameworks. You'll work closely with product, design, and other engineers to deliver features end-to-end. While financial markets experience is a plus, it is not required - strong engineering fundamentals matter more. We are open to candidates who specialize in only front-end or only back-end development, as well as true full-stack engineers. What You'll Do Design, build, and maintain production-grade applications using TypeScript across the stack. Develop intuitive, performant user interfaces using React and modern front-end tooling. Build and maintain backend services, APIs, and integrations (Node.js / TypeScript). Collaborate with product managers and designers to translate requirements into technical solutions. Write clean, testable, maintainable code with strong attention to performance and reliability. Participate in code reviews, architecture discussions, and continuous improvement initiatives. Troubleshoot issues across the stack and contribute to a culture of engineering excellence. Required Skills Strong proficiency in TypeScript . Experience with React for front-end development. Experience with Node.js , server-side TypeScript, or similar backend frameworks. Solid understanding of modern software engineering practices: testing, CI/CD, version control, code reviews. Ability to work in a fast-paced, collaborative environment. Nice to Have Experience working in financial markets , fintech, or trading systems. Familiarity with cloud platforms (AWS, GCP, Azure). Experience with microservices, event-driven architectures, or distributed systems. Exposure to data visualization libraries or real-time data applications. Experience with performance optimization on either the front-end or back-end.