Technical Infrastructure Engineer (m/f/d)

🏢 Summary: Senior Backend Developer role focused on Java-based cloud development for a large-scale loyalty program, involving solution design, implementation, automated testing, and close collaboration with business stakeholders. The position emphasizes ownership of features from design to production in an agile, cloud-driven environment. Hybrid work model with comprehensive employment benefits. 🗂️ Requirements: At least 7 years of backend development experience, Minimum 5 years in large-scale Java projects with complex codebase, Experience with AWS or another major cloud provider, Experience in writing automated tests, Strong knowledge of Java and backend technologies, Very good German and English skills (minimum B2), Experience working in agile development teams 📃 Skills: Java, JEE, Spring, SpringBoot, REST, Hibernate, Oracle, PostgreSQL, AWS, Maven, Jenkins, Git 🏢 Description: YOUR RESPONSIBILITIES • Java-based software development in the cloud for Germany’s largest loyalty program • Creating solution designs based on the analysis of requirements or error descriptions • Communicating your solution ideas in a way that everyone can understand • Implementing automated test cases • Documenting design and solution approaches YOUR PROFILE • You have at least 7 years of experience in backend development in a professional environment, including at least 5 years in a large-scale project with a complex codebase in a Java environment (or a similar programming language) • Very good German and English skills, both written and spoken (at least B2 level) • You have several years of experience with AWS Cloud or another major cloud provider • You want to see your code in production as quickly as possible. Therefore, you take responsibility not only for coding and testing, but also for coordination with business departments and interfaces • You enjoy driving projects forward, always keep the goal in mind, and embrace challenges • You are eager to understand our customer domain to find the best solutions for their needs • You regularly write software tests and understand the impact of untested code in a continuous delivery environment • You enjoy agile software development in a professional team What we offer Employment contract? Of course. With us you do not have to worry about stable employment. Benefits? We have them! Among other: corporate incentive program, sport card, private medical care. Lunch card? With the cooperation extended and permanent contract, you will receive additional funds to use for meal purchases. Working in a hybrid model? Of course! ! You work with us 2 days a week from home. Work wherever you want? In PAYBACK you have the opportunity. Working 100% remotely, also from European countries for 15 days a year. ‎Flexible working hours? Sounds great! We start working between 7 to 10. Trainings? Of course. We provide training to develop hard and soft skills. Convenient location? Sure! We invite you to our new office at Rondo Daszyńskiego, but we are currently also working remotely. Dress code? We definitely say no. There are no rigid dress code rules in our company, sneakers are more than welcome. Friendly atmosphere at work? Yes! In PAYBACK, people are the most important asset‎. ‎Something is missing? Open communication is our priority, so dare to ask!‎ Tech Stack Java, JEE, Spring, Spring Boot, Web services, REST, Hibernate, strong knowledge of relational databases (Oracle, PostgreSQL), cloud-based systems (AWS or equivalent), Maven, Jenkins, Git

🏢 Summary: Senior technical role leading the design, optimization, and delivery of core business applications within a large IT transformation program. The position focuses on Java-based microservices, cloud and DevOps adoption, and collaboration with architecture and infrastructure teams. It combines hands-on development expertise with technical leadership across strategic platforms. 🗂️ Requirements: 6+ years of experience with Java microservices, Strong experience with JEE and Spring Boot, Experience in API and REST development, Proficiency in Kubernetes, Proficiency in Python, Experience with cloud migration projects, Hands-on experience with Oracle Database and WebLogic, Experience with messaging systems such as IBM MQ or WebSphere, Knowledge of IT security standards, Understanding of functional and technical architecture principles, Fluency in English 📃 Skills: Java, JEE, SpringBoot, REST, API, Microservices, Kubernetes, Python, Oracle, WebLogic, IBMMQ, WebSphere, DevOps, Agile, CloudMigration, Architecture, Security 🏢 Description: Key Responsibilities: Technical Leadership: Provides expert technical guidelines and support to IT analysts and development teams. Application Optimization: Identifies improvement and optimization opportunities for major core business applications. Strategic Delivery: Contributes to the delivery of high-priority projects within core business platforms. Infrastructure Collaboration: Partners with Architects, Security, and Infrastructure teams to design and evolve technical solutions. IT Transformation: Drives the adoption of DevOps, Agile methodologies, and AI readiness as part of broader group transformation programs. Technical Requirements: Java Expertise: Over 6 years of experience with Java microservices, JEE, Spring Boot, and API/REST development. Cloud & DevOps: Proficiency in Kubernetes and Python, with cloud migration expertise and DevOps knowledge listed as significant advantages. Data & Middleware: Experience with Oracle components (Database, WebLogic) and messaging flows such as IBM MQ or WebSphere. Standards & Architecture: Deep awareness of IT security standards, quality metrics, and functional/technical architecture principles. Professional Skills: Fluency in English with the ability to present complex technical topics to senior stakeholders.

🏢 Summary: Design and deliver scalable cloud and hybrid IT architecture solutions with a focus on Microsoft-based infrastructures. Lead cloud transformation and migration initiatives while ensuring alignment with IT security standards. Provide architectural guidance and technical support across project delivery. 🗂️ Requirements: Hands-on experience with Azure Cloud, Hands-on experience with GCP Cloud, Experience designing infrastructure solutions based on Microsoft technologies, Knowledge of IT Security principles and best practices, Experience in cloud transformation and migration projects, English level C1, Work permit in the European Union 📃 Skills: Azure, GCP, AWS, Microsoft, ITSecurity, MDM, Cloud, Infrastructure, Architecture 🏢 Description: 🟣 You will be: designing and developing scalable IT architecture solutions across cloud and hybrid environments, building and maintaining infrastructure solutions based on Microsoft technologies and ecosystem, collaborating with technical teams and business stakeholders to gather requirements and recommend optimal solutions, participating in cloud transformation and migration projects, ensuring solutions align with IT Security best practices and standards, providing architectural guidance and technical support throughout project delivery. 🟣 Your profile: strong hands-on experience with: Azure Cloud GCP Cloud good understanding of IT Security principles and best practices, experience designing and implementing infrastructure solutions based on Microsoft technologies and tools, English - C1, 🟣 Nice to have: experience with AWS Cloud, endpoint Management / MDM skills. Work from the European Union region and a work permit are required. 🟣 Recruitment Process: CV review – HR Call – Technical Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budget of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, ISTQB, PSM, access to Udemy, Safari Books Online and more, events and technology conferences, technology Guilds, internal training, Xebia Library, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. 🤸‍♂️ We are flexible: flexible working hours, contract for an indefinite period.

🏢 Summary: The offer is for a senior DevOps/Platform Engineer role focused on building and scaling CI/CD pipelines, cloud infrastructure, and observability solutions to ensure high availability, reliability, and fast software delivery. The position involves working with Kubernetes, cloud platforms, GitOps, and AI-related tooling to support modern, scalable application environments. It requires strong hands-on technical leadership and expertise in automation, infrastructure as code, and monitoring. 🗂️ Requirements: 5+ years of experience with DevOps practices and Continuous Delivery, Hands-on experience with AWS and Azure services, Strong experience with Kubernetes (EKS, AKS) and container orchestration, Proficiency in Terraform and Helm, Experience with GitOps practices (e.g., ArgoCD), Experience with CI/CD pipelines (GitLab CI/CD, GitHub Actions or similar), Strong scripting skills in Bash and PowerShell, Python knowledge, Experience with monitoring and observability tools, Strong networking knowledge, Experience with AI Agents and Claude Code, Experience with FastMCP or other MCP libraries, Knowledge of security best practices (OWASP, encryption, secrets management), Upper intermediate/advanced English (B2/C1), Work permit and residence in the European Union 📃 Skills: AWS, Azure, Kubernetes, EKS, AKS, Terraform, Helm, ArgoCD, GitLab, GitHub, Python, Bash, PowerShell, Prometheus, Grafana, AppDynamics, OpenSearch, Claude, FastMCP, FluxCD, Harness, Rancher, Keycloak, Networking, GitOps, CI/CD 🏢 Description: 🟣 You will be: building and supporting the tools, processes and infrastructure empowering the faster delivery and scaling of software iterations (ideally with greater quality and the necessary operational insight), ensuring availability, reliability and scalability of application infrastructure, building and supporting continuous integration/delivery and release tools, ensuring the right metrics are collected and monitored. 🟣 Your profile: hands-on experience as a tech leader, smart and tech-savvy engineer with 5+ years of experience working with DevOps practices and Continuous Delivery, practical knowledge of AWS and Azure services, infrastructure and networking, solid experience with Kubernetes (EKS and AKS) and container orchestration, Python knowledge, strong networking skills, experience in Claude Code, experience in working with AI Agents, experience in FastMCP or other MCP libraries, hands-on with GitOps practices, preferably with ArgoCD, strong skills in Terraform and Helm, proficiency in Bash and PowerShell scripting, experience with CI/CD pipelines and tooling (GitLab CI/CD, GitHub Actions, or similar), experience with monitoring, observability, and logging tools, such as Prometheus, Grafana, AppDynamics, and OpenSearch, security awareness (OWASP, encryption, secrets management), very communicative and collaborative, with a strong sense of ownership, upper intermediate/advanced English (B2/C1). Work from the European Union region and a work permit are required 🟣 Nice to have: AWS/ Azure certifications such as Solutions Architect or Platform Engineer, familiarity with FluxCD, experience with Harness, experience with Rancher, knowledge of Keycloak. 🟣 Recruitment Process: CV review – HR Interview – Technical Interview - Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. 🤸‍♂️ We are flexible: B2B or employment contract, contract for an indefinite period.

🏢 Summary: Senior Technical Consulting Specialist role focused on supporting and evolving complex IT systems in large-scale projects with high requirements for stability, security, and scalability. The position involves development, architecture design, DevOps practices, and migration to container and cloud technologies. Full-time engagement starting June/July 2026 with on-site presence in Mainz and remote work. 🗂️ Requirements: Experience in technical design and development of police information and case management systems, Strong object-oriented programming knowledge, Strong knowledge of C# and .NET, Practical experience with .NET Framework 4.8 or higher, Experience with ASP.NET, MVC, WCF, WF, Experience with Windows development using C# and .NET (Windows Forms, WPF), Experience in client-server development, Experience in developing database-driven applications with ADO.NET, LINQ, Entity Framework, Knowledge of Transact-SQL, Experience in creating and extending XML-based interfaces, Experience with automated testing tools, Experience with SQL Server Reporting Services (SQL Server 2016+), Experience with Visual Studio 2019+, Experience with Microsoft SQL Server 2016+, Experience with Windows Server 2016+, Experience with IIS 10.0+, Experience with Azure DevOps Server and Team Foundation Server 📃 Skills: C#, .NET, ASP.NET, MVC, WCF, WF, AJAX, HTML5, XML, XSD, JavaScript, Python, VisualBasic, PowerShell, WindowsForms, WPF, ADO.NET, LINQ, EntityFramework, T-SQL, SSRS, VisualStudio, SQLServer, WindowsServer, IIS, AzureDevOps, TFS, Microservices, DevOps 🏢 Description: Einleitung & Zusammenfassung: Der Senior Technical Consulting?Spezialist übernimmt anspruchsvolle technische Aufgaben in komplexen IT-Systemlandschaften und unterstützt den Auftraggeber über den gesamten Lebenszyklus der Anwendungen hinweg. Der Einsatz erfolgt in mittleren und großen IT-Projekten mit hohen Anforderungen an Stabilität, Sicherheit und Skalierbarkeit. Start: Juni/ Juli 2026 Dauer: 12 M+ Einsatzort: Mainz (Rheinland-Pfalz) und remote Auslastung: Vollzeit Bereitschaft zur Rufbereitschaft: ja Hauptverantwortlichkeiten: Eigenverantwortliche Analyse und Behebung komplexer Fehler (Bugfixes und Workarounds) Aktualisierung und Erweiterung bestehender Anwendungen (Major- und Minor-Releases) Telefonische und fachliche Beratung des Auftraggebers im laufenden Betrieb der Anwendungen Qualifizierte Mitarbeit bei der Pflege und Weiterentwicklung technischer Dokumentationen Mitwirkung an Architektur- und Code-Reviews Aktive Unterstützung und Umsetzung des DevOps-Ansatzes Design und Konzeption skalierbarer Systeme und Applikationen Implementierung und aktive Mitarbeit im Umsetzungsteam Einbringung agiler Methoden sowie innovativer Technologien in die Projekte Technische Beratung bei der Migration auf Container- und Cloud-Technologien Fachliche Anforderungen (Muss-Kriterien): Gute Kenntnisse in der Fachkonzeption und Entwicklung polizeilicher Informations- und Vorgangsbearbeitungssysteme Sehr gute Kenntnisse in der objektorientierten Programmierung (OOP) und (Micro-)Service-Architekturen Sehr gute Kenntnisse in C# / .NET Gute, praxisnahe Kenntnisse des .NET Frameworks ab Version 4.8 Gute Kenntnisse in ASP.NET, MVC, WCF, WF, AJAX, ATLAS, HTML5, XML, XSD, JavaScript, XPS, Python, Visual Basic, PowerShell Gute Kenntnisse in der Windows-Programmierung mit C# / .NET, Windows Forms und WPF Kenntnisse in der Client-Server-Entwicklung Gute Kenntnisse in der Entwicklung datenbankbasierter Anwendungen mit ADO.NET, LINQ und Entity Framework Kenntnisse in Transact-SQL Kenntnisse in der Erstellung und Erweiterung XML-basierter Schnittstellen Ausreichende Kenntnisse im Einsatz von Testtools für automatisierte Tests Gute Kenntnisse in SQL Server Reporting Services (ab SQL Server 2016) Kenntnisse im Umgang mit Visual Studio 2019 und höher, Microsoft SQL Server 2016 und höher, Windows Server 2016 und höher, IIS 10.0 und höher, Azure DevOps Server und Team Foundation Server 2013, 2015, 2017 und höher Wir freuen uns auf Ihre Kontaktaufnahme!

🏢 Summary: Senior Backend Engineer role focused on defining the technical direction and architecture of a domain within a borderless financial platform. The position involves designing scalable microservices, driving architectural decisions, and leading a small backend team in a distributed environment. The role emphasizes reliability, security, and high‑volume transaction processing in a cloud-based ecosystem. 🗂️ Requirements: 4-7 years backend engineering experience, Proficiency in Go, Experience with Java 21 or modern Java, Experience designing microservices with clear contracts, Experience with caching strategies including TTL and invalidation, Experience with event-driven or asynchronous architectures, Experience with structured logging, metrics, and alerting, Experience with AWS services, Experience with relational and non-relational databases, Experience with Spring Boot or similar frameworks, Experience reviewing code and architectural decisions, Availability to work in GMT+5:30 timezone 📃 Skills: Java, Go, Spring, JDBI, PostgreSQL, CockroachDB, DynamoDB, Redis, SQS, SNS, Kafka, AWS, EKS, ALB, RDS, S3, Kong, Datadog, Quickwit, JWT, RBAC, TLS, Docker, ArgoCD, GitHub, Microservices, Kafka, CDC 🏢 Description: Project overview This project focuses on developing a borderless financial platform that supports international banking flows, payments, account management and regulatory compliant operations. The product handles sensitive data and high volume transactions while prioritising reliability and security. Team You will work in a distributed environment with backend engineers, a product manager and platform specialists. The role involves leading a sub team of three to five engineers, conducting design reviews, ensuring code quality standards and supporting collaborative decision making. Position overview We are looking for a Senior Backend Engineer who will define the technical direction of a backend domain and drive architectural decisions. You will design microservices, create scalable solutions, guide a small engineering group and collaborate closely with product specialists to shape the delivery roadmap. We are looking for a person willing to work in the time zone: GMT+5:30. Technology stack Java 21, Go, Spring Boot, JDBI, custom workflow engines, PostgreSQL, CockroachDB, DynamoDB, Redis, SQS, SNS, Kafka, AWS EKS ALB RDS S3 Secrets Manager, Kong API Gateway, Datadog, Quickwit, JWT RBAC TLS request and response encryption VAPT, GitHub Actions, Docker, ArgoCD, microservices, event driven architecture, saga and orchestration patterns, CDC pipelines, maker checker workflows Responsibilities Plan and design backend microservices with clear boundaries and contracts Develop solutions for domains such as onboarding, payments, transaction orchestration or platform components Break complex epics into actionable tasks with clear acceptance criteria Review designs from other engineers to ensure scalability and fault tolerance Drive technical decisions including caching layers, asynchronous processing strategies, database choices and API versioning Evaluate build versus buy options for integrations and services Collaborate with a product manager to align on scope and prioritisation Lead a sub team of backend engineers and support their professional growth Support incident response, root cause analysis and long term improvements Monitor service performance using logging, metrics and tracing tools Requirements Professional backend engineering experience from 4-7 years Experience with Go (tooling & CLIs) Experience designing microservices with well-defined contracts and boundaries Experience with Java 21 or modern Java versions Experience with caching strategy design, including TTL and invalidation approaches Experience working with asynchronous processing, event-driven architecture, or queue-based workflows Experience using structured logging, metrics, and alerting to debug production systems Experience in making build versus buy decisions with clear trade-off analysis Experience reviewing code and identifying architectural or contract issues Experience with AWS-based services Experience working with relational and non-relational databases such as PostgreSQL or DynamoDB Experience writing backend services using Spring Boot or similar frameworks Nice to have Experience with financial or payments related systems Experience with KYC or AML flows Experience with workflow or orchestration engines Experience with platform wide pattern creation or reusable service design Experience with data encryption practices and security audits Experience with CockroachDB or high availability distributed databases What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: Full Stack Developer role focused on building and maintaining scalable eCommerce solutions using SAP Commerce (Hybris) with Java/Spring on the backend and React or Angular on the frontend. The position involves designing APIs, contributing to headless/composable architectures, and ensuring high code quality through testing and reviews. It requires collaboration in cross-functional teams and participation in architectural decisions. 🗂️ Requirements: Bachelor’s degree in Computer Science, Software Engineering or related field, Minimum 2 years of professional full stack development experience, Strong proficiency in Java, Strong proficiency in Spring framework, Hands-on experience with React and/or Angular, Experience with SAP Commerce (Hybris) or enterprise eCommerce platforms, Knowledge of RESTful API design, Experience with SQL and/or NoSQL databases, Experience with Git and CI/CD pipelines, Experience with Docker or other containerization tools, Understanding of design patterns and software development best practices, English and Polish language proficiency, Availability for hybrid work or quarterly office visit 📃 Skills: Java, Spring, SpringBoot, SpringMVC, React, Angular, JavaScript, SAP, Hybris, REST, SQL, NoSQL, Git, CICD, Docker 🏢 Description: Responsibilities Design, develop, and maintain scalable web-based eCommerce solutions using SAP Commerce (Hybris) Build backend services and APIs with Java and Spring (Spring Boot, Spring MVC, etc.) Develop modern and responsive frontends using JavaScript frameworks such as React or Angular Contribute to frontend integration with headless or composable commerce architectures Analyze business requirements and translate them into technical specifications Participate in architectural discussions and contribute to technical design decisions Conduct peer code reviews and support junior developers through mentoring and feedback Collaborate with cross-functional teams including QA, Product, UX, and DevOps Write unit and integration tests to ensure software quality and maintainability Troubleshoot and resolve issues in existing applications and systems 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 Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience) 2+ years of professional experience in full stack development Strong proficiency in Java and Spring framework Hands-on experience with React and/or Angular, and strong knowledge of JavaScript Experience with SAP Commerce (Hybris) or other enterprise-level eCommerce platforms Familiarity with modern frontend development practices (component-based architecture, state management) Understanding of RESTful API design and backend/frontend integration Working knowledge of databases (SQL and/or NoSQL) Experience with Git, CI/CD pipelines, and containerization (e.g., Docker) Strong understanding of design patterns and best practices in software development Excellent problem-solving and communication skills Good communication skills in English and Polish. Availability to work in a hybrid mode or remotely with at least 1 visit in the office per quarter About Portaltech Reply Portaltech Reply, a subsidiary of the Reply Group, specializes in Customer Experience and Engagement solutions, operating globally with offices in Italy, UK, Germany, US, and Poland. Initially establishing its international presence through partnerships with Hybris and later SAP, dating back to 2007, Portaltech Reply now offers a broader range of technologies, including SAP Customer Experience Suite, Akeneo, Coveo, Mirakl, Contentful, and Shopify. Our project portfolio primarily focuses on expanding the Customer Experience vision, covering areas such as Digital Commerce, Customer Data and Engagement, CRM, Marketing and Voice of Customer solutions. With a wealth of experience in Digital Transformation programs, Portaltech Reply offers deep technical expertise in complex integration environments and proprietary vertical solutions. Our consultancy services encompass business processes, customer experience best practices, engagement strategies, and end-to-end project delivery advisory. In 2023, Portaltech Reply has partnered with Shopify, aiming to enhance Shopify's enterprise sector expansion through their two-decade-long expertise in customer experience solutions, particularly tailored for mid-sized to large enterprises. This collaboration leverages Portaltech Reply's strengths alongside Shopify's recent platform enhancements, setting a trajectory for offering more comprehensive solutions to enterprise and mid-market clients.