
Infotree Service Sweden Filial · Warsaw
Location: Warsaw (Poland) Working model: on site (5 days/week) Contract type: CoE/B2B Contract duration: until 30.06.2027 We are looking for an experience...
Location: Warsaw (Poland)
Working model: on site (5 days/week)
Contract type: CoE/B2B
Contract duration: until 30.06.2027
We are looking for an experienced and enthusiastic Platform Engineer. You will be responsible for designing and implementing
DevOps processes such as onboarding applications to Kubernetes, deployments, administration, automation, security, documentation
and closely cooperating with Dev teams.
Testing and Production environments in Kubernetes;
environment is functional;
needed in coordination with other DevOps staff in Fiserv;
management processes.
Communicative team player willing to learn and cooperate with others and drive for successful delivery.
You’ll be part of our DevOps team that manages Kubernetes platforms in Azure and AWS. Your task will be to support all required activities for the migration from Azure/Azure DevOps pipelines to AWS/ GitHub Actions. Requirements: Experience: 5+ years of hands-on DevOps, platform engineering, or cloud infrastructure experience, including practical experience with Kubernetes-based application migrations and production-grade cloud environments. Kubernetes and container platforms: Strong knowledge of Kubernetes, Docker, Helm and/or Kustomize, container image management, Kubernetes RBAC, service accounts, ingress controllers, workload troubleshooting, and operational support for production clusters. AWS and EKS expertise: Strong hands-on experience with AWS services required for Kubernetes-based workloads, including EKS, IAM, IRSA, VPC networking, security groups, load balancers, Route 53, JFrog-based image registries, CloudWatch, Secrets Manager or Parameter Store, S3, RDS, and EFS where relevant. Azure expertise: Solid hands-on experience with Azure services commonly involved in application migration, including AKS, Azure DevOps, Azure Container Registry, Azure networking, Azure identity, Key Vault, Azure Monitor, Log Analytics, and related platform integrations. Infrastructure as Code: Expert-level Terraform experience is a must, including designing, building, refactoring, and maintaining infrastructure across Azure and AWS. Experience with reusable modules, remote state, environment separation, and infrastructure migration patterns is expected. CI/CD: Expert-level experience with GitHub Actions is a must. JupyterHub and JupyterLab (required for 1–2 out of 4 positions): Hands-on experience deploying and operating JupyterHub and JupyterLab at scale on Kubernetes in cloud environments (preferably AWS EKS). This includes experience with the Zero to JupyterHub Helm chart, spawner and authenticator customization (OAuth2/OIDC), persistent user storage configuration, resource quotas and auto-scaling of single-user notebook servers, GPU/compute-intensive workload support, and integration with cloud-native services (S3, EFS, IAM/IRSA). Familiarity with multi-tenant JupyterHub administration, user environment management, and observability of notebook workloads is expected. Data and storage migration: Practical understanding of data and storage migration activities, including database migration planning, backup and restore, schema or service compatibility checks, cutover planning, rollback planning, data validation, and migration of persistent storage used by Kubernetes workloads. Networking and connectivity: Strong understanding of cloud and Kubernetes networking, including VNet and VPC concepts, DNS, TLS certificates, ingress and egress traffic, firewall rules, private connectivity, load balancing, service discovery, and connectivity testing between Azure, AWS, and on-premises resources. Security and compliance: Strong security mindset with experience mapping Azure identity and Kubernetes RBAC to AWS IAM and EKS access patterns, implementing least privilege, managing secrets securely, configuring workload identity, scanning container images, applying Kubernetes security best practices, and supporting audit and compliance requirements. Observability and operations: Experience with monitoring, logging, alerting, and troubleshooting in Kubernetes and cloud environments, including CloudWatch, Azure Monitor, Log Analytics, Prometheus, Grafana, OpenTelemetry, application logs, metrics, traces, dashboards, and alert migration. Scripting and automation: Proficiency in at least one scripting language such as Python or Bash, with the ability to automate migration tasks, validation checks, operational runbooks, and pipeline-related activities. Nice to have: AKS to EKS migration experience Experience with migration from Azure DevOps YAML pipelines to GitHub workflows Experience with JupyterHub and JupyterLab
ROLE SUMMARY As a Middleware Engineer, you will support the migration of critical payment processing applications from one data center to another. You will be responsible for middleware platforms that sit between the application and infrastructure layers, ensuring applications continue to operate reliably throughout planning, testing, migration, and post-migration activities. The role combines middleware administration, automation, troubleshooting, documentation, and close collaboration with project managers, infrastructure teams, and application owners. ---------------------------------------------------------------------------------------------------------------------------------- MAIN RESPONSIBILITIES APPLICATION MIGRATION * Support migration of middleware components to new data center environments. * Build, configure, test, and validate middleware services. * Coordinate migration activities with project managers and technical teams. * Resolve technical issues and remove blockers during migration. MIDDLEWARE ADMINISTRATION Manage and support technologies including: * Oracle WebLogic * Oracle Service Bus * Oracle Forms & Reports * Oracle REST Data Services (ORDS) * Oracle Internet Directory * Oracle APEX * Oracle Data Integrator (ODI) OPERATIONS * Perform BAU (Business As Usual) support alongside migration work. * Monitor application performance, availability, and reliability. * Troubleshoot middleware, integration, and deployment issues. * Ensure production stability. AUTOMATION & SCRIPTING Use scripting and automation tools such as: * Shell/Bash * PowerShell * Perl * Python * Rundeck * Ansible DOCUMENTATION * Produce and maintain technical documentation in Confluence. * Document configurations, procedures, migration steps, and operational knowledge. ---------------------------------------------------------------------------------------------------------------------------------- REQUIRED TECHNICAL SKILLS MIDDLEWARE * Oracle WebLogic 11g/12c * Oracle Service Bus * Oracle Forms * Oracle Reports * Oracle REST Data Services (ORDS) * Oracle Internet Directory * Oracle APEX * Oracle Data Integrator (ODI) DATABASE * PL/SQL * Oracle databases SCHEDULING & AUTOMATION * BMC Control-M * Rundeck * Ansible SCRIPTING * Bash/Shell * PowerShell * Python * Perl INFRASTRUCTURE KNOWLEDGE * Networking * Load balancing * TLS/SSL * High availability * Performance monitoring * Resilience and disaster recovery concepts ---------------------------------------------------------------------------------------------------------------------------------- SOFT SKILLS The employer is looking for someone who can: * Communicate effectively in Polish and English. * Work with international teams and SMEs. * Coordinate technical activities across multiple stakeholders. * Take ownership of tasks and deliver on commitments. * Share knowledge and collaborate effectively. * Understand the challenges of migrating business-critical applications. ---------------------------------------------------------------------------------------------------------------------------------- IDEAL CANDIDATE PROFILE A strong candidate would have: * Experience with data center or cloud migration projects. * Middleware administration experience in Oracle technologies. * Knowledge of enterprise application architecture (three-tier architecture). * Experience supporting payment, banking, or other high-availability enterprise systems. * Strong troubleshooting and problem-solving skills. * Familiarity with automation and DevOps practices.
Responsibilities And Qualifications: We are seeking highly collaborative, creative, technical, and intellectually curious engineers who are passionate about developing and implementing cutting-edge cloud computing solutions tailored for the demanding environment of GBM. The ideal candidate will thrive in a dynamic DevOps culture, contributing to customer-centric product development that directly impacts our business. You will work closely with cross-functional teams, acting as a creative collaborator who can evolve, adapt to rapid change, and thrive in a fast-paced, global environment. Your ability to translate complex GBM requirements into scalable, secure, and performant cloud architectures will be key to your success Key Responsibilities: * Lead, mentor, and grow a team of talented cloud engineers, fostering a culture of technical excellence, collaboration, and continuous learning. * Oversee the development and maintenance of a comprehensive set of ready-to-consume cloud patterns and solutions. * Partner with application development teams to facilitate the migration of existing applications and the development of new cloud-native applications on public cloud platforms such as AWS and hybrid architectures. * Champion a frictionless and intuitive cloud onboarding experience for developers, accelerating their transition to public cloud. * Define and prioritize product feature requests that align with the firm’s business and engineering priorities. * Ensure all cloud patterns and solutions are built with a “security-first” mindset, adhering to the highest security standards and best practices. * Drive the implementation of architectural best practices and solutions that are highly available, resilient, and scalable. * Collaborate with other platform teams and stakeholders to define the product’s roadmap and strategic vision. * Provide engineering leadership with regular insights into the progress of customer migrations, reporting on key wins and roadblocks. * Serve as a key member of the customer advisory board to gather customer feedback on their cloud onboarding goals, challenges, and feature requests. * Take an active role in cloud governance, ensuring that any application deployed to production meets the standards set by the firm and fulfills applicable regulatory requirements. Basic Qualifications: * Minimum of 10 years of relevant professional experience with deep expertise in public cloud services (preferably AWS). * Bachelor’s degree in computer science, engineering, or a related field (or equivalent practical experience). * Proven experience as an Engineering Manager or a Senior Technical Lead, with a focus on cloud-native development or platform engineering. * Strong understanding of cloud architecture, microservices, and containerization (eg, Docker, Kubernetes). * Experience with building secure, highly available, and scalable systems, especially in a large, enterprise-level organization. * Experience with hybrid cloud solutions and integrating with on-premise systems. * Excellent leadership, communication, and interpersonal skills.