Platform Engineer

🏢 Summary: 100% remote Cloud Platform Engineer role on an initial 6-month B2B contract focused on building and evolving a strategic multi-cloud platform. The position involves developing cloud infrastructure and implementing CI/CD and GitOps practices to support scalable deployments. High likelihood of long-term extension based on project needs. 🗂️ Requirements: Professional experience with Crossplane, Professional experience with Kubernetes, Professional experience with Azure, Strong knowledge of CI/CD, Strong knowledge of GitOps, Experience building and managing multi-cloud infrastructure, Experience implementing and maintaining CI/CD pipelines 📃 Skills: Crossplane, Kubernetes, Azure, CI/CD, GitOps, Go 🏢 Description: Location: 100% remote Duration: Initial 6-month B2B contract with a high likelihood of multi-year extension. Rate: up to 45 EUR/h Your availability : 2 weeks notice The Cloud Platform Engineer role is focused on contributing to a significant multi-cloud platform project that is crucial for the future infrastructure of the organization. Main Responsibilities: Develop and manage a multi-cloud platform infrastructure. Collaborate with cross-functional teams to enhance cloud capabilities. Implement and maintain CI/CD pipelines for efficient deployment. Key Requirements: Crossplane, Kubernetes, Azure: Proven professional experience, CI/CD & GitOps: Strong working knowledge, Nice to Have: Go (Golang): Experience with tooling and automation,

🏢 Summary: 12+ month B2B contract for a remote Platform Engineer to design and operate a Kubernetes-based internal cloud platform enabling reliable deployments for application and data teams. The role focuses on building self-service CI/CD capabilities, ensuring platform reliability, security, and observability, and supporting multi-environment, primarily Azure-based, deployments. 🗂️ Requirements: Strong expertise in Kubernetes (AKS and on-prem), Hands-on experience with CI/CD pipelines, Proficiency in Azure DevOps YAML, Solid understanding of platform reliability, observability, and security, Operational experience in multi-cloud environments, Experience working with Microsoft Azure 📃 Skills: Kubernetes, AKS, Azure, AzureDevOps, YAML, CICD, Observability, Security, Multicloud 🏢 Description: Summary: The Platform Engineer role focuses on building and operating a shared cloud platform to facilitate reliable deployments for application and data teams. This position combines platform engineering expertise with DevOps practices and data-platform exposure, particularly concerning Kubernetes environments. What we offer: Contract Length: 12 months+ prolongation Type of contract: B2B Contract Work Model: Remote Main Responsibilities: Design and operate a Kubernetes-based internal platform for application and data workloads. Provide self-service deployment and runtime capabilities for engineering teams via standardized pipelines and templates. Build and maintain CI/CD pipelines as platform components, primarily using Azure DevOps YAML. Operate and evolve platform integrations for data systems , including Snowflake-based workloads. Ensure platform reliability, observability, and security across environments. Support multi-environment and multi-cloud deployments , primarily in Azure. Own operational aspects of the platform, including troubleshooting, incident response, and continuous improvements. Key Requirements: Kubernetes expertise (AKS and on-prem Kubernetes) Experience with CI/CD pipelines, notably Azure DevOps YAML Strong understanding of platform reliability, observability, and security Operational experience in multi-cloud environments (Azure preference) Nice to Have: Experience with Snowflake Familiarity with AWS/GCP Proficiency with Terraform Knowledge of Bash and Python Experience with AI technologies

🏢 Summary: Role for an experienced Kubernetes / Platform Engineer responsible for designing, implementing and developing modern container platforms in on-premise and hybrid environments. The position focuses on building and integrating Kubernetes clusters with data center infrastructure, automating processes, and supporting production environments. Opportunity to work on advanced infrastructure projects with real impact on architecture and technology choices. 🗂️ Requirements: Minimum 3 years of experience with Kubernetes, DevOps or Linux, Experience in at least 2 Kubernetes or container platform implementation projects, Strong knowledge of Kubernetes architecture, components and CNI networking, Good knowledge of Linux systems (RHEL, Ubuntu or Rocky), Knowledge of data center infrastructure: networking (L2/L3, load balancing), storage, compute, virtualization, HA, Experience with automation tools such as Terraform or Ansible, Ability to design architecture and analyze technical problems, English proficiency for working with technical documentation 📃 Skills: Kubernetes, RKE2, OpenShift, Rancher, OKD, Linux, RHEL, Ubuntu, Rocky, Terraform, Ansible, GitOps, ArgoCD, Flux, Ceph, Networking, CNI, L2, L3, HA, Virtualization, CICD, Storage, Compute 🏢 Description: Poszukujemy doświadczonego Kubernetes / Platform Engineera , który będzie odpowiedzialny za projektowanie, wdrażanie oraz rozwój nowoczesnych platform kontenerowych w środowiskach on-premise i hybrydowych. To rola dla osoby, która chce pracować z zaawansowaną infrastrukturą, projektować architekturę rozwiązań i mieć realny wpływ na środowiska produkcyjne klientów. 🔧 Zakres obowiązków Projektowanie, wdrażanie i rozwój platform Kubernetes (on-prem / hybrid) Budowa i konfiguracja klastrów (upstream Kubernetes, RKE2, OpenShift, Rancher) Integracja Kubernetes z infrastrukturą data center (compute, network, storage) Analiza wymagań klientów oraz dobór architektury rozwiązania Automatyzacja procesów (Infrastructure as Code, GitOps) Diagnostyka, optymalizacja i utrzymanie środowisk produkcyjnych Testowanie i walidacja nowych technologii Wsparcie klientów w utrzymaniu i rozwoju platform Współpraca z zespołami projektowymi oraz udział w działaniach pre-sales Wymagania Min. 3 lata doświadczenia w obszarze Kubernetes / DevOps / Linux Udział w co najmniej 2 projektach wdrożeniowych (Kubernetes / platformy kontenerowe) Bardzo dobra znajomość Kubernetes (architektura, komponenty, networking – CNI) Dobra znajomość systemów Linux (RHEL / Ubuntu / Rocky Linux) Wiedza z zakresu infrastruktury data center: networking (L2/L3, load balancing) storage (block / file / object, np. Ceph) compute / wirtualizacja / HA Doświadczenie z narzędziami automatyzacji (Terraform, Ansible lub podobne) Umiejętność analizy problemów i pracy projektowej Znajomość języka angielskiego (praca z dokumentacją techniczną) Mile widziane Certyfikacje Kubernetes (CKA / CKAD / CKS) Doświadczenie z OpenShift, Rancher, OKD Znajomość GitOps (ArgoCD, Flux) Doświadczenie z systemami storage (np. Ceph) Znajomość narzędzi CI/CD Oferujemy Pracę przy zaawansowanych projektach infrastrukturalnych Realny wpływ na architekturę rozwiązań Możliwość pracy z nowoczesnym stackiem (Kubernetes, GitOps, IaC) Rozwój kompetencji w obszarze platform engineering i cloud-native Elastyczne formy współpracy (B2B / UoP) Przyjazną atmosferę i współpracę z doświadczonym zespołem

🏢 Summary: The offer is for a Senior Platform Engineer responsible for designing, building, and operating scalable Kubernetes-based platforms on AWS. The role focuses on backend platform development, Infrastructure as Code with Terraform, CI/CD automation, and improving developer experience through self-service and multi-tenant solutions. It involves driving reliability, observability, and automation across a cloud-native ecosystem. 🗂️ Requirements: 5+ years of experience as a Platform Engineer, Strong hands-on experience with Kubernetes, including cluster operations, Strong programming skills in TypeScript or Go, Experience with AWS or other cloud platforms, Experience with Infrastructure as Code tools, preferably Terraform, Experience with CI/CD pipelines and deployment automation, Experience designing scalable multi-tenant systems, Strong understanding of API and platform architecture, Solid Linux and networking fundamentals, Experience with observability and monitoring solutions, Experience building self-service platform capabilities, Practical experience using AI-powered coding assistants, Work permit and residence in the European Union 📃 Skills: Kubernetes, AWS, Terraform, TypeScript, Go, Python, CI/CD, Linux, Networking, APIs, Docker, OpenTelemetry, Backstage, GitHub, Claude, Cursor 🏢 Description: 🟣 You will be: designing, building, and operating scalable Kubernetes-based platform infrastructure, developing backend platform services and reusable engineering components, building and maintaining cloud-native solutions (primarily on AWS), creating and evolving Infrastructure as Code solutions using Terraform, designing and implementing CI/CD pipelines and deployment automation, developing scalable multi-tenant platform capabilities for engineering teams, building self-service developer platform features and internal tooling, designing and maintaining APIs and platform architecture standards, improving platform reliability, observability, and monitoring capabilities, collaborating with engineering teams to improve developer experience and platform adoption, contributing to platform engineering best practices and technical standards, supporting container platform operations and orchestration processes, driving automation and operational excellence across the platform ecosystem. 🟣 Your profile: 5+ years of experience as a Platform Engineer, practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, strong hands-on experience with Kubernetes, including cluster operations and orchestration concepts, strong backend engineering background, strong programming skills in TypeScript and/or Go; Python experience is a plus, solid experience with cloud platforms, preferably AWS, practical experience with Infrastructure as Code tools, preferably Terraform, experience with CI/CD pipelines and deployment orchestration, experience designing scalable multi-tenant systems, strong understanding of API and platform architecture, solid Linux and networking fundamentals, experience with observability and monitoring solutions, experience building reusable self-service platform capabilities for developers, good English communication skills (at least B2 level). 🟣 Nice to have: experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches, experience with Internal Developer Platforms (IDP), experience building Kubernetes operators and controllers, experience with Backstage or developer portal tooling, experience in container runtime or platform engineering, knowledge of event-driven and distributed systems architecture, experience with service mesh technologies and OpenTelemetry. Work from the European Union region and a work permit are required. 🟣 Recruitment Process: CV review – HR Call – Interview – Client 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, B2B or permanent contract, contract for an indefinite period.

🏢 Summary: Cloud Platform Engineer for a 100% remote, 6-month B2B contract focused on building and managing a strategic multi-cloud platform. The role involves developing cloud infrastructure, enhancing cloud capabilities, and implementing CI/CD pipelines to support scalable deployments. There is a strong likelihood of long-term extension. 🗂️ Requirements: Proven professional experience with Crossplane, Proven professional experience with Kubernetes, Proven professional experience with Azure, Strong working knowledge of CI/CD, Strong working knowledge of GitOps, Availability within 2 weeks notice 📃 Skills: Crossplane, Kubernetes, Azure, CI/CD, GitOps, Golang 🏢 Description: Location: 100% remote Duration: Initial 6-month B2B contract with a high likelihood of multi-year extension. Your availability : 2 weeks notice The Cloud Platform Engineer role is focused on contributing to a significant multi-cloud platform project that is crucial for the future infrastructure of the organization. Main Responsibilities: Develop and manage a multi-cloud platform infrastructure. Collaborate with cross-functional teams to enhance cloud capabilities. Implement and maintain CI/CD pipelines for efficient deployment. Key Requirements: Crossplane, Kubernetes, Azure: Proven professional experience, CI/CD & GitOps: Strong working knowledge, Nice to Have: Go (Golang): Experience with tooling and automation,

🏢 Summary: 6-month remote B2B contract (with strong extension potential) for a Cloud Platform Engineer to build and evolve a strategic multi-cloud platform. The role focuses on developing cloud infrastructure, enhancing cloud capabilities, and implementing robust CI/CD processes. The position supports a long-term, future-oriented cloud transformation initiative. 🗂️ Requirements: Proven experience with Crossplane, Proven experience with Kubernetes, Proven experience with Azure, Strong knowledge of CI/CD, Strong knowledge of GitOps, Availability within 2 weeks 📃 Skills: Crossplane, Kubernetes, Azure, CI/CD, GitOps, Go, Golang 🏢 Description: Location: 100% remote Duration: Initial 6-month B2B contract with a high likelihood of multi-year extension. Your availability : 2 weeks notice The Cloud Platform Engineer role is focused on contributing to a significant multi-cloud platform project that is crucial for the future infrastructure of the organization. Main Responsibilities: Develop and manage a multi-cloud platform infrastructure. Collaborate with cross-functional teams to enhance cloud capabilities. Implement and maintain CI/CD pipelines for efficient deployment. Key Requirements: Crossplane, Kubernetes, Azure: Proven professional experience, CI/CD & GitOps: Strong working knowledge, Nice to Have: Go (Golang): Experience with tooling and automation,

🏢 Summary: Remote B2B Cloud Platform Engineer role focused on designing, building, and operating Azure-based infrastructure using Infrastructure as Code. The position combines cloud engineering and operational support, including maintaining Azure subscriptions, Kubernetes clusters, and resolving incidents. You will collaborate with technical teams to deliver scalable, secure, and reliable cloud environments. 🗂️ Requirements: 3+ years experience with Azure core services (Resource Manager, VMs/Scale Sets, Storage, Networking), 3+ years experience with Azure Kubernetes Service, 2+ years experience with Terraform, 3+ years experience in Windows or Linux administration, Experience designing and maintaining IaaS and PaaS in Azure, Experience troubleshooting cloud infrastructure incidents, Ability to create technical documentation (runbooks, diagrams) 📃 Skills: Azure, AKS, Terraform, ARM, Bicep, AzureDevOps, GitHubActions, Ansible, Kafka, MongoDB, Elasticsearch, Bash, PowerShell, Linux, Windows, Networking, DNS, LoadBalancer, AppGateway, PrivateLink 🏢 Description: Cloud Platform Engineer Work mode: Remote from Poland Type of contract: B2B contract Summary: We are looking for a talented and experienced Cloud Engineer to join our growing team. As well as experience with cloud infrastructure, networking, and security, the Cloud Platform Engineer will be responsible for operating, monitoring, and maintaining our many Azure subscriptions and associated global applications. This is a cloud infrastructure role. As a Cloud Platform Engineer with cloud architecture, you will work closely with other data professionals, software engineers, and business stakeholders to build, maintain and support[CU1] [MU2] efficient, scalable, and secure data pipelines. This role involves both engineering and operations, requiring comfort with project work and handling incident tickets as part of the team. Responsibilities: Design, build and maintain Azure based infrastructure with Terraform modules (IaaS and PaaS resources) as part of new projects or updates needed to production environments Troubleshoot IaaS and PaaS issues raised via SNow incident and meet ticket closure SLA’s Documentation and knowledge sharing: create and maintain environment diagrams, playbooks, runbooks, and best practice documents Communicate with internal business partners including guidance on application design Qualifications: MUST 3+ years of experience with Azure core services: Resource Manager, Virtual Machines/Scale Sets, Storage (Blob/Files), Networking (VNets, NSGs, Load Balancer, App Gateway, DNS, Private Link) 3+ year of experience in Windows or Linux administration, with strong problem-solving abilities 3+ years of experience with Azure Kubernetes Service 2+ years of experience with Terraform Ability to work independently and initiate tasks without supervision and utilize strong interpersonal and organizational skills, including the ability to meet deadlines, work in a team environment, follow written policies and procedures and always maintain superior customer service Excellent problem-solving and analytical skills NICE TO HAVE [MU3] [J(4] Experience with BICEP and/or ARM templates CI/CD and automation: Azure DevOps Pipelines or GitHub Actions (YAML) Familiarity with configuration management tools, preferably Ansible Familiarity with configuring and managing Kafka/MongoDB/Elasticsearch Competency in scripting languages such as Bash, Shell, or PowerShell Strong communication and teamwork skills 📩 If you’re interested and meet the qualifications, please send your CV to Alina Pchelnikova at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: The offer is for a Platform Engineer to design, build, and support custom web applications and cloud infrastructure across AWS, Azure, CoreWeave, and on-prem environments. The role focuses on Infrastructure-as-Code, API integration, and ensuring system reliability and performance for technical users. It combines platform engineering, DevOps, and full-stack collaboration in enterprise environments. 🗂️ Requirements: 2+ years in platform engineering or DevOps-focused role, Experience with Linux administration, Proficiency in Python, Experience with Docker and Kubernetes, Experience with Terraform for Infrastructure-as-Code, Knowledge of modern JavaScript frameworks, Experience with AWS or Azure, Ability to design and maintain cloud infrastructure, Experience working with APIs and datasets 📃 Skills: Linux, Python, Docker, Kubernetes, Terraform, AWS, Azure, CoreWeave, JavaScript, React, Node.js, AWSCDK, APIs, DevOps 🏢 Description: THE WORK As a Platform Engineer, you will design, build, and support custom web applications running across enterprise environments such as AWS, Azure, CoreWeave, and on-prem infrastructure. You’ll support users in working with APIs and datasets, helping them configure, optimize, and operate these systems effectively. The role also includes designing and maintaining cloud infrastructure using Infrastructure-as-Code tools like Terraform and AWS CDK. You’ll collaborate with highly technical users, so clear communication and strong Linux skills are essential for troubleshooting, performance tuning, and ensuring system reliability. HERE’S WHAT YOU NEED Around 2+ years of experience in platform engineering or a similar development/DevOps-focused role Solid experience working with modern infrastructure and development stacks, including Linux, Python, Docker/Kubernetes, DevOps practices, and modern JavaScript frameworks (e.g. React or Node.js) Hands-on experience with Infrastructure-as-Code tools such as Terraform Strong problem-solving skills and ability to communicate complex technical topics clearly BONUS POINTS Experience with AI / LLMs or High-Performance Computing (HPC) Background in Data Engineering or Data Science Strong Linux expertise, including deeper OS-level understanding Experience with AWS services Building or supporting full-stack applications using cloud APIs

🏢 Summary: The offer is for a Platform Engineer to build and operate an Internal Developer Platform that enables self-service capabilities, deployment automation, and standardized software delivery. The role focuses on designing scalable platform components, implementing CI/CD and GitOps workflows, and enhancing developer experience across engineering teams. It involves driving cloud-native infrastructure, automation, and observability practices to accelerate application development. 🗂️ Requirements: 3–7+ years in Platform Engineering, DevOps, SRE, or Software Engineering, Hands-on experience with Kubernetes and Docker, Experience with Infrastructure as Code using Terraform, Experience building CI/CD pipelines, Experience with GitOps deployment processes, Programming skills in Go, Python, or Java, Experience with developer portals and service catalogs, Understanding of cloud-native architectures and automation principles, Polish language proficiency, English C1+ proficiency 📃 Skills: Kubernetes, Docker, Terraform, CI/CD, GitOps, Helm, ArgoCD, Go, Python, Java, Backstage, OpenTelemetry, Prometheus, Grafana, AWS, Azure, GCP 🏢 Description: Role Overview We are looking for a Platform Engineer to help build and operate an Internal Developer Platform (IDP) that empowers engineering and scientific teams through self-service capabilities, infrastructure abstraction, and deployment automation. In this role, you will be responsible for creating a scalable and developer-friendly platform that simplifies software delivery, standardizes engineering practices, and accelerates application development across the organization. You will work closely with development teams to improve developer experience, streamline onboarding, and provide reusable tools, templates, and deployment patterns. Key Responsibilities Design, develop, and maintain core Internal Developer Platform components, including developer portals, service catalogs, and service templates. Build and manage CI/CD pipelines, GitOps workflows, and deployment automation using Kubernetes, Helm, and ArgoCD. Develop and maintain reusable SDKs, templates, and “golden paths” that enable teams to rapidly deploy and operate services. Integrate observability, monitoring, and distributed tracing capabilities into platform services using tools such as OpenTelemetry, Prometheus, and Grafana. Partner with engineering teams to onboard applications and continuously improve the developer experience. Drive platform standardization, automation, and best practices across the software development lifecycle. Contribute to the evolution of cloud-native infrastructure and self-service engineering capabilities. Requirements 3–7+ years of experience in Platform Engineering, DevOps, Site Reliability Engineering, or Software Engineering. Strong hands-on experience with Kubernetes, Docker, and containerized environments. Solid knowledge of Infrastructure as Code, particularly Terraform. Experience building and maintaining CI/CD pipelines and GitOps-based deployment processes. Programming experience in Go, Python, or Java. Experience with developer portals, service catalogs, and self-service engineering platforms. Strong understanding of cloud-native architectures, automation, scalability, and reliability principles. Able to speak Polish and Engilsh C1+ Nice to Have Experience with Backstage or similar Internal Developer Platform solutions. Knowledge of observability and monitoring tools such as OpenTelemetry, Prometheus, and Grafana. Experience working with public cloud platforms (AWS, Azure, or GCP). Experience supporting large-scale engineering organizations and improving developer productivity.

🏢 Summary: The offer is for a Senior Platform Engineer responsible for designing, building, and operating a scalable internal developer platform on AWS, combining DevOps and development expertise. The role focuses on Infrastructure as Code, multi-account cloud governance, CI/CD automation, container platforms, and secure networking. The engineer will enable distributed teams through self-service tools, platform standards, and reliable production operations. 🗂️ Requirements: 4+ years experience as Platform Engineer or DevOps Engineer, Hands-on experience with AWS multi-account environments, Strong expertise in Terraform (modules, state management, guardrails), Experience operating EKS and/or ECS in production, Experience with CI/CD and GitHub-based workflows, Knowledge of OIDC and least-privilege deployment patterns, Understanding of IAM, SCPs, permissions boundaries, Experience with cloud security and secure networking, Experience with monitoring, logging, alerting, incident handling, Professional development experience in Java, Kotlin, Node.js or TypeScript, Ability to work with container-based workloads 📃 Skills: AWS, Terraform, EKS, ECS, CI/CD, GitHub, OIDC, IAM, SCP, VPC, TGW, Route53, SSO, CDK, Java, Kotlin, Spring, Node.js, TypeScript, Docker, Kubernetes 🏢 Description: Job Purpose We are looking for a Senior Platform Engineer with strong DevOps experience , combining deep operational expertise with a development background. You are comfortable working at the intersection of infrastructure, security, and application development, and you enjoy enabling other teams to move faster through well-designed platforms and abstractions. You bring both a builder and operator mindset: you design scalable systems, automate everything possible, and take ownership of platform reliability in production. We offer B2B Contract (remote) or Offer of Employment/Umowa o prace (4 days mandatory working from our office in Kraków) - details to be discussed with your recruiter. Key Responsibilities Build and maintain core platform components (SSO, Access Management, clusters, networking, CI/CD, observability). Own Terraform modules, baseline configurations, and guardrails for distributed teams. Design and evolve platform “golden paths” — secure defaults, templates, and standards. Maintain platform IaC (Terraform, modules, state design, multi-account governance). Integrate with team-owned CDK stacks through stable platform contracts. Lead evolution of platform abstraction layers and service catalogs. Design and manage multi-account AWS landing zone (Orgs, SCPs, permissions boundaries). Own developer onboarding patterns (IAM SSO access, automation, pipelines). Build safe cross-account deployment workflows (GitHub OIDC, least privilege). Design and operate ECS and EKS clusters used by hundreds of services. Establish best practices for container execution, networking, autoscaling Manage central networking components (VPC, TGW, Route53). Ensure secure east–west communication between workloads in different accounts. Provide self-service tools and templates for teams (pipelines, service definitions, actions). Abstract platform complexity to enable fast and safe deployments for all teams. Own documentation, workshops, patterns, and architectural guidance. Operate and evolve platform-wide logging, metrics, and tracing systems. Ensure operational standards for platform components. You are meant for this job if: Strong experience as a Platform Engineer / DevOps Engineer operating production systems at scale Proven +4 years hands-on expertise with AWS , especially multi-account environments and organizational governance Deep understanding of Infrastructure as Code , particularly Terraform (modules, state management, guardrails) Solid experience running and operating EKS and/or ECS in production Strong background in CI/CD , GitHub-based workflows, and secure deployment patterns (OIDC, least privilege) Experience designing developer platforms and internal tooling for self-service and standardization Strong understanding of cloud security , IAM, SCPs, permissions boundaries, and secure networking Operational excellence mindset: monitoring, logging, alerting, SLOs, and incident handling In addition to infrastructure and operations, you have hands-on development experience , allowing you to collaborate closely with application teams and design pragmatic platform contracts: Professional experience developing services in one or more of: Java / Kotlin (Spring Boot) Node.js / TypeScript Familiarity with modern API design, service runtime concerns, and container-based workloads Ability to read, debug, and contribute to application code when needed