Senior AWS Infrastructure Engineer

At  Synechron , we harness the power of digital transformation to drive business success. As a global consulting firm, we combine creativity with advanced technology to deliver innovative solutions across industries. Recognized with multiple employer awards, we are committed to building strong expert teams and a collaborative, high-impact work environment.     We are hiring a Senior AWS Infrastructure Engineer Hybrid working model – Novi Sad or Belgrade      Role Description    We are looking for an experienced Senior AWS Infrastructure Engineer to design, implement, operate, and continuously improve enterprise-grade AWS infrastructure and Kubernetes environments.This is a role with a strong focus on AWS EKS platform operations, production reliability, infrastructure automation, observability, networking, and security. You will work directly with existing cloud platforms, take ownership of technical discovery and implementation, and help ensure that business-critical workloads remain scalable, secure, resilient, and highly available.The ideal candidate brings extensive hands-on experience across AWS infrastructure, production Kubernetes operations, Site Reliability Engineering, infrastructure as code, GitOps, observability, and live-system troubleshooting. You should be comfortable working autonomously, quickly understanding an existing platform, and independently resolving complex infrastructure and production challenges.   Key Responsibilities:    Design and maintain enterprise-grade, multi-tenant AWS cloud architectures, with a strong focus on high availability, disaster recovery, scalability, security, and operational efficiency. Perform hands-on technical discovery, capacity planning, performance profiling, architectural scoping, and production optimization. Manage Day 2 operations for AWS EKS, including zero-downtime cluster upgrades, managed node group rollouts, platform maintenance, and reliability improvements. Perform active troubleshooting of degraded or failing Kubernetes workloads and restore service health in production environments. Maintain reliable and scalable Kubernetes platforms supporting business-critical applications. Configure and optimize Karpenter-based autoscaling to support workload scalability and efficient resource utilization. Design, implement, and maintain multi-account and multi-environment AWS architectures using Hub-and-Spoke VPC models and AWS Transit Gateway. Implement and maintain network and platform security controls, including AWS Network Firewall, AWS WAF, VPN solutions, IAM policies, and centralized security configurations. Manage Kubernetes cluster networking and security using Cilium, including CNI configuration and network policies. Support ingress architectures and service mesh configurations within Kubernetes environments. Optimize AWS compute and storage resources, including EKS worker nodes, EC2 instances, and high-performance EBS volumes for disk-intensive workloads. …