Stefan is available for hire

Stefan Manojlovic

Verified Expert in Engineering

DevOps Engineer and Developer

Belgrade, Serbia

Toptal member since October 7, 2025

Expertise

DNS AWS RDS System Security Docker AWS Terraform Kubernetes DevOps Nginx REST API PostgreSQL AWS Lambda Linux Apache Kafka

Bio

Stefan is a DevOps engineer with four years of experience, primarily in fintech. He specializes in AWS cloud infrastructure and has a strong background in building and maintaining event-driven environments. Stefan's expertise spans infrastructure as code (IaC), CI/CD pipelines, and cloud-native architectures, making him well-versed in delivering reliable systems that support high-demand applications.

Portfolio

Quantlabs DOO

Go, Python, Apache Airflow, Amazon Web Services (AWS), Apache Kafka, Azure...

N26

Go, Amazon Web Services (AWS), Kubernetes, PostgreSQL, Apache Kafka, Terraform...

Experience

Amazon Web Services (AWS) - 4 years
Apache Kafka - 4 years
Kubernetes - 4 years
Linux - 4 years
Ansible - 4 years
PostgreSQL - 3 years
Python - 2 years
Go - 1 year

Preferred Environment

Linux, Amazon Web Services (AWS), Azure, Go, Python, Terraform, PostgreSQL, Apache Kafka, Ansible, Apache Airflow, DevOps, Amazon EKS, Kubernetes

The most amazing...

...project I've worked on involved automating cloud workflows for a leading neobank, enhancing services for millions of users.

Work Experience

DevOps Engineer

2023 - PRESENT

Quantlabs DOO

Managed and optimized both cloud-managed and self-hosted databases, including SQL Server and PostgreSQL (with TimescaleDB), to achieve high availability and superior performance.
Orchestrated containerized applications on Amazon Elastic Kubernetes Service (EKS), ensuring reliable and scalable deployments.
Managed Kafka clusters, ensuring reliable messaging, event streaming, and optimal system performance.
Ensured SOC 2 compliance across cloud-native applications, infrastructure, and processes by implementing rigorous security, availability, and confidentiality controls.

Technologies: Go, Python, Apache Airflow, Amazon Web Services (AWS), Apache Kafka, Azure, PostgreSQL, Kubernetes, Terraform, DevOps, Change Data Capture, FastAPI, Amazon EKS, AWS Lambda, Infrastructure as Code (IaC), CI/CD Pipelines, Amazon EC2, Amazon RDS, Networking, Virtual Private Cloud (VPC), Docker, NGINX, Docker Compose, REST APIs, Transport Layer Security (TLS), Podman, Cloud Infrastructure, Domain DNS Setup, IT Infrastructure, Web Hosting

DevOps Engineer

2022 - 2023

N26

Managed and maintained AWS infrastructure, including EC2 instances, RDS, S3, Lambda, and IAM.
Containerized applications using Docker and managed container orchestration using self-managed Kubernetes clusters.
Adopted emerging technologies, including Atlantis, ExternalDNS, and Spot Instances, to streamline workflows, improve scalability, and achieve significant cost reductions.
Collaborated with development teams to design and implement CI/CD pipelines using GitHub Actions and ArgoCD.

Technologies: Go, Amazon Web Services (AWS), Kubernetes, PostgreSQL, Apache Kafka, Terraform, DevOps, Python, Amazon EKS, AWS Lambda, Infrastructure as Code (IaC), CI/CD Pipelines, Amazon EC2, Amazon RDS, Networking, Virtual Private Cloud (VPC), Docker, NGINX, Docker Compose, REST APIs, Transport Layer Security (TLS), Podman, Cloud Infrastructure, Domain DNS Setup, IT Infrastructure, Web Hosting

Experience

Kube-watcher

A Go-based monitoring tool designed for monitoring Kubernetes resources. It continuously tracks the state of all components in the cluster and triggers alerts whenever resources drift into an undesired state. Initially built as an internal solution to enhance reliability and visibility within the company's infrastructure, the tool may be released as open-source software in the future.

Education

2020 - 2024

Associate's Degree in Computer Science

School of Electrical and Computer Engineering, University of Belgrade - Belgrade, Serbia

Skills

Libraries/APIs

REST APIs, React, Node.js

Tools

Terraform, Amazon EKS, NGINX, Docker Compose, Ansible, Apache Airflow, Git, Kubernetes Operators

Paradigms

DevOps

Platforms

Amazon Web Services (AWS), Kubernetes, AWS Lambda, Amazon EC2, Docker, Linux, Apache Kafka, Azure

Storage

PostgreSQL

Languages

Go, Python

Other

Infrastructure as Code (IaC), CI/CD Pipelines, Amazon RDS, Networking, Virtual Private Cloud (VPC), Transport Layer Security (TLS), Podman, Cloud Infrastructure, Domain DNS Setup, IT Infrastructure, Web Hosting, Change Data Capture, FastAPI, Computer Networking, Prometheus, Monitoring

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