Curriculum Vitae

Stefan Mantel

Stefan Mantel
Stefan Mantel
IT Solution Architect


native language
QR Code VCard Stefan Mantel

Main Skills

Container & Virtualisation Platforms

OpenShift 4, Kubernetes, Docker Swarm

Cloud Providers

Azure, AWS, Digital Ocean

Programming Languages

GoLang, Javascript, Node.js, React, PHP


Gitlab, Jenkins, Sonarqube, Artifactory, VictoriaMetrics, Keycloak, Ansible, Hashicorp Vault, Nginx

Operating & SAN/Storage Systems

different Linux distributions, MacOS

People Management:

Team lead, people, and organisation development

Professional Experience

IT Solution Architect

03.2021 - Present

Pushing forward the 4Data Cloud Services including designing and developing its functionalities.

Head of DevOps Platform

04.2020 - 11.2020

Leading a team with six direct reports, developing them and the organization towards a DevOps / Agile way of working mindset. Representing the team in various boards (e.g., Technical Architecture -, Change Approval - and Design Board). Acting as a Product Owner and Scrum Master within the team.

Responsible for the new, to be built, OpenShift Platform as well as maintaining the existing Docker Swarm Cluster and migration of existing MicroServices (approx. 60 services). Created the cluster infrastructure architecture as well as the authentication and authorisation concept and how access should be limited for the different namespaces.

Responsible for maintaining the Docker Swarm platform including maintenance against a zero-downtime policy. Reporting cluster usage for costs cross-charging based on used resources.

Leading an interdisciplinary team of engineers (from Release Management, API Management, DevOps Platform, and IT Security) as a DevOps guild as well as the infrastructure team within the Digital Platform Transformation program. Also led several proofs of concepts for new services within the OpenShift platform (Hashicorp Vault, Conjur, Gitlab, Jenkins, Airlock WAF & Ping).

IT Solution Architect

09.2019 - 03.2020

Tech Lead for all swiss based customers helping them to leverage the ndgit API Management Platform according to their needs. Supporting EU customers to be compliant with the PSD2 regulations with the ndgit PSD2 platform.

Provided several ndgit API Management Platforms (as SaaS and on- prem) to various customers (including swiss banks).

Product Owner of the eBills and International Payments API.

Representing the company in various groups: Swiss Fintech Innovations,, F10 Fintech Incubator & Accelerator, etc.

API Manager

06.2018 - 08.2019

Designing and building the new Tyk API Management platform to protect MicroServices from unauthenticated and unauthorized access from within and outside the company.

Evaluated several API Management Platforms (MuleSoft, Apigee, WSO2, 2scale, ndgit and Tyk) as base for a build or buy decision.

Defined the overall security concept for APIs / MicroServices and created guidelines on how the concept should be applied.

Helped the PSD2 / OpenBanking project as subject matter expert for security topics and kept the end-2-end overview across all components.

Service Manager Online Banking

10.2016 - 05.2018

Responsible for all development and testing environments of the Online Banking Application. Ensuring the correct releases are deployed on the right environment at the right point in time together with the correct set of data.

Subject matter expert for Online Banking Security topics as well as for PSD2 / OpenBanking including organisation of penetration tests and managing the findings and management of used TLS certificates.

Incident and problem management for hight and critical issues, Managing the vendor to ensure right priorities for new features vs. bug fixes. Managing expectations for internal and external partners. Ensuring bug fixing is being done within the agreed SLAs.

IT Support / IT Business Analyst

04.2011 - 09.2016

Working on several projects in various positions mainly with focus on Online Banking and Security related topics

First Level Support for all kind of IT related issues

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