GitLab Experts in Zurich

Mohamad K.

Senior Backend Developer

Last position:

Senior Backend Developer at Standing on Giants

Led architecture and end-to-end engineering delivery for community-driven SaaS platforms serving 2M+ monthly active users.
Architected and led the migration of a monolithic Python/FastAPI and PostgreSQL database and LangChain with codebase to an event-driven microservices architecture on AWS EKS, sustaining 10x traffic growth from ~150 RPS to 1,500+ RPS with zero re-architecture cycles.
Defined and enforced engineering standards across services including API contracts, observability baselines, and deployment topology, reducing production incidents by 55% and MTTR from 2 hours to under 25 minutes within 9 months.
Redesigned the caching and query layer using multi-tier Redis caching and database indexing/partitioning, cutting p95 API latency from 850ms to 180ms (78% reduction) and database CPU load by 45%.
Built CI/CD platform on GitHub Actions, Terraform, and Kubernetes (EKS) with blue-green and canary rollouts, increasing deployment frequency from ~2/month to 8-12/day and reducing lead time from 10 days to under 6 hours.
Implemented contract testing, automated load testing, and observability SLOs using Prometheus, Grafana, and OpenTelemetry, raising platform availability from 99.5% to 99.95% (10x reduction in error budget burn).
Led and grew a cross-functional team of 8 engineers across backend, frontend, and DevOps, scaling headcount from 4 to 8 with 85% retention; owned hiring, onboarding, performance reviews, and career development.
Partnered with Product, Design, and Client Success leadership as primary technical decision-maker; translated business goals into technical roadmaps and drove build-vs-buy decisions on authentication, search, and AI tooling.
Introduced AI-assisted development workflows including automated code review and a RAG-based internal knowledge assistant using Graph (GraphRAG, Neo4J), increasing sprint throughput by 30% across two quarters.
Owned incident command and production support rotation; established runbooks, postmortem culture, and on-call SLOs, reducing weekend paging incidents by 70%.
Developed and optimized Algorithms using python libraries like Numpy and Pandas.

Christoph P.

ICT DevSecOps Engineer & Security Coordinator

Zug

Last position:

ICT DevSecOps Engineer & Security Coordinator at Abraxas Informatik AG

Interface role with the SOC team; improved incident response time by 45% through structured escalation processes and proactive security monitoring.
Defined technical standards for a multi-tenant enterprise platform (10+ services), resulting in a 30% shorter onboarding time for new clients in the public sector.
Active knowledge transfer and mentoring of a 6-person team; increased team autonomy and established a sustainable engineering culture.
Reduced time to market by 50% by optimizing CI/CD pipelines and establishing self-service deployments.
Stack: GitLab CI/CD, Kubernetes, Nexus, Harbor, ArgoCD, HashiCorp Vault, Grafana, Python, PostgreSQL, Java, Spring Boot, Flyway, Quarkus, JBoss, Loki, Go, Kafka, Kustomize, MongoDB

Robin O.

Co-Founder & AI Solutions Architect

Winterthur

Last position:

Co-Founder & AI Solutions Architect at airdys

Product strategy, architecture, and technical co-direction
AI workshops, client onboarding and go-to-market activities
Design and implementation of AI architectures (LLMs, RAG, MCP, agents, voice, automation)
Hands-on development of prototypes and production-ready AI integrations
Consulting clients on AI adoption, workflows, and integration into existing infrastructure
Collaboration with co-founders on strategic direction
Collaboration in sales and customer acquisition

Tools and Technologies: OpenAI, Anthropic, Azure, Vercel AI SDK, RAG (Retrieval-Augmented Generation), MCP (Model Context Protocol), FastAgent, VAPI, n8n, make.com, LibreChat, PostgreSQL, OpenAPI, Next.js, Vercel, Docker

Gwang Jin K.

Data Scientist / Applied AI, Automation & Data Systems Researcher

Last position:

Data Scientist / Applied AI, Automation & Data Systems Researcher at Independent

Built and explored applied GenAI, RAG, GraphRAG, local LLM, agentic AI and document-intelligence prototypes for structured analysis, evidence extraction, semantic search, technical reasoning and decision-useful reporting
Developed private local-LLM workflows and AI system patterns focused on privacy, reproducibility, reviewability, low-cost inference and practical user control
Built reproducible Python/R workflows for data analysis, automation, API-driven tooling, validation logic, technical documentation and AI-assisted software development
Designed workflows around explicit assumptions, traceable inputs, reviewable outputs and failure-mode awareness rather than black-box “looks good” demonstrations
Supported RAHN AG in a chemical/regulatory environment with data extraction and processing around WERCS, a regulatory application for chemical product and compliance data
Explored complex application/database schemas and wrote nested SQL queries to extract information for mixture calculations, component relationships, regulatory rules and reporting logic
Continued hands-on development in Git/GitHub/GitLab/Bitbucket, Docker/Linux deployment patterns, REST/API workflows, error handling, technical writing and fast AI-assisted prototyping
Built technical writing and documentation workflows that turn complex systems into clear runbooks, checklists, decision notes and user-facing explanations

Venkata R.

DevOps & IT Responsibility

Oberengstringen

Last position:

Continuous Learning at Personal Time Off

ZHAW CAS Secure Software Design and Development
German C1 and Goethe Certificate C1
ETH CAS Cloud and Mobile Computing at ETH Zurich
Linux Foundation Linux System Administration LFS307
Linux Foundation Kubernetes Fundamentals LFS258
Linux Foundation Kubernetes for Application Developers LFD459
Linux Foundation Kubernetes Security Fundamentals LFS460

Ahmed R.

AI & Automation Engineer

Küsnacht

Last position:

AI & Automation Engineer at Teosek GmbH

Build prototypes, expand AI skills, and practical application in a startup context.
Transition phase: further training in prompt engineering, APIs, AI, working on independent prototype projects, and collaborating at a friend's startup.
Technologies: LangChain, REST, Python, Java, JS, TS, Node.

Ursula M.

Business Mentor

Last position:

Business Mentor at RoleModel Rebels

Mentor female students and professionals in advancing their careers, particularly as aspiring tech entrepreneurs.

Georgios S.

Senior Software Engineer

Last position:

Senior Software Engineer at UBS Bank

Implementations of a code refactoring framework able to refactor thousands of repositories leveraging Generative AI
Use Python (Django, Flask, FastAPI), Java and Typescript in Azure Cloud (Data Lake, VMs, AI) and GitLab infrastructure
Mentoring and pair programming
Obtained Azure AI-900 and AI-102 certifications

Beat Z.

SAP Test Manager

Last position:

SAP Test Manager at E.ON Grid Solutions GmbH

Responsible for IT integration test and user acceptance test for SAP S/4 Hana and BDO BO Customer Financials Management
Led the test team (business testers and IT testers)
Resource planning and control within the test team
Created test concepts and test plans
Performed test risk analysis
Coordinated test execution and defect tracking
Ensured test progress
Generated and visualized reports
Summarized test reports and reported to management
Prepared and conducted user acceptance tests
Managed SIGMA and JIRA/Confluence at project level

Milica M.

Full-Stack Developer

Last position:

Full-Stack Developer at Holycode

Contribute to a cross-functional team building a cloud-based bookkeeping platform for SMEs
Design and implement Java Spring Boot microservices with clear separation of concerns
Integrate core services via REST and gRPC APIs
Implement event-driven workflows using RabbitMQ for reliable, decoupled messaging
Model and manage transactional data in PostgreSQL and leverage Redis for caching

Udo W.

Performance Improvements

Zurich

Last position:

Julius Bär

Application ownership and further development of test user management (TUM)

Areas of responsibility: Application ownership (Application Ownership / ITSO), application management, incident management, deployment / release management, requirements management, prioritization, further development, automation, and interface management

Technologies: SQL Server, Python, GitLab, UC4, Lieberman, Linux

Responsible for the operation and continuous development of a central application for managing more than 5.000 technical test users and their data.

Gathered and assessed business requirements, independently prioritized further development, and planned and coordinated implementation using agile methods and PI Planning, in close collaboration with the relevant business units and IT teams.

Expanded the central SQL Server database with additional information about test and real users, and integrated further applications through defined interfaces. The modular application used Python-based processing components, with execution and workflows controlled through UC4. This enabled data from different source systems to be automatically transferred, processed, and made available, as well as new test users to be created automatically.

Ensured reliable application operations and continuously optimized and automated existing processes.

Application ownership, modernization, and migration of incident management (TRANT)

Areas of responsibility: Application ownership (Application Ownership / ITSO), application management, incident management, deployment / release management, requirements management, software modernization, migration, interface integration, and quality assurance

Technologies: UC4, Jira, SQL Server, Oracle, Java, Python, Lieberman, Linux, Jai

Responsible for the operation and development of an application that automatically records, processes, and forwards technical incidents in various test environments.

Automated the creation of Jira incident tickets when UC4 workflows were blocked, including routing them to the relevant application managers.

Modernized the application by migrating from Java to Python, moving the database from Microsoft SQL Server to Oracle, and replacing the Jenkins scheduler with UC4.

Integrated the Jira API and used the bank's internal AI solution Jai to support code migration and subsequent validation. Independently and critically reviewed AI-generated results for business and technical accuracy.

Shift lead for operations control in test environments

Areas of responsibility: Monitoring various test systems

Technologies: UC4, TSO, HOST, Azure-Cloud

Responsible for monitoring and controlling automated processing workflows in various test environments, including systems running in the Azure-Cloud.

Monitored UC4 and HOST workflows and analyzed and handled incidents. When processing workflows were blocked, Jira tickets were automatically created through TRANT and assigned to the relevant application owners. In coordination with them, affected jobs were restarted or stopped as needed. HOST processes were also monitored and controlled through OPC.

A multi-shift operation was introduced to ensure stable and as continuous as possible testing.

Test data anonymization manager

Areas of responsibility: Planning/anonymizing/publishing production data for test systems

Technologies: UC4, Informatica (PowerCenter and IDMC)

To ensure test environments could run with real data, production databases were cloned regularly. Production data had to be untraceable in test environments. For this reason, the cloned databases were first anonymized with Informatica PowerCenter and later with Informatica IDMC. Critical tables and columns in the various databases (Oracle, SQL-Server, MongoDB) had to be identified and analyzed at the data level. Rules for handling critical data were agreed with the application owners.

Peter W.