Samuel B. - DevOps Developer / Architect

Q: What languages does Samuel speak?

Samuel speaks the following languages: Slovak (Native), Czech (Advanced), German (Advanced), English (Advanced) .

Q: How many years of experience does Samuel have?

Samuel has at least 27 years of experience. During this time, Samuel has worked in at least 17 different roles . The average length of individual experience is 1 year and 5 months . Note that Samuel may not have shared all experience and actually has more experience.

Q: What is Samuel's latest experience?

Samuel's most recent position is DevOps Developer / Architect .

Q: Which industries is Samuel most experienced in?

Samuel is most experienced in industries like Information Technology , Real Estate , and Healthcare . Samuel also has some experience in Professional Services , Tourism , and Telecommunication .

Q: Which business areas is Samuel most experienced in?

Samuel is most experienced in business areas like Information Technology , Product Development , and Business Intelligence . Samuel also has some experience in Research and Development , Operations , and Quality Assurance .

Q: Which industries has Samuel worked in recently?

Samuel has recently worked in industries like Information Technology , Real Estate , and Healthcare .

Q: Which business areas has Samuel worked in recently?

Samuel has recently worked in business areas like Information Technology , Product Development , and Business Intelligence .

Recommended expert

Slovakia

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Experience

Jan 2026 - Dec 2026

1 year

DevOps Developer / Architect

Architected and deployed a high-availability Proxmox cluster leveraging Ceph and ZFS for resilient, software-defined storage.
Engineered a custom SDN layer using VXLAN and ovs-vm-arbiter to streamline cross-node network traffic.
Optimized traffic management using HAProxy for L7 routing and IPVS for high-performance L3 load balancing.
Built a unified observability stack integrating CheckMK, SigNoz, and Prometheus/OTEL for full-stack monitoring and alerting.
Standardized infrastructure lifecycle management by automating all deployments and configurations via Ansible.
Managed enterprise Windows Server 2022 environments, including RDP optimization and RDP Gateway configuration.
Streamlined internal application delivery (OpenWebUI, LiteLLM, Coolify) to ensure rapid deployment and environment parity.

Jan 2025 - Dec 2026

2 years

Senior Perl Developer

Developed and deployed new feature sets for the ISP server control panel, enhancing server management capabilities and end-user experience.
Modernized infrastructure operations by migrating the ticketing system from OTRS to Zendesk.
Designed new modular REST API to enable Infrastructure-as-Code (IaC) integration, including the development of sample Terraform modules.
Drove the adoption of CI/CD practices by introducing automated testing and deployment pipelines to increase release stability.
Maintained and optimized legacy systems, including proprietary CRM and domain registration automation services.

Jan 2024 - Dec 2026

3 years

Technical Co-Founder / DevOps Engineer

Engineered MLS-to-PostgreSQL sync using RESO/RETS protocols.
Automated database schema generation via custom PL/PgSQL procedures.
Built low-latency REST APIs with SOLR with auto-generated OpenAPI specs.
Developed a custom low-code Appsmith dashboard for streamlined API configuration.
Managed automated data workflows and task scheduling.
Integrated AI-powered search using OpenWebUI and custom prompt tuning and MCP servers.
Implemented system monitoring and request accounting with Prometheus and InfluxDB.

Jan 2024 - Dec 2024

1 year

Interim Senior Developer / DevOps Engineer

Improved request accounting system for IONOS CDN.
Implemented CDN metrics exporter for Prometheus.
Optimized performance of OpenResty LUA modules.
Developed OpenResty module for SSO against LDAP.
Implemented and maintained Puppet modules.
Extended Icinga monitoring checks.
Upgraded and optimized geospatial Python report for DDOS mitigation.

Jan 2022 - Dec 2023

2 years

Perl Developer

Maintained Perl backend application, performed bug fixing, and developed new features.
Tuned Elasticsearch queries.
Implemented bindings to external systems (Emarsys, SOAP, Elasticsearch).
Migrated APIs to external systems (Amazon Cart, PayPal).
Developed BI reporting scripts with Supabase and Redash.
Maintained OTRS.

Jan 2021 - Dec 2022

2 years

Database Developer / Technical Support

Provided technical support by implementing MariaDB connector for a custom ETL processor.

Jan 2020 - Present

6 years 6 months

Part-time Consultant / CTO / DevOps / Developer

Provided technical consultations on R&D project for improving dental patients medical data management on basis of Nextcloud.
Integrated a basic user LLM-based after-surgical treatment self-diagnosis tool using IBM Watson and various LLMs including ChatGPT, Mistral.AI, and PrivateGPT.
Integrated various open source tools to create complex patient data treatment management platform (Nextcloud, Rocketchat).
Implemented Single Sign-On (SSO, SAML) with Authentik.
Deployed complete solution to isolated environments in hospital and fleet deployment on private AI-enabled devices.
Deployed OpenWebUI and LiteLLM, including tuning and billing implementation.
Conducted analysis and preparations for MDR certification.

Jan 2020 - Dec 2023

4 years

DevOps Engineer

Migrated and upgraded existing Perl scripts.
Performed CentOS system migration and upgrade.
Re-migrated systems from CentOS to RHEL.
Containerized XAdmin tool with Docker and handled migration.

Jan 2020 - Dec 2023

4 years

DevOps Engineer / PHP Developer

Customized and deployed Kong API Gateway.
Deployed Kong GUI (Konga).
Implemented API access control and rate limiting using Kong API Gateway.
Developed and customized Kong plugins in Lua.
Created custom scripts for synchronizing Kong configuration from test to production.
Containerized backend system built on PHP/Voyager and deployed to OpenShift/Kubernetes with auto-scaling.
Implemented per-consumer request accounting and monitoring via Prometheus.
Developed image optimization service for SEO improvement.
Established application performance monitoring with Prometheus.

Jan 2019 - Present

7 years 6 months

Technical Leader

Created proof of concept of continuous cloud asset inventory system.
Synchronized collected data with iTop CMDB (ITIL compatible).
Implemented customer dashboard using Dash/Plotly.

Jan 2019 - Dec 2023

5 years

Monitoring Architect / CMDB Asset Management / DevOps

Designed and implemented multi-tenant monitoring and alerting system for NOC team managing over 4,000 machines and routers.
Automated migration of existing services to AWS using Terraform and Ansible.
Introduced and configured iTop CMDB.
Synchronized cloud assets into CMDB from AWS, vCloud, vSphere, Proxmox.
Discovered physical assets automatically (routers, POS).
Built HA Prometheus-based monitoring and alerting system on top of CMDB, with multiple federated satellites and TimescaleDB as long-term storage.
Centralized log collection and storage with Loki for syslog and application logs.
Implemented SNMP monitoring for Cisco, Mikrotik, Fortinet devices.
Created monitoring dashboards in Grafana for Prometheus, Loki, SQL.
Developed BI reporting system from CMDB data (resource usage, planning, IPAM).
Migrated multiple VMware nodes to distributed Proxmox/Ceph virtualization on existing SAN storage.

Jan 2019 - Dec 2019

1 year

Monitoring Architect / DevOps

Designed and implemented payment processing monitoring and alerting system with detailed statistics on database cache/index usage, query effectiveness, and Kubernetes allocation.
Set up HA Prometheus-based monitoring and alerting.
Prepared Grafana dashboards with detailed statistics for developers.
Automated all parts of monitoring using Ansible for reproducible setup and integration into existing playbooks.

Jan 2018 - Present

8 years 6 months

Backend Search Architect / Developer / DevOps

Analyzed existing search backend in Java and reimplemented it using OpenResty with SOLR cluster.
Implemented autocomplete API for term type–aware search.
Built complete ETL pipeline for downloading MLS data using RETS and RESO API.
Set up monitoring and dashboards with Prometheus and Grafana.
Containerized Angular and Node.js backend applications.
Configured GitLab CI/CD pipelines.
Automated deployments using Ansible.

Jan 2018 - Dec 2019

2 years

Backend Architecture Design / Database Architect / Consultant

Analyzed existing microservices architecture.
Improved payment processing flow optimized for high availability and scalability.
Introduced tamper prevention and auditing features via HSM.
Optimized existing SQL queries and database structures, achieving 4–6x speedup in payment processing.

Apr 2017 - May 2018

1 year 2 months

Developer

Maintained hundreds of legacy DWH/ETL Perl scripts for ClickView reports.
Reimplemented existing scripts into a new specialized ETL framework focused on speed and simplicity.
Created a simple reporting engine for sending text, HTML, CSV, XLSX reports.
Developed an alarm framework for monitoring differences between DWH and production databases.
Implemented additional automation tools including Jenkins auto-scheduling.

Jan 2015 - Dec 2017

3 years

Developer

Developed intranet security tool for managing infrastructure access permissions (backend and frontend).

Jan 2010 - Dec 2015

6 years

Developer

Developed HA parallel lottery system in C.
Designed and implemented automation tools for rolling upgrades, system action automation, and blackbox/performance testing using C, Perl, and Shell.
Created Perl and Shell scripts for management, configuration, and active monitoring.
Provided partial on-site support and defect resolution for German lotteries.
Developed custom SQLite extensions.

Jan 2008 - Present

18 years 6 months

Owner / Full Stack Developer

Evolved over time from simple RSS aggregator to fulltext powered search engine, collecting jobs from multiple job boards on Slovak internet.
Developed XSLT-based web scraper, able to scrape HTML, JS, JSON, CSV, PDF and other types of data sources.
Designed databases and optimized queries.
Implemented various SOLR modules in Java.
Performed continuous SOLR search tuning and other improvements.
Generated AI-powered job market reports with trends analysis.
Conducted AI job data extraction and metadata enrichment.

Jan 1999 - Present

27 years 6 months

Full Stack Developer

Designed and developed various open source projects including:
log-malloc2 (memory allocation tracking library in C)
ansible-tinc (tinc VPN configuration/deployment playbook)
eldap (SASL authentication module in C)
passwd_exp (password expiration email notifier in Perl)
solr-pager (SOLR indexing engine plugin in Java)
Test::Tokenizer (flex-based lexical analyzer for Perl in C)
url-include (WordPress plugin)

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Real Estate, Healthcare, Professional Services, Tourism, and Telecommunication.

Information Technology

Real Estate

Healthcare

Professional Services

Tourism

Telecommunication

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Business Intelligence, Research and Development, Operations, and Quality Assurance.

Information Technology

Product Development

Business Intelligence

Research and Development

Operations

Quality Assurance

Summary

Developer & Technical Lead with over 20 years of experience architecting high-traffic distributed systems. Expert in bridging the gap between low-level systems programming (C/Perl) and modern application development (Python/PHP/Lua and other).

DevOps & Infrastructure Architect Senior DevOps Architect specializing in high-availability infrastructure and virtualization. Expert in orchestrating complex environments using Proxmox, Ceph and OpenShift, with a focus on automated CI/CD pipelines and infrastructure-as-code.

Monitoring & Observability Expert Specialist with deep expertise in system telemetry and proactive performance tuning. Architect of resilient monitoring frameworks to ensure maximum uptime for large-scale distributed platforms.

Search System & RAG Specialist Specialized Search Architect with extensive experience in designing and scaling enterprise search solutions including SOLR and OpenSearch. Expert in engineering complex ETL pipelines and modernizing information retrieval systems.

Technical Recovery & AI-Driven Refactoring Specialist Technical Recovery Specialist focused on stabilizing 'vibe-coded' and rapidly prototyped LLM-driven applications. Expert at refactoring unstable, AI-generated codebases into high-performance, maintainable production systems. Skilled in bridging the gap between 'proof-of-concept' AI wrappers and scalable, secure enterprise architecture by implementing robust testing, modular design, and industry-standard CI/CD practices.

Skills

Languages: Perl, Lua, C/C++, Php, Python, Java, Go, Typescript/Node.Js
Search & Data: Solr, Opensearch, Typesense, Elasticsearch, Postgresql/Pl/Pgsql, Timescaledb, Etl/Xslt
Infrastructure & Devops: Proxmox (Cluster/Ceph), Ansible, Terraform, Docker/Podman, Kubernetes/Openshift, Vxlan/Sdn
Monitoring & Observability: Prometheus, Grafana, Signoz, Netdata, Checkmk, Loki, Influxdb, Icinga2, Opentelemetry
Cloud & Api Architecture: Gateway (Kong), Cdn, Microservices, Ha/Load Balancing (Haproxy/Ipvs), Cmdb (Itop), Sso/Saml
Ai & Llm Integration: Openwebui, Litellm, Ollama, Rag Pipeline Tuning, Ai-Driven Data Extraction
Leadership & Management: Technical Strategy & Technical Product Owner, R&D Leadership, Stakeholder Management, Project Lifecycle Management (Sdlc), Technical Due Diligence & Mentoring

Languages

Slovak

Native

Czech

Advanced

German

Advanced

English

Advanced

Statistics

Experience

Total positions 19

Experience in Information Technology 27.5 y

Avg length 5 y 5 m

Longest experience 27 y 5 m

Expertise

Recent roles DevOps Developer / Architect, Senior Perl Developer, Technical Co-Founder / DevOps Engineer

Main industries Information Technology, Real Estate, Healthcare

Main business areas Information Technology, Product Development, Business Intelligence

Profile

Created

June 2026

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Frequently asked questions

Have questions? Find more information here.

What languages does Samuel speak?

Samuel speaks the following languages: Slovak (Native), Czech (Advanced), German (Advanced), English (Advanced).

How many years of experience does Samuel have?

Samuel has at least 27 years of experience. During this time, Samuel has worked in at least 17 different roles. The average length of individual experience is 1 year and 5 months. Note that Samuel may not have shared all experience and actually has more experience.

What roles would Samuel be best suited for?

Based on recent experience, Samuel would be well-suited for roles such as: DevOps Developer / Architect, Senior Perl Developer, Technical Co-Founder / DevOps Engineer.

What is Samuel's latest experience?

Samuel's most recent position is DevOps Developer / Architect.

Which industries is Samuel most experienced in?

Samuel is most experienced in industries like Information Technology, Real Estate, and Healthcare. Samuel also has some experience in Professional Services, Tourism, and Telecommunication.

Which business areas is Samuel most experienced in?

Samuel is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Samuel also has some experience in Research and Development, Operations, and Quality Assurance.

Which industries has Samuel worked in recently?

Samuel has recently worked in industries like Information Technology, Real Estate, and Healthcare.

Which business areas has Samuel worked in recently?

Samuel has recently worked in business areas like Information Technology, Product Development, and Business Intelligence.

What is the availability of Samuel?

Samuel is immediately available part-time for suitable projects.

What is the rate of Samuel?

Samuel's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.