EXPLORAR

4,9

(93 comentarios)

Iosif P.

@iosifpeterfi

4,9

7,4

95%

Systems Architect, Software Engineer, Developer

$64 USD / hora

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Germany (1:32 a. m.)

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Se unió el noviembre 14, 2006

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7 Recomendaciones

$64 USD / hora

・

Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are effortless. Strengths: Infrastructure architecture & operations (Linux/Windows, virtualization, networking) Security hardening, identity & access, monitoring/observability Automation & DevOps practices (CI/CD, config management, IaC) Migrations and upgrades with minimal downtime Concise runbooks, risk-aware planning, and stakeholder-friendly communication Certifications: CompTIA Security+, Microsoft MCSE/MCSA/MCITP Languages: English (C2), German (C1), native Romanian Location: Germany • NDA-friendly • Reliable and responsive

Verificaciones

A tiempo

94 %

Dentro del presupuesto

99 %

Aceptar tarifa

85 %

Tasa de recontratación

32 %

Ver todo Linux Developers en Germany

Portafolio

SchnellNode EU hosting: site + ops

Role: Senior Systems Engineer
Summary: Planned and operated a highly available Cisco/VMware/Windows stack: UCS/Nexus/ASA, ESXi, AD/Exchange/SCCM, NetApp, Veeam, VDI (VMware Horizon). Implemented patching, backup, and access controls for mission-critical services.
Outcomes: Reduced downtime during maintenance windows; faster VDI login and app delivery; hardened perimeter and email security; documented SOPs for audits.
Tech: Cisco UCS/Nexus/ASA, ESXi, AD/Exchange/SCCM, NetApp, Veeam/BackupExec, Horizon VDI, PowerShell.
Skills/Tags: Enterprise Windows, Networking, Virtualization, Backups/DR, Compliance.
Visuals: High-level network diagram (redacted), VDI/service dashboards

Datacenter Modernization

Role: Product & Delivery Lead / CEO
Summary: Owned roadmap and execution for a privacy-first, blockchain-integrated cloud. Prioritized features from user research, aligned stakeholders, and guided engineering on secure architecture and go-to-market.
Outcomes: Shipped core platform milestones on time; defined KPIs; reduced delivery risk via staged releases and clear acceptance criteria; investor/customer communications.
Tech: Product tooling, backlog systems, go-to-market assets; oversight of infra and chain components.
Skills/Tags: Product Strategy, Stakeholder Mgmt, Risk, Roadmapping, Security-by-Design.
Visuals: Product timeline, feature overview, KPI snapshot (sanitized).

Ethernity CLOUD - DeCC

Role: Blockchain Infrastructure Engineer
Summary: Operated production validators and public RPC endpoints for the bloxberg research network. Implemented monitoring, secure key management, network policies, and upgrade playbooks; maintained block explorer and faucet services.
Outcomes: Stable consensus participation; improved node sync times; zero key exposure incidents; documented blue/green upgrade workflow.
Tech: Linux, systemd, reverse proxies, monitoring/alerting, snapshot/backup tooling.
Skills/Tags: Blockchain Ops, Node Security, Observability, SRE Practices, Upgrade Automation.
Visuals: Explorer dashboard (redacted), validator metrics (sanitized).

bloxberg — Research Blockchain

Role: Systems Architect / Science Systems Administrator
Summary: Designed, operated, and evolved a clustered VMware/Windows/Linux environment supporting research services (AD/PKI, SQL, collaboration, MDM). Ran MPDL’s blockchain infrastructure (validators, RPC, explorer, faucet) with hardened security and documented procedures.
Outcomes: ≥99.9% service uptime; patching and backup SLAs formalized; faster incident resolution (minutes vs. hours); reproducible chain upgrades with rollback plans.
Tech: VMware ESXi/vCenter, Windows Server/AD CS, Linux, SQL Server, Workspace ONE, Seafile, Bash/PowerShell, CI scripts.

Max Planck Digital Library (MPDL

SchnellNode EU hosting: site + ops

Datacenter Modernization

Ethernity CLOUD - DeCC

bloxberg — Research Blockchain

Max Planck Digital Library (MPDL

4.9 · 93 Comentarios

93 Comentarios

Full-Stack Integration Binance & Claude Web-App

Die Zusammenarbeit mit Iosif war sehr professionell und angenehm. Er hat sich schnell in unser technisch anspruchsvolles KI-Projekt eingearbeitet und alle Aufgaben zuverlässig umgesetzt. Besonders hervorzuheben sind seine schnelle Reaktionszeit, die klare Kommunikation und die hohe Qualität der Arbeit. Feedback wurde stets zügig umgesetzt. Wir sind sehr zufrieden und freuen uns auf die weitere Zusammenarbeit.

Full Stack Development

+5 más

Bestball / Worstball App Erweiterung

Absolutely Professional ?

Software Architecture

+1 más

Digitales Ryder-Cup-Leaderboard für Golf-Event

Iosif is highly professional and a pleasure to work with. Communication was excellent throughout the project, and he was always responsive and open to feedback. He quickly understood the requirements and delivered high-quality work with great attention to detail. I am extremely satisfied with the result and would gladly work with him again. Highly recommended!

Data Processing

Data Entry

Mobile App Development

Excel

Excel VBA

+2 más