# Eduardo Hernacki (@runlevel0.me)

Profile: https://sifa.id/p/runlevel0.me
Headline: Senior/Principal Software & Cloud Engineer | SaaS · AWS · Rust · Elixir · TypeScript
Location: Munich, Bavaria, Germany

## About

I'm a Senior/Principal Engineer with more than 10 years of experience designing and building SaaS Products, Distributed Systems, and Cloud-Native Architectures. My work combines hands-on Software Development (Elixir, Rust, TypeScript, Python) with AWS Expertise, DevOps Practices, and Technical Leadership.

I focus on creating systems that endure: architectures that are technically sound, stable in operation, and aligned with business priorities. I bridge product vision with engineering execution, helping teams deliver reliably while supporting executives in making technology decisions that scale sustainably.

Over the years, I have led Modernization Projects, designed Event-Driven systems, enabled Teams through Mentoring and Workshops, and guided Organizations through Cloud Migrations and Compliance Audits. I enjoy working at the intersection of Software Architecture, Cloud Strategy, and Team Enablement, contributing both as an Architect and as a Hands-On Engineer.

Based in Munich, I work with clients across Germany and Europe, in German, English, and Portuguese. I am available for Freelance and Contract Projects – from Architecture Design and Cloud Transformation to Interim Technical Leadership.

## Career

- **Lead AI & Platform Engineer at Squer** (Apr 2026 - Present)
  Full-time · Hybrid
  Agent Platform Architecture & Delivery: Design and implementation of Claude Code agent tooling for a large engineering organisation, operationalised on AWS Bedrock AgentCore, with emphasis on governance, traceability, and compliance.
  
  Spec-Driven Development: Delivery of a pipeline that transforms unstructured notes into versioned specifications with Given/When/Then scenarios, tracker stories with acceptance criteria, and linked branches, ensuring requirements stay reviewable and traceable to implementation.
  
  Multi-Agent Automation: Delivery of a pipeline that turns approved specifications into code changes, composing implementation and verification stages with dedicated subagents, a bounded correction loop, and an unattended mode for CI.
  
  Team Enablement & Adoption: Growth of adoption from zero to approximately 47 active developers across three engineering tribes, backed by a decade of platform engineering in regulated industries and complemented by authorship of the contribution standards that govern the platform, including a design-document-first gate, a consumer override pattern, and component contracts.
- **Senior/Principal Software & Cloud Engineer** (Mar 2024 - Present)
  Freelance · Remote
  Cloud Architecture & Modernization: Design and implementation of AWS-based SaaS solutions (multi-account, serverless, containerized) with emphasis on scalability, resilience, and compliance.
  
  Software Architecture & Development: Delivery of SaaS platforms, backend services, and full-stack applications in TypeScript, Elixir, Rust and Python, ensuring maintainable and testable architectures (DDD, TDD).
  
  Team Enablement & Leadership: Advisory on AWS strategy, DevOps integration, and engineering practices, complemented by team enablement through code reviews, workshops, and mentoring.
  
  Business Alignment: Bridging of product vision with engineering execution through process streamlining and guidance on sustainable technology strategy.
- **Tech Lead (Freelance Contract) at Client from the Software Development Services Industry** (Jan 2026 - Mar 2026)
  Freelance · Remote
  Team Enablement & Leadership: Enhanced team capabilities and delivery maturity; established clear engineering standards, provided architectural guidance, and strengthened stakeholder confidence through consistent delivery.
  
  CI/CD & Quality Engineering: Improved CI/CD pipelines, implemented comprehensive testing (unit, integration, e2e), and introduced BDD specifications bridging Product and Development.
  
  Process & Culture Improvement: Fostered code reviews, pair programming, and knowledge sharing; improved team accountability, resulting in a reliable delivery pipeline and greater transparency and predictability.
  
  Architecture & Delivery: Oversaw end-to-end delivery from requirements analysis through deployment, ensuring scalable and maintainable solutions.
- **Lead Platform Engineer (Freelance Contract) at Client from the Health Services Industry** (Nov 2024 - Aug 2025)
  Freelance · Remote
  Compliance & Resilience: Designed and rolled out a multi-account AWS Backup & Recovery strategy (AWS Backup, Slack integration) with cross-region replication in Europe; implemented software supply-chain security with automated SBOM ingestion (GitHub Actions, Trivy Operator, Dependency-Track) and defined patching workflows for EKS/EC2 workloads.
  
  Event-Driven Architecture: Led on-site workshops for team leads and wrote internal guidelines on event-driven communication patterns, enabling consistent adoption across product teams.
  
  Application & Platform Modernization: Defined the migration strategy from legacy to next-generation EKS clusters; helped rationalize 100+ microservices to balance team autonomy with operational efficiency; streamlined Terraform code to reduce complexity and cost.
- **Cloud Consultant (Freelance Contract, AWS CDK Focus) at Client from the Credit Bureau Industry** (Mar 2024 - Oct 2024)
  Freelance · Remote
  Cloud Modernization: Migrated a SaaS product (Java Spring Boot, React) from Terraform to AWS CDK, making the infrastructure more maintainable and standardized.
  
  Team Enablement: Guided a team of 4 developers to take full ownership of the application lifecycle through CDK best practices, code reviews, and pair programming.
  
  Architecture Advisory: Supported Platform and Product teams with AWS CDK adoption and infrastructure design, strengthening delivery sustainability and productivity.
  
  Application Migration: Improved the maintainability and resiliency of a TypeScript serverless application while extending its functionality during a cross-account migration.
- **Lead Software Engineer at Sema (Germany)** (Aug 2022 - Jan 2024)
  Full-time · Hybrid
  Led a team of 4 Software Engineers in building a new SaaS product for the Timber Construction industry, taking on responsibilities as Architect, Developer, and Scrum Master to ensure steady progress and delivery.
  
  Worked closely with stakeholders and product owners to clarify and prioritize requirements, guiding the team toward pragmatic and high-quality solutions.
  
  Built an event-driven file processing pipeline (S3 Events + Lambda) that automated file handling and streamlined system processing.
  
  Played a key role in the hiring process, actively participating in the selection of technical and leadership roles.
  
  Orchestrated comprehensive pair programming sessions and training programs on AWS, equipping the Engineering team with valuable skills and knowledge.
- **Principal Engineer at Ppro** (Nov 2021 - Jul 2022)
  Full-time · Hybrid
  Supported reviews of Cloud Governance and Compliance in AWS, contributing expertise in security, scalability, and regulatory requirements.
  
  Designed and delivered an AWS Training Program in collaboration with the AWS Technical Customer Manager, used across the engineering organization.
  
  Contributed to the hiring of DevOps/Cloud Engineers and Team Leads, ensuring strong technical and cultural fit.
  
  Advocated for Serverless adoption within engineering teams and represented the approach in cross-team technical discussions.
  
  Implemented a multi-account setup using AWS CDK and developed a robust CI/CD pipeline for efficient and reliable deployment of application changes.
  
  Delivered a Serverless backend (CDK, TypeScript, AWS Lambda) for a UK merchant’s transaction portal.
- **Lead Cloud Consultant at tecRacer Group** (Aug 2019 - Oct 2021)
  Full-time · Hybrid
  Delivered technical and strategic consulting for AWS solutions across industries in Germany and Austria, including projects with regulatory requirements.
  
  Supported pre-sales as a Solutions Engineer and contributed to hiring new consultants.
  
  Built a Serverless application with a state machine architecture, including PDF generation and email delivery (API Gateway, Lambda, DynamoDB, Elasticsearch, Terraform).
  
  Led a migration from Microsoft SQL Server to Amazon Aurora MySQL Serverless for SAP Commerce, resolving Unicode and performance issues while optimizing monitoring with New Relic.
  
  Directed the migration of a VMware Workspace ONE infrastructure to AWS Cloud for a German insurance company, including VM conversion to EC2, Jenkins pipelines, and an active-active multi-region setup with Route 53 for 300k+ simultaneous device connections.
- **Senior DevOps Engineer at PriceSpider** (Jan 2018 - Jul 2019)
  Full-time · On-site
  Ensured PriceSpider's brand commerce platform "CommerceConnector" reliability, security, and performance, while implementing Prometheus for effective business KPI monitoring and enhancing log management with Splunk. Provided Architecture & Infrastructure support for Quality and Data Engineering projects, utilizing containers, AWS Lambda, and related monitoring.
- **AWS Cloud Engineer at Nuvme** (Mar 2017 - Dec 2017)
  Contract · Hybrid
  Worked in several infrastructure migration projects to AWS
  \- from scalable web applications to legacy and ERP applications
  \- using my expertise in Linux, web applications, monitoring and security in the Cloud context.
- **Freelance Cloud & Observability Engineer** (Mar 2017 - Dec 2017)
  Freelance · Remote
  Served as a Monitoring Consultant, offering comprehensive monitoring solutions for new technologies and platforms, enhancing existing monitoring systems, and providing valuable support to customer teams in optimizing their platforms.
- **Linux & Open Source Consultant at Indyxa Group** (Jan 2014 - Mar 2017)
  Full-time · On-site
  Provided infrastructure, monitoring and log management consulting, improving monitoring capabilities, developing custom monitoring plugins, and implementing critical infrastructure projects, resulting in enhanced reliability, performance, and security for mission-critical environments, impacting millions of customers and facilitating financial transactions worth millions of dollars.
- **IT Support Analyst at QuickSoft Sistemas de Informações** (Aug 2012 - Jan 2014)
  Full-time · On-site
  Provided comprehensive enterprise infrastructure support, including data protection, collaboration with Tupy SA for data security, and development of backup monitoring and automation tools.
- **Linux Administration Instrutor at Proway IT Training** (May 2013 - Jun 2013)
  Temporary · On-site
  Managed the Red Hat Linux Administration Course, focused on RHEL5/6 configuration, system and network services management.
- **IT Support Technician at Advance Solution** (Oct 2008 - Jul 2012)
  Full-time · On-site
  Provided comprehensive IT services support, managing multiple customer infrastructures, including firewalls, virtualization, email, file servers, directory services, VPNs, server hardware, antivirus, and workstations, while conducting software asset management for program standardization and licensing.

## Talks & sessions

### [Functional Domain Modeling with Gleam](https://sifa.id/p/runlevel0.me/talk/functional-domain-modeling-with-gleam-3mujvtj3pso27)
_16 min · developers, software architects_
This presentation demonstrates how Gleam's powerful type system and functional programming paradigm excel at domain modeling within Domain-Driven Design (DDD).

It showcases Gleam's ability to create highly accurate domain representations through structs to represent data, union types for modeling choices, and pure functions that directly reflect business workflows.

It also explores how Gleam's syntax makes domain logic self-evident and accessible to non-programmers while maintaining the robustness and concurrency benefits of the BEAM for production systems.

- Code BEAM Europe 2025 · Nov 2025 · Berlin, State of Berlin, Germany · Presenter
- Elixir, Erlang & Gleam Meetup Munich · Feb 2025 · Munich, Bavaria, Germany · Presenter · In person

## Skills

### Technical
- Amazon Web Services (AWS)
- Apache
- AWS
- Back-End Web Development
- Bash Script
- CI/CD
- Cloud Infrastructure
- Continuous Integration and Continuous Delivery (CI/CD)
- DevOps
- Distributed Systems
- Docker
- ElasticSearch
- Elixir
- Erlang
- F#
- FastAPI
- GitHub
- Hono
- JIRA
- Kubernetes
- Linux
- Linux System Administration
- MySQL
- Next.js
- Nginx
- Node.js
- OAuth
- Phoenix Framework
- Platform Engineering
- PostgreSQL
- Python
- Python (Programming Language)
- Quality Assurance
- Rust
- Rust (Programming Language)
- Scala
- SDLC
- Software Development
- Software Engineering
- Terraform
- Test-Driven Development
- TypeScript
- Web Application Development
- Web Development
- Windows Server
### Business
- Product Development
- Training & Development
### Interpersonal
- Leadership
- Team Leadership
- Technical Leadership
### Security
- Network Infrastructure
### Other
- AI-native
- Amazon Bedrock
- Amazon CloudFront
- Amazon Dynamodb
- Amazon EC2
- Amazon EKS
- Amazon Relational Database Service (RDS)
- Amazon Route 53
- AWS API Gateway
- AWS Backup
- AWS Bedrock
- AWS Bedrock AgentCore
- AWS CDK
- AWS Cloud Migration
- AWS Cost Optimization
- AWS ECR
- AWS ECS
- AWS EKS
- AWS EventBridge
- AWS Fargate
- AWS IAM Identity Center
- AWS Lambda
- AWS Landing Zone
- AWS Organizations
- AWS RDS
- AWS S3
- AWS Security
- AWS SNS
- AWS SQS
- Behavior-Driven Development
- CDK
- CentOS
- Claude Agents SDK
- Claude Code
- Cloud Applications
- Cloud Compliance
- Cloud Consulting
- Cloud-Native Applications
- Confluence
- Cypress
- Dependency-Track
- EventCatalog
- Forefront TMG
- Fortinet
- Gleam
- Grafana
- Graylog
- HAProxy
- Helm
- ISA Server
- Loki
- Lustre Framework
- OpenAPI
- Oracle Enterprise Linux
- Prometheus
- Pulumi
- pytest
- RHEL
- RHEL 7
- SBOM
- Serverless
- Serverless Computing
- Serverless Framework
- Software Engineering Practices
- Software Systems Engineering
- Solution Architecture
- Strands AI Agents SDK
- Trivy
- TSM Administration
- Vitest
- VMware
- Windows Desktop Administration
- Zimbra

## Credentials

- Claude Certified Architect - Foundations — Anthropic (Jul 2026 - Jul 2027) https://www.credly.com/badges/588593bd-d4a6-49d2-9919-aeb677c3d609/
- SADMF Practitioner — Scaled Agile DevOps (Mar 2024) https://badgr.com/public/assertions/vaHt8ctjTlCLvHyOu5FBGw
- Rust: Asynchronous Programming with Tokio — LinkedIn Corporation (Jan 2024) https://www.linkedin.com/learning/certificates/1339989129e437b97f9de29008b72914b2eb547fb0c7fe59e4d73b612b4dce59
- Rust for Java Developers — LinkedIn Corporation (Jan 2024) https://www.linkedin.com/learning/certificates/47bec54cdeca7895c75d0bff2f76b07fb2b9b71b156664d9e329dd4c8188d730
- Design Patterns for Rust — LinkedIn Corporation (Jan 2024) https://www.linkedin.com/learning/certificates/311a29ea4d9f7c06eec5e8f1badc0d970f937e5a07583aca25d138674ef34a9c
- Amazon Web Services Solutions Architect Associate — Amazon Web Services (May 2020 - May 2023) http://aws.amazon.com/verification
- Red Hat Certified Engineer - RHEL 7 — Red Hat (Dec 2014 - Dec 2017)

## Education

- **Universidade Regional de Blumenau** — Computer Science (Jul 2015 - Jul 2016)
  Incomplete bachelor studies, dropped after second semester to focus on self-paced online education.

## Involvement

### Community
- FP Stammtisch Munich (Mar 2026 - Present)
  Munich, Bavaria, DE
  Organizer
  Monthly casual get-together for anyone interested in pragmatic Functional Programming around Munich. It is about connecting with other people who care about functional programming and applying it in practice.
  
  There are no formal presentations or fixed agendas, just open conversations about building software with pragmatic FP.
  
  ​Whether you're using FP in production, working on side projects, or exploring the approach, this is a space to meet peers, exchange perspectives, and learn from each other.
  
  Everyone is welcome, regardless of experience level or background.
  Skills: Gleam, Elixir, Erlang, Scala
- Elixir & Erlang Munich Meetup (Feb 2024 - Present)
  Organizer
  We are the meetup for everything related to Elixir, Erlang, Gleam and the BEAM in general in Munich.
  Skills: Elixir, Erlang, Gleam, Phoenix Framework, Lustre Framework

## Languages

- English (native)
- German (native)
- Portuguese (native)

## Links

- LinkedIn: https://www.linkedin.com/in/eduardohki
- Website: https://runlevel0.me
- GitHub: https://github.com/eduardohki
- Fediverse: https://genserver.social/runlevel0