Marvyn Zalewski
Engineering Manager
Cloud Platforms · Barcelona

I'm on a mission to build an empowering developer experience, so engineers can focus on shipping and operating great products; faster, more reliable, efficient, and secure.

*a greeting from North Germany

Focus

FinOpsPlatform EngineeringCloud & DevOpsCloud SecuritySRE

I build high-trust, autonomous teams - and the platforms, tooling and culture that let engineers ship great products.

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Hover a principle to see what it means.

Results

Real challenges with measurable outcomes.

05 initiatives
FinOpsAWSStrategyLeadership
$1M+
annualized savings

Exceeded goal, delivering over $1M in annualized savings and dramatically improving forecast accuracy from over 30% deviation (forecast vs actuals) to under 4%.

CI/CDPlatform EngineeringDevEx
16h saved
per new-service setup

Cut new-service setup time by 16 hours with golden pipelines and eliminated manual deployment interventions.

SecurityAWSIAMAutomation
days → <5 min
access provisioning

Eliminated waiting times for permission changes, saved time on security reviews, and significantly improved the overall security posture.

SREStrategyIncident Management
Audit-ready
unified incident mgmt

Established a clear SRE path forward and delivered an auditable incident management framework, improving operational data quality.

LeadershipHiringOrganizational Resilience
6 → 12
engineers, 10 months

Grew the team from 6 to 12 engineers with a 1/5/6 junior-mid-senior mix. Delivery and operational stability were maintained throughout. Received feedback: "Exceeded expectations by delivering stability and keeping the morale up where many would struggle."

My Approach

My principles are simple: remove every obstacle between engineers and shipping great products.

I build high-trust, autonomous teams and invest in the platforms, tooling, and culture that make this possible. With a background spanning DevOps, security architecture, and cloud platform strategy, I connect technical solutions to business outcomes. I specialize in creating tangible results through FinOps, modern and AI-native platform engineering, and organizational design using frameworks like Team Topologies.

What I Do

Everything I do goes into one direction: an enabled and empowered developer experience from product ideation to its retirement.

Platform Engineering and Developer Enablement

I treat the platform as a product to accelerate the entire engineering organization. By investing in CI/CD, observability, and data-driven DevEx improvements, I reduce friction and empower product teams to deliver value to customers faster and more frequently.

FinOps and Cost Optimization

I translate cloud spend into business metrics that everyone can understand. By building a culture of financial accountability and partnering with Finance, I deliver recurring savings and improve budget predictability.

Cloud and DevOps

I design and implement scalable operating models using frameworks like Team Topologies. By clarifying ownership and creating clear communication paths, I transform siloed groups into a high-performing, collaborative engineering system where teams own their services end-to-end.

Cloud Security

I embed security into the development lifecycle, enabling teams with the guardrails and tools they need to build secure products by default. I implement comprehensive security architectures, including Secure Product Lifecycle (SPLC) and modernized IAM, to harden cloud environments to withstand both evolving threats and zero-day vulnerabilities.

Career

From hands-on engineering to platform leadership - select a company to expand its roles.

2011 → Now
Engineering Manager for Cloud PlatformsAug 2024 - Present

Leading a cross-cultural Cloud Platform and DevOps organization across UK, Germany, Romania, and Spain. Responsible for cloud platform strategy, cloud landingzone infrastructure, CI/CD, observability, SRE, and FinOps. I am on a mission to build a resilient, cost-effective platform that accelerates the entire engineering organization.

Rebuilt the team from 6 to 12 engineers in 10 months after a restructure, hiring across several European countries to staff DevOps in every product domain, filling skill gaps with a deliberate 1/5/6 junior-mid-senior mix while maintaining delivery and operational stability throughout.
Established the FinOps function from scratch, achieving $84,000+ in monthly recurring savings across AWS and Datadog within 6 months on $3.5M+ of annual spend, and reducing budget forecast variance from 20% to 3% through a structured, domain-level cost planning process.
Led the CI/CD platform modernisation, replacing Jenkins, Harbor, and Nexus with GitHub Actions and cloud-native tooling, which became the company-wide CI/CD standard with about 50 engineers contributing. Golden pipelines cut new project initialization time by 16 hours, eliminated 10 weekly support tickets, use OIDC short-lived credentials, and include an emergency deployment mode for when GitHub is down.
Built a GitHub Actions pipeline that lets engineering teams get GitHub Copilot access themselves.
Leading the datacenter-to-AWS migration of 1,400+ VMs: ran vendor selection and secured $150,000 in AWS MAP funding to fully fund phase one by connecting the right stakeholders and reworking the vendor ARR model, which resulted in a signed contract within 7 months. Datacenter exit is planned for 2027.
Wrote and implemented the "You Build It, You Run It" operating model and a company-wide SRE strategy, clarifying ownership across all team types and re-implementing incident management ahead of a security audit.
Moved DevOps from a central team that had become a bottleneck into the product domains, with two enablement engineers per domain, and took the team through the change in 1:1s and a ways-of-working workshop that produced the guide for enablement engineers.
Drove the observability strategy, standardizing on OTEL and Vector to reduce complexity and cost across 15+ engineering teams.
Raised engineering teams' DX survey rating of DevOps/CPE from 68 to 82 and my team's rating of me and P&T from 62 to 73, while Focus Time, Supporter of the Week, and psychological-safety check-ins helped lift the Peakon engagement score from 7.2 to 8.3.
Cloud DevOps ManagerJan 2024 - Aug 2024

Restructured the team and its operating model to remove systemic bottlenecks and clarify ownership using Team Topologies.

Analyzed operational bottlenecks, defined a new department charter, and led a re-organization into distinct DevOps, Cloud Platform, and IT Ops teams within 7 months.
Coached 3 senior DevOps engineers across Germany and Italy to successfully conclude the AWS landing zone for organizational adoption.
Replaced Docker Desktop with open-source tooling, improving developer experience and achieving $18,000 in annual savings.
Hired the two managers who lead the new sister teams.
Engineering ManagementAWSFinOpsSRE StrategyCI/CDPlatform EngineeringCloud MigrationTeam Topologies

Core Competencies

Leadership & Strategy

People-Centric LeadershipEngineering ManagementSystemic ThinkingTeam Building & CoachingOrganizational DesignStakeholder ManagementHiringPsychological Safety

Platform Engineering

Developer Experience (DevEx)Cloud Cost Management (FinOps)Service Reliability (SRE)Observability (Datadog, OTEL, Vector)Internal Developer PlatformsTeam TopologiesYou Build It, You Run It

Cloud & Infrastructure

AWS (Advanced)Terraform/CDKTFDockerCI/CD (GitLab, GitHub Actions)AnsibleCloud Migration (AWS MAP)

Security

Cloud Security ArchitectureSecure Product Lifecycle (SPLC)Threat ModelingAWS Security HubNIST/ISO FrameworksPCI-DSSIdentity & Access Management

Kudos

What colleagues and leaders say.

01 / 09

Any organisation building or running cloud infrastructure at scale would be lucky to have him.

“Marvyn reported to me as Engineering Manager for Cloud Platform at Awin, and he was the person I trusted with the work that had the least room for error. Two things stand out. The first is technical judgement: Marvyn owns cloud platform decisions that carry real cost and reliability consequences, and he consistently…”

MC

Marcos Cherem

Platform & Workplace Engineering Director at Funding Circle

Say Hi

This is my professional showcase. I'm always open to connecting over shared interests in platform engineering, leadership, or just good tech and coffee conversations.