Samsu Sempena

Guided by Fiat Lux—be light of the world—I lead through technology, entrepreneurship, and discipleship.

See the journeyLet's talk

How I work

Why

Fiat Lux

Be light of the world. I believe technology should illuminate paths forward—clarifying what's possible, empowering people, and building trust in an uncertain landscape.

How

Three pillars

Technology that scales, entrepreneurship that validates, and discipleship that grows people—blending deep tech with venture rigor and patient mentorship.

What

Roles I play

As a CTO, I architect platforms. As a mentor, I develop leaders. As an author, I share what I've learned so others can move faster.

💡
⚙️
Technology
Scales
🚀
Entrepreneurship
Validates
🌱
Discipleship
Grows
🏗️
CTO
Architect
🎯
Mentor
Develop
📚
Author
Share
Fiat Lux
Be Light of the World

The journey

From scaling a startup across 100+ cities to governing digital public infrastructure for 14M+ beneficiaries—here's where I've learned to build systems that matter.

Co-Founder & CTO | Holocare

Jan 2026 - Present
  • Building AI-powered operational intelligence that helps care organizations move from reactive care to proactive, continuously improving systems.
  • Architecting a scalable voice AI platform for real-time documentation, risk detection, and decision support across care workflows.
  • Delivering people-first product experiences that align caregivers, families, and administrators through live communication and compliant activity capture.
  • Implementing retrieval-augmented generation (RAG) and vector search to surface context-aware insights from clinical guidance and operational data.

Director of Technology | PMO Prakerja, GovTech Indonesia

May 2022 - Dec 2024
  • Government program recognised by the UN SDGs; supports >14 million beneficiaries.
  • Designed and governed technology architecture, data flows, and security frameworks for one of the largest digital public infrastructure systems in Southeast Asia.
  • Led cross-platform integrations with payment providers, identity systems, and digital service partners—ensuring reliability, safety, and compliance.
  • Guided cloud, infrastructure, and engineering teams to deliver highly available and auditable systems for conditional cash transfers.

Lead Engineer / Venture CTO | BCG Digital Ventures (now BCG X)

July 2020 – April 2022
  • Defined end-to-end architecture for new ventures across sectors including ed-tech, SaaS, and digital banking.
  • Worked closely with product, design, and commercial teams to translate business needs into scalable technical roadmaps.
  • Built data pipelines, ML-enabled prototypes, and cloud-native environments to validate market hypotheses.
  • Led engineering teams across multiple time zones, ensuring code quality, velocity, and secure deployment.

Chief Technology Officer | Airy (Indonesia’s budget accommodation network)

Jan 2016 – June 2020
  • Scaled platform for 20,000 rooms across 100+ cities; achieved >1M app downloads.
  • Built backend services, partner APIs, and operational platforms using cloud-native and event-driven architectures.
  • Managed engineering, product, and data teams; implemented DevOps and CI/CD practices to accelerate delivery.
  • Standardised operational processes across thousands of partner properties through digital tools and automated QA.

Expertise

A blend of hands-on engineering and strategic leadership—spanning cloud infrastructure, AI systems, security, and team development.

AWSGoogle Cloud PlatformMicrosoft AzureCloud ArchitectureKubernetesDockerTerraformInfrastructure as CodeCI/CDDevOpsGitOpsHigh AvailabilityDisaster RecoverySite Reliability EngineeringMonitoring and ObservabilityCapacity Planning
Artificial IntelligenceMachine LearningLarge Language ModelsGenerative AINatural Language ProcessingVoice AIReal-time InferenceVector DatabasesRAGAWS BedrockOpenAIPostgreSQLMongoDBDatabase DesignData ArchitectureData Governance
CybersecurityInformation SecurityThreat ModelingNetwork SecurityCloud SecurityIdentity and Access ManagementIAMData PrivacySecurity ComplianceISO 27001SOC 2GDPR
Enterprise ArchitectureSolution ArchitectureSystem ArchitectureTechnical ArchitectureMicroservicesService-Oriented ArchitectureDomain-Driven DesignEvent-Driven ArchitectureAPI DesignREST APIGraphQLIntegration ArchitectureScalable SystemsSystem Design
Backend DevelopmentGoGolangPythonNode.jsTypeScriptJavaScriptReactNext.jsPerformance OptimizationCode ReviewQuality AssuranceTechnical DocumentationSDLC
Technical LeadershipEngineering ManagementTeam LeadershipCross-functional CollaborationStakeholder ManagementRequirements GatheringBusiness AnalysisTechnical RoadmapStrategic PlanningProduct DevelopmentMVP DevelopmentAgileScrumLean MethodologiesProof of ConceptCloud MigrationDigital TransformationCost OptimizationFinOpsBudget ManagementVendor Management

Let's build something that matters

Whether you're hardening a platform, exploring generative AI, or launching a new venture—I'm here to help you move from idea to impact.

EmailLinkedInGitHub