English

Hello, I'm David Tjong-Ayong

A seasoned Tech Lead and Software Development Expert.

IT & Development Manager • Solution Architect • Engineering Leader

The Hague, The Netherlands • +31 6 34054119 • dtjongayong@gmail.com

About me

I'm coaching-oriented IT leader and solution architect with 16+ years in IT and 5+ years of experience building high-performing development teams, modernizing digital platforms, and driving end-to-end technology strategy.


Specialized in Azure cloud migrations, microservice and micro-frontend architectures, CI/CD, QA strategy, DevOps, security-by-design, and scalable platform engineering.


Recognized for a leadership style rooted in trust, autonomy, clear direction, and continuous improvement. Strong ability to translate business objectives into pragmatic technical execution. Positioned for roles such as Senior IT Manager, Head of Development, Engineering Manager, or CTO-track.

Recent roles

Schouten Zekerheid — Insurance & Risk Services

Jan 2024 – Present: IT & Development Manager

Jun 2022 – Dec 2023: Lead Developer / IT Lead

Schouten Zekerheid's development department operates three strategic portals; Customer, Employee, and Partner. Forming the backbone of the digital client journey and operational workflows.

Leadership & Responsibilities

  • Lead and coach a multidisciplinary software development team.
  • Define and execute technology strategy, architectural direction, and roadmap planning.
  • Product Owner for the Customer Portal, Employee Portal, and Partner Portal.
  • Establish and mature development processes aligned with ISO 27001 / ISO 9001 requirements.
  • Reduce technical debt through a structured, strategy-driven program integrated into quarterly planning.
  • Scale internal engineering capability while reducing dependency on external contractors.

Key Achievements

Coaching Leadership & Team Development

  • Transformed the team into a mature, self-organizing engineering unit.
  • Introduced career development frameworks, coding standards, PR guidelines, and delivery discipline.
  • Reduced external staffing by over 40% while increasing internal capability and stability.

Establishment of a Comprehensive QA Strategy

Implemented a risk-based QA framework covering:

  • Automated unit, integration, and regression tests
  • Build-level QA gates in CI/CD pipelines
  • Definition of Ready & Definition of Done as formal quality checkpoints
  • Monitoring dashboards (Sentry/Flare) with release KPIs

Result: higher release reliability and fewer production incidents.

ISO-Aligned SDLC & Governance

  • Formalized software development life cycle, release governance, risk registers, and audit-ready documentation.
  • Embedded security controls and immutable audit trails into CI/CD pipelines.
  • Established clear ownership, escalation paths, and compliance workflows.

Introduction of Microservice Architecture

  • Transitioned legacy monolithic components into domain-driven microservices.
  • Defined team ownership boundaries, API contracts, service governance, and versioning strategy.
  • Improved scalability, deploy speed, fault isolation, and developer autonomy.
  • Laid the foundation for future modular portal evolution.

Cloud Migration: AWS → Azure (Infrastructure as Code)

  • Designed the full Azure architecture, including Landing Zones, API Management, App Services, and Front Door.
  • Introduced Infrastructure as Code (Bicep) to standardize, secure, and automate deployments.
  • Delivered improved reliability, observability, and cost efficiency through architecture and IaC practices.

Tech Stack

Laravel, Vue, Node.js, Azure (Front Door, App Services, API Management, Bicep IaC), SQL, Redis, GitHub Actions CI/CD, Sentry, Flare, Confluence, Jira.

Previewes roles


BusinessOne — Enterprise Software Consultancy

Jun 2021 – Jun 2022: Software Engineer / Architect

  • Introduced Gitflow, Semantic Versioning, Code Review policies.
  • Designed and implemented CI/CD pipelines and DevOps practices.
  • Built scalable FE/BE applications in Angular and .NET.
  • Delivered a web-based POS system with thermal printer integration.

ANWB — Conversational AI Team

Jul 2019 – Jun 2021: Solution Architect & Lead Developer

  • Designed a new chatbot and live chat platform enabling seamless bot ↔ live agent transitions.
  • Defined QA approach, automation practices, analytics, monitoring, and platform governance.
  • Enhanced Virtual Assistant stability, scalability, and multi-team reusability.

ANWB — Client Portal Team

Apr 2016 – Jun 2019: Lead Front-End / Full-Stack Developer

  • Developed and maintained front-end applications for the Self-Service Portal.
  • Implemented automated regression testing with Cucumber.
  • Introduced data-driven development with KPI frameworks and analytics.
  • Mentored junior and medior engineers.

Medipix — HealthTech Startup

2018 – 2020: Co-Founder / iOS & Full-Stack Developer

  • Shaped technical vision and system architecture.
  • Developed iOS and web applications (Swift, React, Node).
  • Reduced implementation time and complexity through strategic UX/tech decisions.

Ngrane Interactive

2011–2016: Full-Stack & iOS Developer

Bynder

2011–2016: Full-Stack Developer

Label A

2015: iOS Developer

ROC Mondriaan

2015–2017: Software Development Instructor


Education & Certifications

Professional Certifications

  • Digital Leadership Certificate - Growth Tribe (2023)
  • Microsoft Azure Fundamentals AZ-900 (2023)
  • How to Become an Outstanding Solution Architect — Mark Farragher (2020)
  • Google Analytics — CXL Institute (2019)
  • Professional Scrum Master — The Liberators (2018)
  • Ethical Hacking Foundation — Security Academy (2017)

Academic Background

  • BSc Computer Engineering — The Hague University of Applied Sciences (2015)
  • Technical Informatics & Systems Engineering - TU Delft (2012)
  • BSc Electrical Engineering - UNA Curacao (2007)

Skills

Leadership & Management

  • Coaching leadership
  • Team development
  • Tech strategy
  • Product ownership
  • Delivery management
  • Roadmapping
  • Stakeholder management
  • Vendor management

Architecture & Technology

  • Azure / AWS
  • Infrastructure as Code (Bicep)
  • Microservices
  • Micro Frontends
  • Event-driven design
  • API architecture
  • DevOps
  • CI/CD
  • Security-by-design
  • Observability

Engineering Skills

  • Laravel
  • Vue
  • React
  • Node.js
  • .NET
  • Python
  • SQL/NoSQL
  • Redis
  • Automated testing
  • Performance engineering

Tooling

  • GitHub Enterprise
  • GitLab
  • Jira
  • Confluence
  • Webpack
  • NPM/Yarn
  • Sentry
  • Flare
  • Jenkins
  • Cypress/Cucumber

Languages

  • Dutch — Fluent
  • English — Fluent
  • Spanish — Fluent spoken
  • French — Basic

Personal Interests & Hobbies

  • Strength training & discipline-based fitness
  • Badminton — former competitive, now recreational
  • Tech conferences (architecture, DevOps, AI, cloud)
  • Mentoring engineers and cultivating engineering culture
  • Innovation experiments: microservices, event-driven design, platform engineering
  • Product design, UX thinking & simplifying complex systems

Nederlands

Hallo, ik ben David Tjong-Ayong

Een ervaren Tech Lead en Software Development Expert.

IT & Development Manager • Solution Architect • Engineering Leader

Den Haag, Nederland • +31 6 34054119 • dtjongayong@gmail.com

Over mij

Ik ben een coachend IT-leider en solution architect met 16+ jaar ervaring in IT en meer dan 5 jaar ervaring in het bouwen van high-performing development teams, het moderniseren van digitale platformen en het aansturen van end-to-end technologische strategieën.


Gespecialiseerd in Azure-cloudmigraties, microservice- en micro-frontendarchitecturen, CI/CD, QA-strategie, DevOps, security-by-design en schaalbare platform engineering.


Bekend om een leiderschapsstijl gebaseerd op vertrouwen, autonomie, duidelijke richting en continue verbetering. Sterk in het vertalen van bedrijfsdoelen naar pragmatische technische uitvoering. Gepositioneerd voor rollen zoals Senior IT Manager, Head of Development, Engineering Manager of CTO-track.

Recente rollen

Schouten Zekerheid — Verzekeringen & Risicodiensten

Jan 2024 – heden: IT & Development Manager

Jun 2022 – dec 2023: Lead Developer / IT Lead

De ontwikkelafdeling van Schouten Zekerheid beheert drie strategische portalen: Klant, Medewerker en Partner. Deze vormen de ruggengraat van de digitale klantreis en de operationele workflows.

Leiderschap & Verantwoordelijkheden

  • Leiden en coachen van een multidisciplinair software developmentteam.
  • Technologiestrategie, architectuurrichting en roadmapplanning definiëren en uitvoeren.
  • Product Owner van het Klantportaal, Medewerkerportaal en Partnerportaal.
  • Ontwikkelprocessen professionaliseren conform ISO 27001 / ISO 9001-richtlijnen.
  • Reduceren van technische schuld via een gestructureerd, strategisch programma dat onderdeel is van kwartaalplanning.
  • Opschalen van interne engineeringcapaciteit en afbouwen van afhankelijkheid van externen.

Belangrijkste Prestaties

Coachend Leiderschap & Teamontwikkeling

  • Het team getransformeerd tot een volwassen, zelforganiserende engineeringunit.
  • Career frameworks, coding standards, PR-richtlijnen en delivery discipline geïntroduceerd.
  • Externe inhuur met meer dan 40% verminderd, terwijl interne capaciteit en stabiliteit groeiden.

Opzet van een Volledige QA-Strategie

Een risicogebaseerd QA-framework geïmplementeerd bestaande uit:

  • Geautomatiseerde unit-, integratie- en regressietests
  • QA-controles op build-niveau in CI/CD-pipelines
  • Definition of Ready & Definition of Done als formele kwaliteitspoorten
  • Monitoring-dashboards (Sentry/Flare) met release-KPI's

Resultaat: hogere releasebetrouwbaarheid en minder productie-incidenten.

ISO-Uitgelijnde SDLC & Governance

  • SDLC, release governance, risicoregisters en audit-klare documentatie formeel ingericht.
  • Security-controles en onveranderlijke audittrails opgenomen in CI/CD-pipelines.
  • Duidelijke eigenaarschapstructuren, escalatiepaden en compliance workflows opgezet.

Introductie van Microservice-architectuur

  • Legacy monolithische componenten opgesplitst naar domeingedreven microservices.
  • Team-ownership, API-contracten, service governance en versiebeheer gedefinieerd.
  • Verbeterde schaalbaarheid, deploy-snelheid, foutisolatie en ontwikkelaarsautonomie.
  • Basis gelegd voor toekomstige modulaire uitbreiding van portalen.

Cloudmigratie: AWS → Azure (Infrastructure as Code)

  • Volledige Azure-architectuur ontworpen, inclusief Landing Zones, API Management, App Services en Front Door.
  • Infrastructure as Code (Bicep) geïntroduceerd voor gestandaardiseerde, veilige, geautomatiseerde deployments.
  • Betere betrouwbaarheid, observability en kostenefficiëntie gerealiseerd via architectuur en IaC-praktijken.

Technische Stack

Laravel, Vue, Node.js, Azure (Front Door, App Services, API Management, Bicep IaC), SQL, Redis, GitHub Actions CI/CD, Sentry, Flare, Confluence, Jira.

Eerdere rollen


BusinessOne — Enterprise Software Consultancy

Jun 2021 – Jun 2022: Software Engineer / Architect

  • Gitflow, Semantic Versioning en Code Review-richtlijnen geïntroduceerd.
  • CI/CD-pipelines en DevOps-praktijken ontworpen en geïmplementeerd.
  • Scale-bare FE/BE-applicaties gebouwd in Angular en .NET.
  • Web-based POS-systeem geleverd met thermische printerintegratie.

ANWB — Conversational AI Team

Jul 2019 – Jun 2021: Solution Architect & Lead Developer

  • Nieuw chatbot- en live chat-platform ontworpen met naadloze bot ↔ live agent overgang.
  • QA-aanpak, automatisering, analytics, monitoring en platform governance gedefinieerd.
  • Stabiliteit, schaalbaarheid en herbruikbaarheid van de Virtual Assistant verbeterd.

ANWB — Client Portal Team

Apr 2016 – Jun 2019: Lead Front-End / Full-Stack Developer

  • Front-end applicaties ontwikkeld en beheerd voor het Self-Service Portaal.
  • Automatische regressietests geïmplementeerd met Cucumber.
  • Data-gedreven development geïntroduceerd via KPI-frameworks.
  • Junior en medior developers gementord.

Medipix — HealthTech Startup

2018 – 2020: Co-Founder / iOS & Full-Stack Developer

  • Technische visie en systeemarchitectuur vormgegeven.
  • iOS- en webapplicaties ontwikkeld (Swift, React, Node).
  • Implementatietijd en complexiteit verlaagd door strategische UX/techkeuzes.

Ngrane Interactive

2011–2016: Full-Stack & iOS Developer

Bynder

2011–2016: Full-Stack Developer

Label A

2015: iOS Developer

ROC Mondriaan

2015–2017: Instructeur Software Development


Opleiding & Certificeringen

Professionele Certificeringen

  • Digital Leadership Certificate - Growth Tribe (2023)
  • Microsoft Azure Fundamentals AZ-900 (2023)
  • How to Become an Outstanding Solution Architect — Mark Farragher (2020)
  • Google Analytics — CXL Institute (2019)
  • Professional Scrum Master — The Liberators (2018)
  • Ethical Hacking Foundation — Security Academy (2017)

Academische Achtergrond

  • BSc Computer Engineering — De Haagse Hogeschool (2015)
  • Technische Informatica & Systems Engineering — TU Delft (2012)
  • BSc Elektrotechniek — UNA Curaçao (2007)

Vaardigheden

Leiderschap & Management

  • Coachend leiderschap
  • Teamontwikkeling
  • Technologiestrategie
  • Product ownership
  • Delivery management
  • Roadmapping
  • Stakeholdermanagement
  • Vendor management

Architectuur & Technologie

  • Azure / AWS
  • Infrastructure as Code (Bicep)
  • Microservices
  • Micro Frontends
  • Event-driven design
  • API-architectuur
  • DevOps
  • CI/CD
  • Security-by-design
  • Observability

Engineeringvaardigheden

  • Laravel
  • Vue
  • React
  • Node.js
  • .NET
  • Python
  • SQL/NoSQL
  • Redis
  • Automated testing
  • Performance engineering

Tooling

  • GitHub Enterprise
  • GitLab
  • Jira
  • Confluence
  • Webpack
  • NPM/Yarn
  • Sentry
  • Flare
  • Jenkins
  • Cypress/Cucumber

Talen

  • Nederlands — Vloeiend
  • Engels — Vloeiend
  • Spaans — Vloeiend gesproken
  • Frans — Basis

Persoonlijke interesses & Hobby’s

  • Krachttraining & discipline-gerichte fitness
  • Badminton — voormalig competitief, nu recreatief
  • Techconferenties (architectuur, DevOps, AI, cloud)
  • Mentoring van engineers & het bouwen van een sterke engineeringcultuur
  • Innovatie-experimenten: microservices, event-driven design, platform engineering
  • Productdesign, UX-denken & het vereenvoudigen van complexiteit