Dimitrios Dontsios

Director of Engineering

Amsterdam, North Holland, Netherlands9 yrs 7 mos experience

Most Likely To SwitchAI Enabled

Key Highlights

Over 7 years of experience in software and data engineering.
Proven leadership in managing engineering teams and projects.
Expertise in building scalable data platforms and systems.

Stackforce AI infers this person is a highly skilled engineer specializing in Fintech and SaaS with strong leadership capabilities.

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Skills

Core Skills

Engineering ManagementSoftware EngineeringSite Reliability EngineeringData EngineeringDevopsMachine LearningEmbedded Systems Engineering

Other Skills

ATLAWSAcceleoAgile Project ManagementAlgorithmsApache KafkaArtificial IntelligenceBackbone.jsBootstrapCC++CSSCUDACommunication SkillsComputer Hardware

About

Versatile engineer and technical team lead, experienced in software, data and site reliability with more than 7 yoe. Greatly fascinated by database technologies, AI and automation, software modelling/architecture techniques, efficient data pipelines, streaming and ML. Characterised by teamwork, communication ease, dedication to efficient problem solving and positive attitude. Likes to motivate and inspire people. Loves to travel and discover local delicacies around the world.

Experience

9 yrs 7 mos

Total Experience

1 yr 7 mos

Average Tenure

3 yrs 1 mo

Current Experience

Adyen

3 roles

Engineering Team Lead - Data Platform

Jan 2025 – Present · 1 yr 5 mos · Hybrid

Engineering Team Lead - Experimentation Platform

Promoted

May 2023 – Mar 2025 · 1 yr 10 mos · Hybrid

Managing a team of 5 engineers (frontend, backend and data).
Collaborating closely with product counterparts shaping the strategic vision of the experimentation platform and contributing to product planning.
Introducing and maintaining reliability best practices, increasing the confidence in teams products.
Leading by example by staying hands-on and delivering features in Backend and Data domains (java, python, spark, postgresql, druid)
Supporting growth of others by mentoring and coaching initiatives.

JavaPythonSparkPostgreSQLDruidEngineering Management+1

Java Software Engineer

May 2019 – Sep 2021 · 2 yrs 4 mos · Amsterdam, North Holland, Netherlands

Working on Java backend, low latency, high availability, high traffic, data heavy services.
Starting and leading Adyen’s Feature Store for Machine learning using Python, Java, Spark, HDFS, Postgresql and Feast concepts.
Starting and leading Adyen’s Experimentation Platform mainly using Java, Postgresql.
Maintaining and leading one of the biggest parts of Adyen’s revenue optimisation (https://www.adyen.com/our-solution/revenue-optimization) platform.
Designing, maintaining and scaling large Postgresql schemas, indices and data consumers used for realtime reporting.
Participating in requirements engineering and calls with clients.
Mentoring junior engineers and participating in Interviews, code reviews and software architecture talks.

JavaPythonSparkPostgreSQLSoftware EngineeringData Engineering

Booking.com

Site Reliability Engineer

Sep 2021 – Apr 2023 · 1 yr 7 mos · Amsterdam, North Holland, Netherlands

Designing and building software systems for performance, scalability, reliability, reporting and monitoring of the payments platform.
Designing, building and maintaining high throughput (TB of data daily), multi-cluster (compliance) data streaming pipelines using Apache Kafka, Flink and AWS (step, lamda, s3).
Orchestrating hundreds of microservices using Kubernetes, helm, docker.
Creating advanced reporting pipelines for incidents and incident management using Kafka, Hadoop, Spark, Java, Python, Argo and Kubernetes
Defining alerting on SLOs and and creating monitoring tools using Grafana, Prometheus and Elastic stack.
Reviewing software and systems architecture for large traffic systems, post mortems and interviewing new candidates.
Scaling/Abstracting networking and load balancing puppet configuration using Ruby.
Prototyping event logging solutions using Kafka and Java.
Participating in and designing chaos testing and infrastructure drills.
Participating in a 24/7 on-call, handling incidents and post mortems.

Apache KafkaFlinkAWSKubernetesGrafanaPrometheus+4

Ing

Dev Engineer

Feb 2019 – May 2019 · 3 mos · The Randstad, Netherlands

Part of the Wholesale Banking Department.
Exposing Java metrics to internal monitoring tools.
Using Websphere to support java backend payment services.
Creating Dashboards for monitoring using Kibana, Elasticsearch and Prometheus.

JavaWebsphereKibanaElasticsearchPrometheusSoftware Engineering

Dexels

Software Engineer

Feb 2018 – Feb 2019 · 1 yr · The Randstad, Netherlands

Responsible for:
Developing https://github.com/Dexels/navajo and Navajo enterprise, Dexel’s open source framework that creates microservices and webservices in Java.
Maintaining Kubernetes, MongoDB and Kafka infrastructure.
Creating data thrifting and data transforming systems using Kafka, Kafka Consume/Produce, JavaRX, MongoDB and OracleDB.
Creating high read availability MongoDB schemas generated from OracleDB sources.
Creating CI/CD scripts and jobs using Jenkins and Python, for seamless code deployments.
Prototyping/Testing technologies to see if they fit Dexels infra (ReactJs, Node).

JavaKafkaMongoDBOracleDBJenkinsPython+2

Ipsoft

Cognitive Implementation (DevOps/ML) Engineer

Jun 2017 – Feb 2018 · 8 mos · Amsterdam Area, Netherlands

Responsible for:
designing the behaviour / logic of Amelia (IPsoft's AI)
developing / configuring software modules of Amelia
defining software requirements
scripting in Groovy, Python, JavaScript
classifier training and result evaluation
designing / implementing and maintaining MySql databases

GroovyPythonJavaScriptMySQLDevOpsMachine Learning

Kenotom - embedded software solutions

2 roles

Software Engineer and IT Technical Analyst

Oct 2016 – Jun 2017 · 8 mos · Thessaloniki, Greece

Developing DevKits for microprocessor programming for thermal installations and factories using C++, microPython, Javascript, HTML, css, Bootstrap and Backbone.js
Participating in requirements engineering, customer meetings, architecture reviews.
Defining test specification for AUTOSAR and ASIL (automotive industry).

C++microPythonJavaScriptHTMLCSSBootstrap+2