# Rein Koch

Rein Koch is a remote worker on Himalayas, Senior Full Stack AI Engineer at Replika, based in Estonia.

Source: https://himalayas.app/@reinkoch

```text
Senior Data Architect at Replika who cut data pipeline processing latency from 42 minutes to 11 minutes.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Estonia |
| Authorized to work in | Estonia |
| Salary expectations | 40k+ EUR |
| Job categories | Data Architect, AI Engineer, Machine Learning Engineer, Software Engineer |
| Skills | Data Platform Architecture, Data Engineering, Lakehouse Architecture, Distributed Computing, Data ingestion pipelines, ETL, Data Warehouse Migration, DataOps, MLOps, Machine Learning, Generative AI, advanced analytics, Enterprise Analytics, Microservices, API Integration |
| LinkedIn | https://linkedin.com/in/rein-koch-029a22439 |

## About

```text
At Replika, I architected production AI data infrastructure using Python, SQL, Apache Spark, and Databricks patterns. I cut end-to-end processing latency from 42 minutes to 11 minutes by optimizing distributed pipelines.

I also designed data services supporting 3.2 million user profiles and established cloud-native architecture principles across AWS, Azure, and GCP. Automated CI/CD validation and deployment controls helped reduce pipeline-related operational incidents by 37%.

At Supersimple, I designed an enterprise analytics platform connecting machine learning services, structured data processing, and reporting. Its ingestion and transformation pipelines reduced average processing time from 28 minutes to 9 minutes.

Earlier, at Ready Player Me and the Estonian Defense Forces, I developed AI application services and secure enterprise software. Across these roles, I worked on data processing, production machine learning integrations, and scalable backend services.
```

## Experience

### Senior Full Stack AI Engineer

Replika. Jan 2024 - Oct 2026

```text
Architected production AI data infrastructure and distributed processing pipelines, improving latency from 42 to 11 minutes. Mentored 6 engineers and established architectural standards.
```

Skills: Python, SQL, Apache-Spark, PySpark, Databricks, Delta-Lake, AWS, Azure, GCP, DataOps, CI-CD, Machine-Learning, MLOps, Microservices

### AI/Machine Learning Engineer

Supersimple. May 2020 - Dec 2023

```text
Designed and implemented an enterprise analytics platform, reducing processing time from 28 to 9 minutes. Mentored 4 developers and established engineering standards.
```

Skills: Python, SQL, Apache-Spark, CI-CD, DevOps, Machine-Learning, MLOps, Data-Engineering

### AI Software Engineer

Ready Player Me. Jul 2017 - Apr 2020

```text
Developed data-intensive AI application services for digital identity and avatar experiences, improving processing latency from 3.6 to 1.4 seconds. Integrated machine learning components and established testing practices.
```

Skills: Python, SQL, Machine-Learning, API-Architecture, Backend-Development, Testing-Automation

### Software Engineer

Estonian Defense Forces. Sep 2013 - Jun 2017

```text
Developed and maintained secure enterprise software applications, reducing report generation time from 16 to 6 minutes. Implemented automated testing and release procedures.
```

Skills: Python, SQL, Relational-Databases, Testing-Automation, Software-Development

## Education

### Tallinn University of Technology

Master of Computer Science, Computer Science. 2008 - 2013

```text
Master of Computer Science degree from Tallinn University of Technology, completed in 2013.
```

## Tech stack

- Apache Spark
- Microsoft Azure
- PySpark
- Databricks
- JavaScript
- Python
- C#
- Scala
- SQL
- Delta Lake
- AWS

To contact Rein, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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