Handcrafted Data & AI Solutions

I build data and AI systems the way craftsmen build fine tools — precise, durable, and built for real work.

Digital workshop with data engineering tools

DaiTA-Crafter — Precision Meets Purpose

I'm Sven Bohnstedt, a data engineer who treats code like craft.

I design, build, and maintain solid data systems — pipelines, warehouses, and AI workflows — that keep running when others fall apart.

My approach is simple: no noise, no over-engineering, no shortcuts. Just clean architecture, automation that saves time, and solutions built to last.

Whether it's Navision integration, large-scale Azure deployments, or custom Python frameworks, I bring structure, reliability, and a craftsman's eye for detail.

PythonSQLPostgreSQLAzuredbtDockerLangChainLLM AutomationPower BI

Featured Projects

Selected projects that demonstrate the craft behind solid data engineering and AI — built with precision, tested in production, and made to last.

Role

Lead Data Engineer & Project Manager

Stack

SQL Server · Python · Navision (BC) · Azure · Power BI · CCV Integration

Scale

4 connected sites, 20+ sources

Outcome

A robust, transparent, and maintainable DWH foundation — crafted for reliability, not hype.

Multi-Site Production DWH Modernization

Lead Data Engineer & Project Manager

SQL Server · Python · Navision (BC) · Azure · Power BI · CCV Integration

Led the complete redesign and modernization of the Data Warehouse architecture for a European industrial manufacturing group operating multiple production facilities across different sites.

Established a unified data platform connecting Navision/Business Central ERP instances via standardized STOP exports and custom Python-based ETL layers. Built interfaces for CCV and local operational systems to ensure consistent, traceable data across all production environments.

Developed an in-house Python monitoring framework for real-time process tracking, error logging, and performance metrics across the entire production chain.

The system now powers four downstream reporting modules, including a board-level Power BI suite for management and financial control.

Outcome: A robust, transparent, and maintainable DWH foundation — crafted for reliability, not hype.

Role

Solution Architect & Developer

Stack

Azure Synapse · Data Factory · SQL · Python · Power BI

Key Result

60% faster processing cycles, simplified maintenance, scalable architecture

Azure Synapse Migration

Solution Architect & Developer

Azure Synapse · Data Factory · SQL · Python · Power BI

Planned and executed the migration of a legacy SQL-based DWH to Azure Synapse for a manufacturing client.

Designed modular pipelines with parameter-driven transformations and CI/CD automation. Added monitoring and cost optimization, ensuring transparent, scalable architecture.

Outcome: 60% faster processing cycles, simplified maintenance, and a solid base for predictive analytics.

Role

Data Architect & LLM Integration Engineer

Stack

Python · MQTT · InfluxDB · Grafana · FastAPI · Azure IoT

Key Result

Real-time telemetry, predictive maintenance, reduced downtime

Sileo e-Bus Battery Monitoring

Data Architect & LLM Integration Engineer

Python · MQTT · InfluxDB · Grafana · FastAPI · Azure IoT

Built a live telemetry system for an electric bus fleet. Integrated IoT sensor streams, structured high-frequency data in InfluxDB, and exposed clean APIs through FastAPI.

Implemented Grafana dashboards for real-time performance and anomaly detection, plus LLM-based summaries for maintenance teams.

Outcome: Transparent, data-driven fleet management with reduced downtime and predictive maintenance.

Code as Craft

Craftsmanship isn't art for art's sake. It's the pursuit of clarity and longevity in every line of code.

I build systems that others can understand, maintain, and extend — because good work should outlast its maker.

From ETL orchestration to model automation and LLM integration, every solution follows one principle: precision, transparency, and reliability.

Let's Build Something That Lasts

Sven Bohnstedt

Data Architect & LLM Integration Engineer

I collaborate with teams who value clarity, craftsmanship, and measurable results.
Fill out the form below to start the conversation — no automated bots, just direct contact.

contact@daita-crafter.com

Phone

+49 151 589 42617

Location

Eimsbütteler Str. 10
20255 Hamburg

DaiTA-Crafter

Handcrafted Data & AI Solutions

Data + AI + Craftsmanship

(pursuant to § 5 German Telemedia Act – TMG – in conjunction with § 55 (2) German Interstate Broadcasting Agreement – RStV – and Art. 14 (1) ODR Regulation)

Provider identification and person responsible for content:

Sven Bohnstedt

Trade name / company name:

dAIta Crafter — Handcrafted Data & AI Solutions

Legal form:

Sole proprietorship

Address:

Emkendotfstraße 10

22605 Hamburg

Germany

Contact details:

E-mail: contact@daita-crafter.com

Phone: +49 (0)151 58942617

Person responsible for content pursuant to § 55 (2) RStV:

Sven Bohnstedt

(Emkendotfstraße 10, 22605 Hamburg)

VAT identification number:

No input tax deduction as small business pursuant to § 19 German VAT Act (UStG)

Professional regulations:

No chamber or professional licensing required. The general statutory provisions of the German Civil Code (BGB), Commercial Code (HGB) and Telemedia Act (TMG) apply.

Information on Online Dispute Resolution (Art. 14 (1) ODR Regulation):

The European Commission provides a platform for online dispute resolution (ODR platform), which can be accessed at the following address:

https://ec.europa.eu/consumers/odr

I am neither obliged nor willing to participate in a dispute resolution procedure before a consumer arbitration board (§ 36 (1) no. 1 German Consumer Dispute Resolution Act – VSBG).

Liability for own content (§ 7 (1) TMG):

As a service provider, I am responsible under § 7 (1) TMG for my own content on these pages in accordance with general laws. However, I do not assume any warranty for the accuracy, completeness or up-to-dateness of the information provided, unless intent or gross negligence is involved.

Liability for links (§§ 8–10 TMG):

This website contains links to external third-party websites, over whose content I have no influence. I therefore accept no liability for such external content. The respective provider or operator of the linked pages is always responsible for their content. The linked pages were checked for possible legal violations at the time of linking. No illegal content was identifiable at that time. However, permanent monitoring of the linked pages is not reasonable without concrete evidence of a legal violation. Upon notification of violations, I will remove such links immediately.

All content and works published on this website (texts, images, graphics, audio, video and animation files as well as their arrangement) are subject to German copyright law (UrhG). Any duplication, processing, distribution or any form of commercialization beyond the limits of copyright law requires the prior written consent of the respective author or rights holder (§ 19a UrhG). Downloads and copies of this site are permitted only for private, non-commercial use. Where content has not been created by the operator, the copyrights of third parties are respected. In particular, third-party content is identified as such. Should you nevertheless become aware of a copyright infringement, please inform me accordingly. Upon notification of violations, I will remove such content immediately.

Last updated: November 13, 2025

(in accordance with Art. 13, 14 GDPR in conjunction with § 25 German Data Protection and Privacy in Telecommunications and Telemedia Act – TTDSG – and TMG)

1. Name and contact details of the controller (Art. 13 (1) lit. a GDPR)

Controller within the meaning of the GDPR:

Sven Bohnstedt

dAIta Crafter — Handcrafted Data & AI Solutions

Emkendotfstraße 10

22605 Hamburg

Germany

E-mail: contact@daita-crafter.com

Phone: +49 (0)151 58942617

No data protection officer has been appointed, as the legal requirements under Art. 37 GDPR in conjunction with § 38 German Federal Data Protection Act (BDSG) are not met.

2. Purposes and legal bases of data processing (Art. 13 (1) lit. c GDPR)

Processing activity	Purpose	Legal basis	Storage duration
Server log files (IP address, browser type, referrer URL, date/time, requested file)	Ensuring system security, defense against attacks, error diagnosis	Art. 6 (1) lit. f GDPR (legitimate interest in technical security and functionality)	Automatic deletion after 7 days
Contact form / e-mail contact (name, e-mail address, subject, message, any further voluntary information)	Processing your inquiry, possible contract initiation or performance	Art. 6 (1) lit. b GDPR (pre-contractual measures / contract performance) or Art. 6 (1) lit. f GDPR (legitimate interest in communication)	Until the inquiry is fully processed, then deletion (unless statutory retention obligations apply, e.g. § 147 German Fiscal Code – AO, § 257 German Commercial Code – HGB)
Umami Analytics (self-hosted, no cookies, no personal data, anonymized statistics)	Analysis of website usage to optimize content and user experience	Art. 6 (1) lit. f GDPR (legitimate interest in improving the web offering)	Data stored anonymously and not linked to personal data; no automatic deletion period as no PII is involved
SSL/TLS encryption	Protection of transmitted personal data	Art. 6 (1) lit. f GDPR (legitimate interest in data security)	Ongoing during use

3. Recipients or categories of recipients (Art. 13 (1) lit. e GDPR)

Hosting service provider (technical operation of the website): Processor pursuant to Art. 28 GDPR with registered office in the EU.
Umami Analytics: Self-hosted on own server in Germany (no third-party provider, no data transmission).
No disclosure to third parties for advertising or other non-essential purposes.
No transfer to third countries outside the EEA.

4. Your rights as a data subject (Art. 13 (2) lit. b–d GDPR)

You have the following rights with respect to your personal data:

Right of access (Art. 15 GDPR)
Right to rectification (Art. 16 GDPR)
Right to erasure ("right to be forgotten") (Art. 17 GDPR)
Right to restriction of processing (Art. 18 GDPR)
Right to data portability (Art. 20 GDPR)
Right to object (Art. 21 GDPR) – in particular for processing based on Art. 6 (1) lit. f GDPR

To exercise your rights, please contact me informally by e-mail at: contact@daita-crafter.com.

5. Withdrawal of consent (Art. 7 (3) GDPR)

If processing is based on your consent (currently not the case, as Umami operates without consent and without cookies), you may withdraw it at any time with effect for the future. The lawfulness of processing carried out prior to withdrawal remains unaffected.

6. Right to lodge a complaint with a supervisory authority (Art. 13 (2) lit. d GDPR)

You have the right to lodge a complaint with a data protection supervisory authority regarding the processing of your personal data. The competent authority is:

The Hamburg Commissioner for Data Protection and Freedom of Information

Ludwig-Erhard-Straße 22, 7th floor

20459 Hamburg

Phone: 040 / 428 54 – 4040

E-mail: mailbox@datenschutz.hamburg.de

7. Obligation to provide data (Art. 13 (2) lit. e GDPR)

The provision of your data is neither required by law nor by contract. However, without providing your name and e-mail address, I will not be able to process your inquiry.

8. Automated decision-making / profiling (Art. 13 (2) lit. f GDPR)

No automated decision-making including profiling takes place.

9. Cookies and tracking – Umami Analytics (self-hosted)

Umami is an open-source analytics tool that is fully self-hosted (server location: Germany).
No cookies, no fingerprinting techniques, no storage of IP addresses or personal data.
Only anonymized usage data is collected (e.g. page views, dwell time, referrer – all aggregated and non-traceable).
No cross-page tracking, no profiling.
Processing takes place without consent requirement pursuant to § 25 (2) no. 2 TTDSG, as no personal data is processed.
No opt-out required, as no individual data is stored.

10. Technical and organizational measures (TOMs)

TLS 1.3 encryption (HTTPS) on all pages
Regular security updates of server and software
Access controls (password, two-factor authentication)
Backup strategy with encrypted storage
Umami database: Only anonymized data, physically separated from personal data

11. Right to amend

This privacy policy will be updated in the event of material changes to processing activities or new legal requirements. The current version is available on this website.

Last updated: November 13, 2025