Frank Bohnsack - Software Engineer

Q: Where is Frank based?

Frank is based in Berlin, Germany .

Q: What languages does Frank speak?

Frank speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Frank have?

Frank has at least 29 years of experience. During this time, Frank has worked in at least 6 different roles and for 4 different companies . The average length of individual experience is 4 years and 1 month . Note that Frank may not have shared all experience and actually has more experience.

Q: What is Frank's latest experience?

Frank's most recent position is Software Engineer at Freelancer .

Q: What companies has Frank worked for in recent years?

In recent years, Frank has worked for Freelancer and iWay AG .

Q: Which industries is Frank most experienced in?

Frank is most experienced in industries like Telecommunication and Information Technology (IT) .

Q: Which business areas is Frank most experienced in?

Frank is most experienced in business areas like Information Technology (IT) , Product Development , and Operations . Frank also has some experience in Project Management and Customer Service .

Q: Which industries has Frank worked in recently?

Frank has recently worked in industries like Information Technology (IT) .

Q: Which business areas has Frank worked in recently?

Frank has recently worked in business areas like Information Technology (IT) and Product Development .

Recommended expert

Berlin, Germany

Experience

Jul 2020 - Present

5 years 9 months

Berlin, Germany

Software Engineer

Freelancer

Freelance software engineer focusing on backend (Python/Django) and frontend (VueJS).

Jan 2019 - Present

7 years 3 months

Zürich, Switzerland

Lead Software Engineer

iWay AG

As a Lead Software Engineer, I lead a team of internal and external software developers.
My main focus is on the backend. This includes REST APIs, middleware, and data migration.
We mainly use Python and its frameworks like Django, DRF, Starlette, or FastAPI.
I also feel at home in JS frontend systems like Vue or ExtJS.

Jan 2017 - Dec 2018

2 years

Zürich, Switzerland

Software Engineer

iWay AG

As a software developer, I was responsible for developing and maintaining internal software.
This includes customer backends and various REST backends for internal services (e.g., internal customer portal, gateways to SwissCom Fiber/xDSL ordering, VoIP provisioning, etc.) and databases.
We mainly used Python, Django, UWSGI, Nginx, and Celery/Redis.
I was also in charge of migrating and integrating the systems of the acquired deep AG.

Apr 2013 - Dec 2016

3 years 9 months

Chur, Switzerland

Operations Engineer

deep AG

As an operations and software engineer, I was responsible for running internal and customer infrastructure.
This included services like mail, DSL/RADIUS, DNS, and hosting, as well as setting up and maintaining hardware, and implementing and adapting software.
I was responsible for developing and maintaining internal software, including the billing and provisioning system and network and system monitoring.
90% of my work was spent completely redeveloping the entire infrastructure. This included migrating all ISP services like DNS, web, mail, RADIUS, and implementing a REST API for each service.
The old Java/Perl based customer/service management system was completely reimplemented (Django+DRF/ExtJS) and migrated.

Jan 2008 - Mar 2013

5 years 3 months

Dortmund, Germany

Software & Product Development Engineer

Verizon Business

Analysis of business processes as well as project leadership and management roles in various projects with distributed international teams.
Development and maintenance of internal software, including mail systems, billing systems, VoIP infrastructures, network monitoring, configuration, and various order, pricing, and provisioning systems.
Development of various products as SOA architectures on application servers like Tomcat and IBM WebSphere.
Use of databases Oracle (versions 8, 9, 10), PostgreSQL, and MySQL.
Operation of internal applications on web server farms with Apache and Tomcat.
Development in Python, Perl, Java, C, and PHP.
Development of applications to support troubleshooting and 24x7 operation of complex SOA architectures.
Products: resale DSL, VoIP, email, web hosting, and custom solutions such as network and VoIP reporting for Daimler.
Development of software for router configuration (BGP) from RPSL data from RIPE, ARIN, APNIC, etc., in Python.
Development of strategies to identify bot networks based on NetFlow data.

Sep 1999 - Dec 2007

8 years 4 months

Dortmund, Germany

Internet Backbone Engineer

Verizon Business

Planning, expanding, and operating the MCI EMEA backbone (Cisco and Juniper hardware).
Developing software for network validation and backbone network configuration.
Internet routing and analysis of NetFlow traffic data.
Providing third-level support for the EMEA Network Operations Center, including 24x7 on-call duty.

Jul 1997 - Aug 1999

2 years 2 months

Internet Installation Engineer

Verizon Business

Installing and supporting customer connections (dial-up and leased lines).
Automating ordering and provisioning processes.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Telecommunication (19.5 years) and Information Technology (18 years).

Telecommunication

Information Technology

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (28.5 years), Product Development (16 years), Operations (14 years), Project Management (5 years), and Customer Service (2 years).

Information Technology

Product Development

Operations

Project Management

Customer Service

Skills

With Over 25 Years Of Experience In Software Development, I See My Strengths Mainly In Designing And Implementing Modern And Demanding Web Applications And Backends. I Place Great Importance On Clean, Readable, And Reusable Code, Automated Tests, And Smooth Integration.

Programming Languages: Python, Javascript, Perl
Frameworks: Django, Drf, Flask, Extjs, Vuejs
Software / Tools: Mysql, Postgresql, Mssql, Oracle, Redis, Uwsgi, Celery, Ansible, Sentry, Github, Gitlab, Jira, Confluence, Elasticsearch, Kibana, Debian, Centos, Cloudlinux

Languages

German

Native

English

Advanced

Education

Oct 1994 - Jun 1997

University of Applied Sciences Stralsund

Diploma Engineer (FH), Computer Engineering · Computer Engineering · Stralsund, Germany

Oct 1991 - Jun 1994

University of Rostock

Computer Science · Rostock, Germany

Oct 1990 - Jun 1991

Wismar University of Applied Sciences

Subject-specific university entrance qualification · Wismar, Germany

...and 2 more

Profile

Created

October 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Frank based?

Frank is based in Berlin, Germany.

What languages does Frank speak?

Frank speaks the following languages: German (Native), English (Advanced).

How many years of experience does Frank have?

Frank has at least 29 years of experience. During this time, Frank has worked in at least 6 different roles and for 4 different companies. The average length of individual experience is 4 years and 1 month. Note that Frank may not have shared all experience and actually has more experience.

What roles would Frank be best suited for?

Based on recent experience, Frank would be well-suited for roles such as: Software Engineer, Lead Software Engineer, Operations Engineer.

What is Frank's latest experience?

Frank's most recent position is Software Engineer at Freelancer.

What companies has Frank worked for in recent years?

In recent years, Frank has worked for Freelancer and iWay AG.

Which industries is Frank most experienced in?

Frank is most experienced in industries like Telecommunication and Information Technology (IT).

Which business areas is Frank most experienced in?

Frank is most experienced in business areas like Information Technology (IT), Product Development, and Operations. Frank also has some experience in Project Management and Customer Service.

Which industries has Frank worked in recently?

Frank has recently worked in industries like Information Technology (IT).

Which business areas has Frank worked in recently?

Frank has recently worked in business areas like Information Technology (IT) and Product Development.

What is Frank's education?

Frank holds a Bachelor in Computer Engineering from University of Applied Sciences Stralsund.

What is the availability of Frank?

Frank is immediately available for suitable projects.

What is the rate of Frank?

Frank's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.