Anselm Hannemann - Freelance Frontend Lead Engineer & Architecture Consultant

Q: Where is Anselm based?

Anselm is based in Iffeldorf, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Anselm speak?

Anselm speaks the following languages: German (Native), English (Advanced), French (Elementary) .

Q: How many years of experience does Anselm have?

Anselm has at least 18 years of experience. During this time, Anselm has worked in at least 16 different roles and for 15 different companies . The average length of individual experience is 1 year . Note that Anselm may not have shared all experience and actually has more experience.

Q: What is Anselm's latest experience?

Anselm's most recent position is Freelance Fullstack Principal Developer at Fiberbase GmbH .

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

In recent years, Anselm has worked for Fiberbase GmbH , Jedox , Testo , Siedle , and Colloq .

Q: Which industries is Anselm most experienced in?

Anselm is most experienced in industries like Information Technology (IT) , Banking and Finance , and Advertising . Anselm also has some experience in Media, Entertainment and Publishing , Manufacturing , and Government and Public Administration .

Q: Which business areas is Anselm most experienced in?

Anselm is most experienced in business areas like Information Technology (IT) , Project Management , and Product Development . Anselm also has some experience in Marketing , Quality Assurance (QA) , and Operations .

Q: Which industries has Anselm worked in recently?

Anselm has recently worked in industries like Information Technology (IT) and Manufacturing .

Q: Which business areas has Anselm worked in recently?

Anselm has recently worked in business areas like Information Technology (IT) , Project Management , and Product Development .

Recommended expert

Iffeldorf, Germany

Experience

Jan 2026 - Present

2 months

Remote

Freelance Fullstack Principal Developer

Fiberbase GmbH

Working as a full-stack (next.js, Postgres) engineer and consultant to build the core platform with underlying services for location-based comparisons and requests. I’m working on performance optimization on all ends (esp. Postgres queries) and writing product specification and architecture of the platform with another colleague.

Jan 2025 - Jul 2025

7 months

Remote

Freelance Accessibility Lead & Frontend Engineer

Jedox

Helped teams with their frontend libraries and unified component library
Transitioned old external solutions into modern internal projects
Kicked off the accessibility compliance project for the first product
Coached developers and QA on accessibility, boosting performance, stability and happiness of the teams

Apr 2023 - Dec 2024

1 year 9 months

Remote

Freelance Scrum Master / Effectiveness Coach

Testo

Helped the Data Engineering team to be more effective building AI and various API products on time

Nov 2022 - Mar 2023

5 months

Remote

Freelance Frontend Architecture and Frontend Engineer

Testo

Organized and built the architecture, technology and workflow base for a new web application serving a global customer portal
Connected various products and APIs together
Technologies: React, TypeScript, Docker, Kubernetes
Automation: Continuous integration with GitHub Actions, CircleCI, TravisCI, GitLab CI, Jenkins 2

Aug 2022 - Feb 2023

7 months

Remote

Satellite Transformation Project Engineer

Siedle

Refactored an existing codebase into a modern, reliable and high-performance codebase
Solved ongoing performance problems with a web application used in the field by thousands of customers
Achieved a lean and robust solution seamless to use with no performance issues
Architecture: microservices, microfrontend
API design: REST, GraphQL
Coding conventions and guidelines: HTML, CSS (BEM, ITCSS), JavaScript
Performance-budget driven development

Jan 2019 - Mar 2020

1 year 3 months

Hybrid

Engineering & Delivery Manager

LaterPay

Helped two teams build valuable features prioritized for customer value
Coached team members in agile and technical skills
Ensured a safe work environment while enabling career growth and learning
Involved in hiring and HR department decisions
Tools and methodologies: remote working, Kanban, Lean, Scrum

Jan 2018 - May 2019

1 year 5 months

Frontend Architect & Developer

Adverma

Built two high-traffic websites serving millions of customers and data with a lean tech stack
Produced hand-crafted code and made smart decisions to solve complex problems
Responsible for the frontend part and the overall technical customer experience

May 2017 - Dec 2021

4 years 8 months

Co-founder and Developer

Colloq

Co-founded and created a social event management and knowledge discovery platform from scratch as a team of three
Built platform features and user interfaces
Managed agile driven development processes
Technologies: HTML, CSS, Sass, PostCSS, CSS-in-JS libraries, JavaScript, TypeScript
Shut down the project after four years due to lack of market relevance

Nov 2016 - May 2017

7 months

Front-End Developer

Greenpeace International

Architected the international set of websites for the organisation with a styleguide and custom tech framework on a WordPress Multi-Site basis
Used Scrum as work methodology
Responsible for frontend guidelines and codebase

Nov 2016 - May 2017

7 months

Medical Assistant and IT Manager

LMU University Clinic

Dec 2014 - Mar 2020

5 years 4 months

Front-End Consultant

LaterPay

Refactored legacy code and built new fast and scalable codebases with modern toolchains across three teams
Coached junior developers and audited other codebases for performance, scalability and accessibility issues

Jan 2014 - Oct 2014

10 months

Wireframe & Front-End Prototype Developer

Sahana Disaster Management Foundation

Developed wireframes and front-end prototypes for disaster management applications

Dec 2012 - May 2013

6 months

Front-End Developer

Vaillant Group

Built a global website system that scales and endures within a small team
Coordinated project and supervised two of four Scrum teams
Developed frontend components, test frameworks and infrastructure

Jan 2012 - Jul 2013

1 year 7 months

Front-End Developer

Hubert Burda Media / FOCUS Magazin Verlag

Developed front-end and tablet applications using HTML5 and CSS3
Acted as Adobe ambassador and expert on web standards
One of the first to implement responsive images and modern web features in production

Jan 2012 - Jul 2013

1 year 7 months

Front-End Architect

SAP Datacenter

Designed front-end architecture and development for the SAP Datacenter website in partnership with Hans-Christian Reinl and grasundsterne agency

Dec 2011 - Present

14 years 3 months

Freelance frontend developer & agile coach

Self-employed

Developed small to large-scale websites and web applications based on web standards like HTML, CSS, JavaScript, PHP, Node.js
Preferred vanilla web technologies and modern toolchains like React, Next.js, Vue, TypeScript
Provided consultancy to customers on frontend engineering and agile workflow optimization
Worked on various small website projects

Mar 2011 - Jan 2014

2 years 11 months

Freelance Advisor and Director for Web Technologies

2issue digital publishing GmbH

Helped developers start projects quickly by architecting and building digital magazines, apps and web experiences for clients like FOCUS Magazin and Adobe

Nov 2007 - Dec 2011

4 years 2 months

Founder

Self-employed

Founded a two-person design agency delivering corporate designs, websites and consultancy work for various clients
Transitioned business into sole freelance operation in 2011

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 Information Technology (18.5 years), Banking and Finance (5.5 years), Advertising (4 years), Manufacturing (3 years), Media and Entertainment (3 years), and Government and Administration (0.5 years).

Information Technology

Banking and Finance

Advertising

Manufacturing

Media and Entertainment

Government and Administration

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 (18.5 years), Project Management (14 years), Product Development (11 years), Marketing (4 years), Quality Assurance (0.5 years), and Operations (0.5 years).

Information Technology

Project Management

Product Development

Marketing

Quality Assurance

Operations

Summary

I have been developing websites and web applications since 2007 using standards-based technologies like HTML, CSS, JavaScript, PHP, and Node.js. I love working with Vanilla Web technologies but are absolutely routined in applying modern toolchains such as React, Next.js, TypeScript on a daily basis. My journey includes leading teams, optimizing agile workflows, and ensuring projects are scalable, accessible, and efficient.

I bring a deep understanding of both small-scale and global projects, emphasizing clear code, smart architectural decisions, and team coaching. With a long-term passion for frontend engineering, I focus on delivering reliable user experiences that meet real-world business needs.

Skills

Tooling / Workflow:

Git
Npm / Pnpm / Vite / Webpack / Composer / Esbuild / Swc
Docker, Kubernetes
Unit, Integration, And End-to-end Testing
Automation: Continuous Integration With Github Actions, Circleci, Travisci, Gitlab Ci, Jenkins 2

Architecture:

Microservice Structure
Api Design (Rest, Graphql)
Microfrontend Organization
Coding Conventions And Guidelines: Html, Css (Bem, Itcss), Javascript
Performance-budget Driven Development
Agile Driven Development

Development:

Html
Css, Sass, Postcss, Various Css-in-js Libraries
Javascript / Ecmascript / Typescript
Responsive Development (Includes On Device Remote Debugging And Testing)
Accessibility
Performance Optimization And Debugging

Project Management:

Remote Working (Also In Large Teams)
Kanban, Lean, Scrum (Prev. Certified Scrum Master)
Team Building

Languages

German

Native

English

Advanced

French

Elementary

Education

Jakob-Brucker Gymnasium Kaufbeuren

Abitur certificate (equals: high school diploma) · Kaufbeuren, Germany

Certifications & licenses

Certified Scrum Master

Scrum.org

Adobe Community Expert

Adobe Inc.

Profile

Created

February 2026

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Frequently asked questions

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

Where is Anselm based?

Anselm is based in Iffeldorf, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Anselm speak?

Anselm speaks the following languages: German (Native), English (Advanced), French (Elementary).

How many years of experience does Anselm have?

Anselm has at least 18 years of experience. During this time, Anselm has worked in at least 16 different roles and for 15 different companies. The average length of individual experience is 1 year. Note that Anselm may not have shared all experience and actually has more experience.

What roles would Anselm be best suited for?

Based on recent experience, Anselm would be well-suited for roles such as: Freelance Fullstack Principal Developer, Freelance Accessibility Lead & Frontend Engineer, Freelance Scrum Master / Effectiveness Coach.

What is Anselm's latest experience?

Anselm's most recent position is Freelance Fullstack Principal Developer at Fiberbase GmbH.

What companies has Anselm worked for in recent years?

In recent years, Anselm has worked for Fiberbase GmbH, Jedox, Testo, Siedle, and Colloq.

Which industries is Anselm most experienced in?

Anselm is most experienced in industries like Information Technology (IT), Banking and Finance, and Advertising. Anselm also has some experience in Media, Entertainment and Publishing, Manufacturing, and Government and Public Administration.

Which business areas is Anselm most experienced in?

Anselm is most experienced in business areas like Information Technology (IT), Project Management, and Product Development. Anselm also has some experience in Marketing, Quality Assurance (QA), and Operations.

Which industries has Anselm worked in recently?

Anselm has recently worked in industries like Information Technology (IT) and Manufacturing.

Which business areas has Anselm worked in recently?

Anselm has recently worked in business areas like Information Technology (IT), Project Management, and Product Development.

What is Anselm's education?

Anselm attended Jakob-Brucker Gymnasium Kaufbeuren.

Does Anselm have any certificates?

Anselm has 2 certificates. These include: Certified Scrum Master and Adobe Community Expert.

What is the availability of Anselm?

Anselm will be available part-time from February 2026.

What is the rate of Anselm?

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