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About Glimworm Beacons

Glimworm beacons is a co-operation between Glimworm IT of Amsterdam, and Tweetonig of Rotterdam and Sven-Erik Haitjema.

Glimworm and Sven-Erik Haitjema have had a great working relationship since 2011 when Sven worked on a prototype at Glimworm as his graduation project. Tweetonig and Glimworm met through their shared membership of the Amsterdam Internet Of Things meetup group where Tweetonig teach makers about design and mass production.

Below are the company and personal profiles:

Glimworm IT

Since 2000 Glimworm IT has been innovating with one goal in mind- make the web fast, easy and affordable for everyone. We began with Firefly, our own web content management system, building website and enabling organizations across industry sectors. Over the years have build a large client base from the very small to the very large who all have one need in common- a partner they can trust to help them communicate in a rapidly changing world.
Now we have the mobile web, smart phones, apps, big data and the Internet of things (IOT) and so we adapt, we change and grow, building new services and products that create value for ourselves our clients and the public. Weather it’s an award winning app like Vistory or ParkShark, a simple WordPress website or IOT innovations like the Heathy Life Lamp or iBeacons, we still have the same commitment- make technology work for everybody; solve big problems with simple and effective ideas and always- time and time again- make it fast, easy and affordable for everyone.

Jonathan Carter

Co-founder and Technical Director of Glimworm IT
After more than 10 years of innovative experience Jonathan was asked to join CMG’s prestigious Advanced Technology Department consulting for blue chip companies. Eventually, he shifted his attention to new media and created Glimworm, bringing his talents to the world of web development. With nearly 30 years in the industry his list of accomplishments is huge including everything from project management to robot building and he continues to keep on top of new developments by constantly evaluating emerging technologies.

Paul Manwaring

Co-founder and Creative Director
A former Hollywood Art Director, Paul shifted his focus from traditional to new media bringing unique insight into the creative process of software, web and app development and design. He has, along with his team at Glimworm, won several industry awards including the Gold Prize for Apps4nl, 2012.

Read more on our website (Dutch)

Sven-Erik Haitjema

Sven is a talented embedded systems engineer. He has worked a satellite currently orbiting earth, built creative solutions for marble tracks and now takes on the adventure of beacons.
As an Embedded Systems Engineer, he works with the latest developments that are at the heart most modern day devices.
Although a strong theoretical background is necessary, Sven enjoys working with 3d printers,
PCB mills and soldering irons, these are all tools that make it possible to convert theory into exciting practice

Read more on LinkedIn


Tweetonig is a multidisciplinair design office. Our work varies from industrial to hardware design. Everything, as long as we enjoy doing it.

Our masterplan is easy: Only fun things to do, for the rest of our lives. Only 1 problem, we enjoy doing too many things.

‘Tweetonig’ is a made up Dutch word. It translates literally to ‘duotone’, a variaton of the Dutch word “eentonig” which means monotonous and is often used synonymously to boring.
Thing we enjoy, and our clients enjoy us doing, are concept development, product design, prototype and best of all, prepare and escort mass production. As real engineers we always have things like “easy assembly”or “better for mass production” in our heads.

John Tillema

CONCEPT CREATOR and co-founder of Tweetonig
Dimer and he met during their Product Design study. Other than this, the two couldn’t be more different. This ADD firecracker and brainstormer always has some new ideas up his sleeve, and the enthusiasm to enroll those comes included.

Dimer Schaefer

CREATIVE ENGINEER and co-founder of Tweetonig
Creative engineer and co-founder of Tweetonig.
After his study as an Industrial Designer Dimer has worked in the field of injection molding.
Also parttime Jedi, adobe (illustrator) hooked, paintsplasher en general nice guy.

Read more on the website