Symphony Anywhere

Senior Full Stack Developer (Node.JS)

Symphony Solutions is a cloud transformation company headquartered in Amsterdam, with offices in the Netherlands, US, Ukraine, Macedonia, and Poland. Symphony Solutions recently celebrated 10 years of continuous service, and we attract many people with our open, welcoming culture and Dutch-inspired environment.

We are a company with a difference as we maintain a strong ethical culture and keep company values at the level of interpersonal and client-oriented relationships. Our philosophy is to establish close and strong relations with every client, employee, and candidate to succeed in our main directions (e.g. PHP, Java, C#, C++, SAP, Salesforce/, iOS, Android, BlackBerry).

Customer & project description:

During the Covid crisis, there is an urgent need for quick testing with immediate results. The existing situation clearly indicated the arising need for testing facilities which are accessible, affordable, and allow people to get results in the matter of minutes, not days. This rapid testing is not only for the comfort of an individual who wants to get tested and go on with their life, but also allows eliminating the risk of asymptomatic Covid-19 carriers spreading further the virus, endangering people around them without even as much as suspecting it. Spoedtestcorona, a chain of testing centers offering rapid screening tests for Covid-19 to individuals as well as companies in the Netherlands and Belgium. The service provides an extremely reliable rapid Antigen test result within 15 minutes and quick PCR tests.

Spoedtestcorona has created a high available, scalable application where users can register, pay and select a timeslot for an appointment to get a Covid-19 speedtest. It is integrated with test labs software capable to update available time slots for testing, and an admin portal for test lab employees to enable them uploading the test results, minimizing human mistake factor, while keeping the high level of compliance and data security. Other integrations include all-Netherlands registration portal, CoronaCheck app for generating a digital test certificate, and a few more are coming.

Software solution consists of several platforms for different target audience (testing for travel, testing for access to events, testing for schools, etc.) with a registration portal, admin portal and a test scanning app.


  • Strong knowledge of Javascript (ES6)
  • Experience with Node.js (Express.js), REST API
  • Understanding of asynchronous development and data security principles
  • Understanding of the SOLID principles and GOF patterns
  • Familiarity with git
  • Ability to write readable, well-documented code

Will be a plus:

  • Experience with NoSQL databases (MongoDB or DynamoDB), understanding of their design principles
  • Knowledge of Web UI frameworks (Angular)
  • Experience with serverless and AWS ecosystem


Spoedtestcorona is looking for a full-stack developer capable of implementing new features, refactoring existing code and conducting investigations associated with 3rd-party software integrations.

We promise a friendly and talented team and a fascinating project!

We offer:

  • Competitive salary and compensation package
  • Medical insurance
  • Personal workstation
  • Friendly and professional team
  • Workation program
  • Symphony Training Academy
  • Low hierarchy and open communication
  • 20 vacation days
  • See BENEFITS Section for the full line-up
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