Job Description you will be filling the role of our Front-end (data) developer in a design environment. Your primary mission will be to understand our business needs and product requirements and transform that understanding into user-focused and intuitive products, interfaces, platforms for mobile and web in the field of data. Responsibilities Since you will be working closely with our product managers, marketers, designers, strategists, analysts and other key stakeholders, you must be a team player. Your tasks will include the creation of experience maps, user scenarios, mockups and flows and integrating existing design into fluid front-end experiences. Other tasks will include: Validating ideas and designs using split A/B tests and product performance. Collaborating and communicating professionally with clients and internal teams. Designing user-experiences from low-fidelity sketches to hi-fidelity pixel perfect mockups. Measuring recently released product features to establish benchmarks and to identify potential areas of improvement. Staying abreast of UX trends and looking for creative ideas and inspiration in parallel analogous worlds. Developing interactive reporting dashboards and different types of visualizations. Creating rapid prototypes to validate design concepts with stakeholders and customers. Highly detailed communication of design principles + direction, as well as design specifications to engineersRequirements and Experience (must haves)Perfect Engels;Knowledge of open standards;Experience with data driven projects or services;D3.JS experience or related experience in datavis field;Being able to integrate JSON;Open-source enthousiast;ES6, GIT, GithubA minimum of two years of UX or interaction design experience; experience with responsive Webdesign and frameworks that incorporate strong grid principles, such as Bootstrap.Proven well-designed examples of responsive grid-based layouts. Strong work portfolio that demonstrates systematic and creative design thinking as well as a deep understanding of UI/UX best practices.Strong ability to recognise and predict use cases and user interaction, including happy path as well as edge and corner cases, and incorporate them into designs.Excellent verbal and written communication skills (the ability to effectively sell an idea).Deep understanding of information design / architecture, gestalt principles, (and user psychology).Ability to manage time wisely across projects and competing priorities, meet agreed upon deadlines, and be accountable for work.Proficiency in graphic design, motion graphics, digital art, a sensitivity to typography, color, layout, and a general awareness of materials/textures.Experience in working with a cross-functional team or lat-scale software development lifecycle, including agile methodologies. Nice to haves:Node.js.React.Experience with Docker / Kubernetes.Phantom.js or Nightwatch.jsYou see the advantages of documenting requirements and specifications; Our offerFrom day one, a competitive salary and good benefits;Salary depending on experience & skills;Development and career opportunities within the organisation;Hackathons and Techdrinks;8% holiday allowance;Education expenses;25 holidays;Contract: for 6/12 months;Location: Amsterdam, The Netherlands. Company profile We provide open data visualisation solutions for organisations working on aid transparency and accountability within the humanitarian sector. We have developed the open-source data-engine OIPA (https://www.oipa.nl/home) which enables raw XML files to be transformed into a normalised datastore, enabling our clients and partners to access over USD100 billion of development aid data annotated in the IATI XML Standard (http://iatistandard.org/ ). Using our bespoke Data Toolkit IATI Studio (https://www.iatistudio.com/ ) normalised XML can be accessed for visualising, analysing and comparing IATI data. We provide solutions to UNESCO, UN-Habitat, the UK and Dutch Government.