Job Description

Our true purpose at Castor

Castor is one of the leading platforms for data collection in medical research. We believe standardizing and reusing datasets is key to overcoming the healthcare challenges of the future.

How we operate

Our main Electronic Data Capture (EDC) application runs on a proven stack consisting of Ubuntu, Nginx, PHP and MySQL. For our cloud installations, we orchestrate these setups by using Terraform combined with Ansible for the server configuration management.

Due to the nature of processing medical data, we have clients in different regions across the globe, often with specific regulatory constraints around where and how their research data is stored. To meet these customer demands we combine both traditional as well as cloud-based hosting solutions.

Most of our clients prefer to run in Azure, but we’re using Google Cloud Platform for things like Kubernetes hosting of greenfield projects, blob storage for scalable file upload storage and their Key Management System (KMS) to further secure our data.

For our metrics we’ve begun standardizing on Prometheus and we’re moving towards Loki for log aggregation. We use PagerDuty for alerting, communicate via Slack and host our code on Github.

Why we’re growing our team

With our recent expansion have come new challenges, both in how we organize ourselves and in how we manage and scale our infrastructure in the future.

To further these efforts we have formed a Platform team consisting of SRE and Software Engineering, which we are now looking to grow with the addition of an additional SRE.

Additionally, due to the sensitive nature of medical data, Castor is certified for both ISO/IEC 9001 (quality) and 27001 (Information security). In addition, we have to adhere to a number of other regulations, including Good Clinical Practice (GCP) guidelines.

Our goal is to unite these requirements with emerging SRE practices around infrastructure as code and other principles to create a well designed and documented system, while still allowing us to remain flexible to change.

How you will contribute

Our absolute commitment to patient data security and privacy informs our vendor selection with certified datacenter and cloud providers. To achieve real impact in medical research, Castor needs to operate security around the world.

Historically, our production platform has run on top of managed hosting services. This model doesn’t scale well for our global, international footprint, which is why we are currently expanding our in-house knowledge and transitioning to Infrastructure-as-a-Service providers.

As a Site Reliability Engineer, you’ll have the ability to shape our operations and continuously deliver a working product. Working very closely with the development teams, you’ll collaborate in supporting and structuring our efforts around automation, observability and security. With your help we plan to scale the Castor platform to the next level.

Some things we worked on recently

Whilst there are many operational challenges as we continue to grow and scale at Castor, our Platform team has made great improvements to a variety of our systems already. To give you some examples of what we achieved last month:

• Migrated our DNS to AWS Route53
• Set up automatic documentation pipelines using MkDocs
• Moved our CI/CD pipelines from Jenkins to CircleCI
• Built a key-service on AWS Lambda to store disk encryption keys off-site for an otherwise region-local setup

Your background

You have helped run web-facing services under production workloads and have experienced the challenges that come with maintaining and scaling these systems. Making and owning decisions about systems architecture together with your team is something you enjoy and feel comfortable with.

Qualities we’re looking for include:

• A good grasp on how *NIX systems operate
• The ability to evaluate and implement best practices for IT operations
• A working knowledge of both cloud-native and traditional systems architecture and the trade-offs between them
• Experience with a configuration management framework such as Ansible, Chef, Puppet or SaltStack
• The ability and desire to work with a wide range of open source technologies
• A strong privacy- and security mindset
• Experience with some aspects of Observability and distributed systems: from monitoring, logging and metrics instrumentation to resiliency to failure
• A good understanding of how relational databases operate
• Experience with at least one programming or scripting language, preferably Python or Go(lang)
• Knowledge that a list of skills and requirements doesn’t mean you have to tick every single box to apply ;)

How we say thank you

At Castor we truly live our core values, believing we can achieve anything with a healthy and happy team. With this in mind, we offer the following benefits:

• Our own ‘Castor Burrow’ - brand new offices by Amsterdam Amstelstation
• A competitive salary plus an annual company bonus plan
• Employee Stock Option Programme incentive
• 30 days annual leave plus 6 public holidays
• An individual training and professional development budget
• Flexible working with the opportunity to work from home 1 day per week
• Meditation room with daily yoga, mindfulness and company subscription to Calm
• Lunch and healthy snacks in the office every day
• A new Mac or Dell laptop

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Job Description

At Stream we are looking for a Backend Software Engineer to join our Amsterdam team.

What you’ll be doing

Most of your day will be dedicated to software design, research and coding. Job duties include working on Stream’s core API technology and building high performance software. On typical projects you will have a lot of freedom and you will have enormous impact on making our API service faster, more scalable and more flexible.

You will add new features to the service and find ways to make the existing ones perform orders of magnitude faster. Our customers have millions of users and use Stream for mission critical features, such as showing content and exposing core functionality of their application. Building stable and reliable software is not just an option: as a member of the development team you will design and write state of the art software, follow best-practices, measure everything and be responsible for its deployment to production. You will also spend part of your time talking to our customers and help them to use Stream in their app.

Our tech stack

At Stream we use a wide collection of technologies to offer highly optimized and available features to our customers. Over the years we have experimented with different programming languages, frameworks, databases and libraries. Here’s a short list of the technology that we currently use. Don’t worry if you don’t master them all or if you don’t see your favorite tool or language: you will have the chance to be exposed to most and to convince us on expanding the list.

• Go, Python, NodeJS

• Django, Celery

• Cassandra, Postgresql, RabbitMQ

• AWS, Puppet, CloudFormation, Vagrant

• Grafana, Graphite, ELK

• Redis, Memcached

• RocksDB

Culture

Stream has a casual social culture, our team is very diverse and we all have different backgrounds. We are very focused, you will see us heads-down coding or drawing complex charts on whiteboards, but we also pop up to have a chat or play merciless games of ping-pong. When it comes to software engineering our culture is oriented towards ownership and quality: our goal is to deliver stable software.

Benefits

Stream employees enjoy some of the best benefits in the industry:

• Competitive salary and equity
• Healthy team lunches
  
• Chance to meet our team in Boulder
• Lots of great coffee, tea and snacks
• A team of exceptional engineers :)
• Opportunity and support to attend and/or present to industry related conferences and meetups
• Opportunity to work on OSS projects

Location

Our Amsterdam office is located in the TQ tech space in the heart of the city. It’s a fantastic building with all the amenities you’d expect. There’s a cafe, a shared lunch area and a sports room with table tennis, yoga and badminton.

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Job Description

At FindHotel, we discovered early that travel is the one thing that opens people’s minds to new ideas, cultures, and ways of thinking. Our team comes from a variety of countries and backgrounds, and share the same passion for traveling and discovering new worlds and unconventional ways of doing things. We’re a bunch of independent thinkers, always looking to challenge each other and get better at what we do.

Our mission is to get every traveller in the world the best accommodation deal. From adventure and backpacking to honeymoons and family vacations, we give travellers access to all the information and the available offers for their accommodation of choice. We’re a passionate and diverse team of amazing humans who value and respect each other. We’re spread between our HQ in Amsterdam and the countries our remote folks work from. We’re growing fast! In 2017 and 2018 we’ve been doubling our business year-over-year, and we’ve been helping one million customers in 2019 alone.

We are looking for a Senior Backend Engineer to join our team. If you are looking to join us remotely, we’ll need you to be located within UTC-4 to UTC+6 to reasonably overlap with your team members.

At our core, we build highly performant, scalable and reliable services and components. We work with modern technologies such as Go and Elixir - and, as we embrace the DevOps culture, our infrastructure-as-code in the cloud (AWS) is managed and run using tools like Docker, Jenkins, and Terraform. You will be a part of a squad of bright engineers with a passion for delivering great software, as well as team members from a broader range of disciplines - data analysts and scientists, product owners, UX experts, and marketing specialists.

What you will actually be doing / responsibilities

• Work in a team to solve challenging problems, integrating accommodation providers and building blazing-fast services that serve their data
• Identify bottlenecks and opportunities for improvements in terms of performance and code quality
• Help improving our infrastructure and scale it to support our continuous growth in a cost-effective way
• Support the growth of junior and intermediate engineers by coaching them in their daily tasks, as well as raising the bar of how things are done within both your team and the bigger engineering group

What can you expect at the beginning of this experience?

• In your first week, you will get acquainted to the squads, its codebase and the tooling, with the goal of shipping something to production and build confidence early on;
• In your first month, you will get to know more people from the other squads and disciplines, in order to understand the foundation of the business and the various bits it is made of;
• One quarter in, you will be effectively an active member of your squad and your teammates will fully count on you; you will have built meaningful relationships within the company and be comfortable discussing ideas, inside and outside of your squad’s scope; ideally, you will have presented a topic you are fond of in one of our internal knowledge sharing sessions and/or demoed some work the team did during our weekly all-hands meeting

Typical day activities

• Team sessions (with your fellow engineers and PO) to check data and brainstorm ways to improve several services performance and design scalable solutions
• Solve open issues that affect component infrastructure reliability
• Propose and discuss with fellow engineers efficient solutions for components and architectural design.

Requirements: Who we’re looking for

• You are used to work and think outside of the box, and not afraid to present unconventional ideas and solutions.
• You have at least 6 years experience in back-end development using a modern set up and tooling
• You have a great understanding of APIs, databases, data structures, queues, and all things back-end, with a strong passion for automation
• You have worked on a production system that was exposed to significant scale (whether traffic or amount of data) and you are excited by these kinds of challenges
• You have a sense of pragmatism, constantly finding the right balance between achieving technical excellence and delivering value to the end users
• You are flexible, curious, and data-guided in helping us decide what to work on next
• You engage with your team and all the engineering group actively, sharing knowledge and best practices in order to improve with them every day
• You have production experience working with AWS and you have taken care of CI / deployments / infrastructure in the past
• Production experience with Golang or Elixir is a big plus
• Experience with Terraform is a nice to have

What we offer:

• Challenging problems and tech to work on.
• Growth opportunities within the team and cross-functionally.
• An amazing team of curious and diverse personalities, with a passion for learning (everyone has access to an annual learning budget to attend conferences or courses).
• A growing Remote culture where you have a chance to deeply influence the way we work with each other.
• A competitive compensation package and Stock Appreciation Rights.
• Flexible time off (take as many holidays as you need) and a chance to work remotely - we measure results, not time spent at keyboard.
• Annual company retreat in some great location - check out our Mallorca trip in 2019
• Regular trips to Amsterdam’s HQ for remotes (depending on team priorities, 1-4 times a year)

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Job Description

Will you join us on a journey to disrupt the trillion dollar travel industry? We are looking for the best and brightest who share our passion for travellers, data, and product.

FindHotel believes travel is the one thing that really opens minds to new ideas, cultures, and ways of thinking. Our mission is to get every traveller in the world the best accommodation deal. From adventure travel and backpacking to honeymoons and family vacations, we deeply care so that every traveller can make the best informed accommodation choice at the absolute best conditions for every trip.

We are growing fast and looking for a Senior Backend Engineer to join us in becoming a global travel category leader.

We build highly performant, scalable services and components that power our product and provide our users with the best content and deals the accommodation industry has to offer. Scalability, reliability, and great performances are the core of what we build. We work with modern stacks (Go, Elixir, Node.js, Python) and, as we embrace the DevOps culture, our infrastructure-as-code in the cloud (AWS) is managed via tools like Docker, Jenkins, and Terraform.

Should you join us, not only you will get exposed to some bright engineers with a passion for delivering great software, you will also get the chance to collaborate with team members from a broader range of disciplines, including data analysts and scientists, product owners, UX experts, and marketing specialists.

What you will actually be doing / responsibilities

Work in a team to solve challenging problems, integrating accommodation providers and building blazing-fast services that serve their data Identify bottlenecks and opportunities for improvements in terms of performance and code quality Help improving our infrastructure and scale it to support our continuous growth in a cost-effective way Support the growth of junior and intermediate engineers by coaching them in their daily tasks, as well as raising the bar of how things are done within both your team and the bigger engineering group What a day in the office might look like

In the morning, you and your fellow engineers sit down with the Product Owner to discuss the performance of a not-so-fast API endpoint. Comparing the ideal performance to the data collected by our monitoring systems, you brainstorm together a few ideas of how to improve the service’s performance and design a scalable solution. After lunch, you jump onto an open issue and prepare a pull request that improves the infrastructure’s reliability for one of the most delicate components. Before the end of the day, you put together some ideas on how to improve another component’s design and organize an architecture review session with some engineers across teams to discuss the benefits and costs of your proposed solution.

Requirements Who we are looking for / requirements

You have at least 6 years experience in back-end development using a modern set up and tooling You have a great understanding of APIs, databases, data structures, queues, and all things back-end, with a strong passion for automation You have worked on a production system that was exposed to significant scale (whether traffic or amount of data) and you are excited by these kinds of challenges You have a sense of pragmatism, constantly finding the right balance between achieving technical excellence and delivering value to the end users You are flexible, curious, and data-guided in helping us decide what to work on next You engage with your team and all the engineering group actively, sharing knowledge and best practices in order to improve with them every day You have production experience working with AWS and you have taken care of CI / deployments / infrastructure in the past Production experience with Golang is a big plus Experience with Terraform is a nice to have

Perks & Benefits

Why join FindHotel?

Lots of chances to learn and grow – you’ll be surrounded by some of the brightest minds in the city, be part of a culture which values sharing knowledge every day and have a budget to attend conferences and develop yourself. A profitable company with fast growth and a great scale opportunity. A competitive compensation package + perks and benefits. (including Stock Appreciation Rights) Flexible time off (take as many holidays as you need) and chance to work remotely - we measure results, not time spent in the office. You will be part of a highly international team in a fun work environment. We value good food, and offer catered lunches from various cuisines.

Interview Process

You can read about our hiring process here: https://blog.findhotel.net/2019/05/the-hiring-process-at-findhotel/

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Job Description

The Role

As one of the fastest growing Online companies in Europe, we offer a unique opportunity for you:

Our team collaborates on solving some complex development tasks that result from our continually increasing numbers of sellers and buyers (15 million monthly visitors and rising!). We’ve already implemented localisations for various European countries and will be expanding even further, outside of Europe, in the near future. And that is why we need your help!

We want to expand our team by introducing even more expert knowledge. You will work on challenges around scale, microservice architecture and implementing new features in Product focused innovation teams in which Front-End developers, Back-End developers, a Designer, a Data Scientist, and a Product Owner all work closely together. We are driven by A/B-testing and automated testing, which allows us to do multiple releases per day on our high-traffic website.

You will work with Ruby on Rails, nginx, MySql, Redis, ElasticSearch, Javascript, React, and Git in an agile development team of 60+ developers (and growing). We have headquarters in both Assen and Amsterdam in The Netherlands.

Your Experience

• If you know Ruby, then great! If not, that’s no problem as long as you’re happy to learn it.
• Aside from this, we value people with excellent communication and collaboration skills
• A curious mindset.
• Solid understanding of software engineering principles, including some of the following: Data Structures, Microservices, API development, Databases, System design, A/B testing and data-driven feature development.

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Job Description

Please note: if you’re a recruiter or a development company, don’t waste your time contacting us. We are not interested for sure.

At Careibu we are aiming to build the best social care community by students in the world. We are looking for capable, creative developers who want to help us accomplish that goal.

About Careibu Careibu is all about social care. Through our platform, we connect students to people for help at home. Our students work as babysitters, home cleaners and elderly assistants. Careibu’s Dutch community consists of 32.000+ students and 13.000+ clients. In Juni 2018, we officially launched in the German market (Berlin). Our mission is to bring all generations in society together and provide students a social side job.

Careibu was founded in student accommodation by two sisters, Lotte and Anne. They have grown the business from their student rooms to a team of 13 people which continues to rapidly grow. Our head office is located in Amsterdam.

Things we are working on We’re still a small company with an even smaller development team (CTO, product owner, backend developer and 2 mobile developers). This means you will need to wear many hats in the beginning but it also means there are many interesting challenges ahead that you can specialise in if you like. Broadly we are: – Migrating from legacy platform which has some interesting challenges – Improving and expanding our iOS & Android applications

Our technology stack We still maintain a stack built in Angular 1 (web UI), PHP (backend) and MySQL (data), however we are incrementally migrating to a new technology stack based on a Golang backend with native mobile apps (Swift for iOS and Java for Android).

Since we develop, test, deploy and operate our systems, we do work with other technologies that automate such processes, like GitLab, GitLab-CI, Docker and AWS’s ECS & RDS.

You should apply if – You want to be involved in building a product that has a social impact – You’ve worked in GoLang or you are a senior backend dev willing and able to learn quickly – You don’t mind exploring our legacy PHP system & rebuilding functionality on our new platform – You like to also be involved in improving the devops aspects of our stack – Experience with any of AWS EC2 & ECS, Docker or JavaScript/NodeJS is a big plus – You have a proactive attitude and are not afraid of failing – You (want to) live in the Netherlands (remote is not possible) – You have a EU passport (we don’t provide visa’s)

You want to apply or you have any questions? Email Anne (anne[at]careibu.com).

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