Ask HN: Who is hiring? (May 2018)

Ravelin provides real-time fraud detection for online businesses. We analyse customer behaviour and transactions using proprietary data science and machine learning technologies, and work with merchants to provide extremely accurate fraud detection.

Our tech stack includes: Golang, GCP; NoSQL/BigTable; PostgreSQL; Zookeeper; ElasticSearch; Bigquery; distributed, highly available microservices; CI/CD and we use agile development practices. For more information see: https://syslog.ravelin.com/ravelin-technology-stack-1e957a46...

We are hiring for a number of Engineering Positions:

Senior Backend: https://ravelin.workable.com/j/55ADB73093

Fullstack (Mid/Senior): https://ravelin.workable.com/j/86F7A0B946

Devops (Junior/Mid): https://ravelin.workable.com/j/AF0D7439DE

VP Engineering: https://ravelin.workable.com/j/2F0648699E

https://lightning.engineering/

At Lightning Labs, we scale blockchains. Our current focus is the development and deployment of the Lightning Network[1], an open blockchain scalability protocol[2] primarily being developed for Bitcoin. Lightning allows for high volume, low fee, instant payments on top of Bitcoin. We strive to continually push the edge of innovation w.r.t blockchain scalability, advanced privacy-preserving smart contracts, and cryptocurrency UX. Amongst our team include applied cryptographers, the designers of the Lightning Network protocol, and several Bitcoin developers making key contributions to the open source Bitcoin eco-system such as roasbeef[3].

{Cryto Protocol Engineer || Distributed Systems Engineer}:

We're looking for an experienced software engineer well versed in applied cryptography, peer to peer networks, distributed systems, open source software collaboration, and cryptocurrencies. Your job description would include working on lnd[4] the most feature-complete implementation of the Lightning Network, neutrino[5] an advanced lite client operating mode for Bitcoin, conduct novel research into cryptocurrencies (and related areas), and helping to design the next generation of smart contract applications on Bitcoin.

{Frontend Developer}:

Our work on the second-layer of blockchains presents a number of UI/UX challenges as we lift traditional wallets to the next layer creating a new application platform on top Lightning. As a result, we're also looking for a frontend developer to build out the key applications, libraries, and tools for the masses to interact with Lightning. Our applications are built on React, React-Native, MobX and Electron, communicating with a Lightning daemon over a binary RPC protocol. Ideal applicants have experience building+shipping React-Native applications, and have also have experience maintaining open source projects.

You can contact me directly at jobs@lightning.engineering with some, or all of the following: link to your github account, resume, a brief cover letter detailing your past experience in the areas listed above, and some relevant work you've done.

[1]: http://lightning.network/

[2]: https://github.com/lightningnetwork/lightning-rfc/

[3]: https://github.com/roasbeef/, https://twitter.com/roasbeef

[4]: https://github.com/lightningnetwork/lnd/

[5]: https://github.com/lightninglabs/neutrino

Trakstar is looking for an experienced and versatile front-end developer to join us and become our in-house React expert in Seattle. We make performance reviews meaningful for employees, managers, and HR administrators around the world. Our rapidly growing customer base consists of over 135k users and 1,200 organizations.

Our stack: Ruby on Rails, Postgres, Backbone, jQuery, JavaScript, HTML, CSS. Looking to modernize our front-end work with React. We utilize Resque/Redis for background jobs, have an automated feature test suite driven by Capybara and PhantomJS on Circle CI, and run our own ops with AWS + Chef.

To apply, visit:

https://trakstar.recruiterbox.com/jobs/fk0fuud?source=hacker...

Full-stack opening, too!

https://trakstar.recruiterbox.com/jobs/fk0fqvh?source=hacker...

We use AI to help software engineers like you find great jobs. We’re looking for a talented full stack developer. You’ll work alongside a team of passionate developers who are working to flip hiring on its head.

Our technology challenges are vast: on the surface, we're iterating upon a two-sided web application that is unlike anything engineers and hiring managers have ever seen. Below, we're building a sophisticated, analytics-driven matching engine that uses structured and unstructured data to predict highly symbiotic working relationships. We use Angular, Flask, MongoDB, Redis, Kubernetes, and a healthy dose of Secret Sauce™ to make it all happen.

If you're interested, we’ll show you what it’s like to join a company where work is play and play is work. Together, we'll change how developers find work – forever.

We look forward to meeting you!

https://www.untapt.com/jl/5408df373702dd00085bc07b

Care/of is a health and wellness brand based in New York City. We provide honest guidance to help you personalize a pack of vitamins & supplements that's right for you, and send them to you in convenient daily packs. We produce our own line of supplements from the best quality ingredients, sourced from around the globe.

The company was founded in 2016 and closed its most recent round of funding in August 2017 with a $13.9M Series A lead by Goodwater Capital.

Crunchbase: https://www.crunchbase.com/organization/care-of

Open Roles:

- Mobile Engineer https://grnh.se/iamfmqt01

- Frontend Engineer https://grnh.se/k2v74c2v1

- Backend Engineer https://grnh.se/8g6we6171

Our Stack: Ruby on Rails, Node.js, React, Redux, React Native, GraphQL, PostgreSQL, Redis, Amazon API Gateway, AWS Lambda, Amazon DynamoDB, Amazon Kinesis, Amazon Redshift