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Senior Backend Developer (Ruby on Rails)

72% Flex
Remote: 
Full Remote
Contract: 
Full time
Experience: 
Mid-level (2-5 years)
Work from: 
Portugal

Offer summary

Qualifications:

Extensive experience in Ruby on Rails API development, Ability to work autonomously on high-loaded projects.

Key responsabilities:

  • Developing new features and internal algorithms
  • Optimizing and scaling services against fraud and security
Sweatcoin logo
Sweatcoin Scaleup https://sweatco.in/
51 - 200 Employees
About Sweatcoin
Sweatcoin is a global Top 10 Health & Fitness app that tracks physical movement, converting it into digital currency. The free app comprises movement-verification technology, gamification and a marketplace of exclusive offers and product deals that Sweatcoin can be redeemed for. Sweatcoin 4 Good also enables donation of the currency to good causes. With 100M+ Sweatcoin downloads, we are the fastest ever growing Health & Fitness app with 20M downloads this year alone, putting us at the top of 42+ countries' app stores as the most downloaded Health & Fitness app of 2022 to date. Since June 2021 we've worked with 1300+ brand partners providing the equivalent of $200 million of value in exchange for users' steps, increasing their walking by an average of 20%. In total our users have walked 23 Trillion steps. Sweatcoin is a rapidly-growing, profitable UK business and a global thought leader within health-tech. The business has collaborated with influential academics on research published in the British Journal of Sports Medicine into the success of incentivised behavioural change and worked with the NHS on a successful trial with pre-diabetic patients. (A trial that resulted in an 85% retention rate and average weight-loss per participant of 1.1kg). Covered by New York Times, CBS, Forbes, Fortune, Reuters, Huffington Post and others, Sweatcoin has raised capital from investors across the US & Europe, including Goodwater Capital, Greylock Partners, Justin Kan (founder of Twitch and Justin.tv) and Rain Lohmus (founder of LHV Bank). London-headquartered, with team members based across the world representing 22+ nationalities, it is the people that make Sweatcoin a special company and a great place to work. Our Purpose: To inspire a healthier planet by unlocking the value of movement Our Vision: A world where an open-economy of movement - of wealth through health - exists Our Mission: Create a global, new-generation* currency generated by physical movement
See more Sweatcoin offers

Job description

Logo Jobgether

Your missions

Sweatcoin is a London-based and well-funded scale-up with a team of 100 and the mission to make the world more physically active. Our iOS and Android apps have more than 100MM installs, 15M+ active users, more than 300 commercial partners and confirmed by the independent academic research ability to make our users up to 20% more active.


If you are interested in solving complex problems, then we are looking forward to seeing you be a part of our team! Now we have 160K requests per minute, half are writing, our database is growing by 1% per day, 5 million users a day send 15 million records, about 50 million requests to the database! In addition, you will work on the development of the new features for the project, work on improving internal algorithms, optimization/scaling of the service, protection against fraud and security, analytics, a / b testing and API projects. 


Who we are looking for:

  • Extensive experience in robust Ruby & Rails API design & development
  • Ability to carry unclear product requirements to stable, clear, deployed features
  • Ability to work autonomously, determining what needs to be done and why with little-to-no oversight (think managers of one)
  • Habitually ensuring new app behaviors are covered by specs to ensure stability
  • Experience working on high-loaded projects involving cross-functional collaboration
  • Ability to find a compromise between perfect code and fast delivery
  • English language not lower than Intermediate


Tech stack:

  • Ruby 3
  • Rails 7
  • Puma
  • PostgreSQL
  • Redis
  • Sidekiq
  • GCP & AWS


Why join us?

  • Remote-friendly & Flexible working hours. The flexibility is incredible, performance is based on output, rather than hours spent working, our core hours are (10:00-16:00 GMT)
  • Stock options after 12 months of employment (50% of Basic Salary)
  • Team building abroad in exciting locations!
  • Unlimited time-off policy
  • Two office locations, London and Lisbon, in case you'd like to work from the office sometime
  • Wellbeing program, (up to 2 counselling session per month)
  • Health Insurance, for our employees joining outside UK or PT you have a 1000€ yearly allowance.

If you feel that that’s a match we would be excited to have you on our team!

Required profile

Experience

Level of experience: Mid-level (2-5 years)
Spoken language(s):
English
Check out the description to know which languages are mandatory.

Hard Skills

Algorithm DesignRuby on RailsAPI ArchitectureDatabase ManagementFraud ManagementSecurityPostgresRedisGoogle Cloud Platform (GCP)Amazon Web Services (AWS)

Soft Skills

  • Clear Communication
  • Autonomous Working
  • Team Collaboration
  • Problem Solving
  • Adaptability
  • Attention to Detail
Are you interested?

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