Position title
Senior Full Stack Developer

Join in on the fun as a senior full stack developer

We’re looking for a mid-senior full stack developer - leaning towards the backend - to join our tight-nit development team as we scale up our operations.

Working at GreenJinn - We're transforming how shoppers interact with brands to create the next generation of mobile couponing. GreenJinn’s free cashback app allows grocery shoppers to save money on customised product options and inspires them to live healthier. GreenJinn is an award-winning, rising star in the London startup scene, backed by top retail experts. Launched at the end of 2016, the app has over 300,000 users, saving £120+ monthly and is targeting growth among 11.5m UK Millennials, with ambitious targets to reach over 1m users by the end of 2019.

GreenJinn also serves as a one-to-one marketing tool for brands, who often struggle to reach out to modern consumers through traditional marketing channels. We aim to provide them with unique insights into shopping patterns and trends, and a platform for detailed targeting of coupons.

Through GreenJinn, our ambition is to provide our community of mindful shoppers with the opportunity to have an end-to-end shopping experience at their fingertip.

After attending the Iceland Innovation Lab, GreenJinn has begun integrating partner supermarkets’ e-commerce activities on the app.


The ideal person for this role is a problem-solver with an inquisitive and innovative mind, who loves to collaborate with our wider team to drive the company forward.

Your role will allow you to work on a greenfield project where your creativity will express itself in setting standards and choosing the direction for this project to translate the business’ vision into code.

Your first challenge will consist of creating and deploying a complete new stack to replace our old PHP monolith applications. You will work closely with our lead developer to architect a scalable and maintainable solution. The technologies are not set in stone and you can have an impact on it if you're up to it. We are looking for someone that is independent and could take ownership of their projects.

As full stack developer, you will participate in our product development from ideation to deployment and beyond. You will closely interact with the mobile team and with the business to create groundbreaking new features for our users and brands and work with our data team to make our product smarter and more intuitive to use.

Your main challenges will be to bring our database up to the best industry standards and help in the transition to a more flexible architecture that handles our users’ preferences, the prediction of their purchasing patterns and optimises the offers they visualise.

  • At least 3-5 years commercial software development experience
  • Deep understanding of Javascript language and NodeJS framework
  • You can develop complex frontend applications using either React, Angular, Vue or any other framework
  • You feel at home working in a test-driven, agile team
  • You can write efficient SQL queries

Nice to have's:

  • You know what GraphQL is
  • You use TypeScript or Flow
  • Experience with serverless development
  • Good understanding of RabbitMQ or similar message broker protocol
  • NoSQL, ElasticSearch or any other database experience
  • AWS Lambda
  • Rust or Golang experience
  • Passion for food and improving people’s daily life
Job Benefits

We offer a creative, inspirational environment with an awesome office, surrounded by young, highly motivated individuals.

Employment Type
Full time
Job Location
Central London , Workspace (Kennington Park)
£ Competitive compensation and stock options package, compared to the top standard of London tech companies. Additional stock options based on outstanding results.
Date posted
15 October 2019
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Position: Senior Full Stack Developer

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