Senior Python Engineer | Commercial Data

London (Central), London (Greater) (GB)
21 Jul 2021
21 Aug 2021
Contract Type
Full Time

Lyst is the definitive fashion shopping website and app, used by over 150M shoppers a year to discover and buy fashion. More than 8.5M products from over 15,000 brands and stores can be accessed through our website and app, offering shoppers convenience and unparalleled choice.

We work in small, self-managing, autonomous teams with end-to-end responsibility for a specific customer-focused project. This structure brings together Lysters from all the disciplines that are needed to deliver the squad's goals. We reward these squads for the impact they make and value the innovative approaches that autonomy and alignment can bring. We hire great people and get out of their way.

We are looking for a Senior Software Engineer to join the Commercial Data team who can help us build microservices and pipelines that process and serve all the data relating to our partners, fashion brands and other commercial agreements.

As a Senior Software Engineer on the Commercial Data team, you’ll have the opportunity for impact by building and maintaining some of the core services that power Lyst.

What will you be working on?

Microservices: Maintaining and extending multiple microservices to ensure the data we need to power our website and app are gathered and served in a timely and scalable manner
Data pipelines: Ensuring all relevant data is correctly stored in our data lake, and transforming the data into forms suitable for consumption by other teams
Admin tools: Creating tools to allow manual updates and curation of our data
Analytics, Reporting and Monitoring: Creating reports and dashboards to monitor the health of both our data and our systems
Mentoring: Helping more junior engineers grow technically in their roles
We work mainly in Python, running on a range of AWS technologies such as S3, ECS, SQS, Glue, and Postgres RDS, along with non-AWS tools such as Snowflake, CircleCI, Docker and Github
We have high engineering standards and practice comprehensive testing, code reviews, continuous integration and continuous deployment across all engineering teams

Communication: You are able to communicate clearly and be humble when sharing ideas with everyone on the team
Commitment to quality: You strive to write code that is readable by everyone, well tested and robust in production
Motivation: You understand and are motivated by the challenge of building scalable, reliable distributed systems
Experience with data processing in the cloud: You have experience working with large amounts of remotely hosted data and developing tools and infrastructure needed to process this
You will also be experienced using traditional relational databases (e.g. Postgres) and have good intuition for how to write efficient SQL queries
You will have excellent Python knowledge and experience and be up to date on best Python practices
Bonus: You have experience using PySpark/Spark

Things that matter to us:

You are pragmatic and you like engaging with hard engineering problems
You like all things about data, passing it around, parsing it, storing it and reporting on it
You are curious at heart and like to take ownership of something to make it better
You are a team player and communicate with your peers and other stakeholders in the company on a day to day basis
Being confronted with a difficult or strange problem makes you feel like a detective that wants to crack the mystery
You enjoy nurturing your colleagues and empowering the team to the fullest of their abilitity


  • Flexible working: Our flexible working approach offers a high degree of freedom and autonomy. Individuals are provided with the discretion to work remotely on a regular basis, with an expectation that a reasonable proportion of time is spent in the office to enhance in-person collaboration.
  • You get 29 days' time off throughout the year to take a well earned rest, in addition to the 8 public bank holidays
  • The Lyst Clothing Benefit. We're a fashion company so we'll give you £250 to spend on the site in Year 1, £500 in Year 2, £750 in Year 3 and £1000 from Year 4 onwards. You're going to look fantastic!
  • Private Healthcare by Vitality. Your health is important to us which is why we offer all employees a comprehensive healthcare scheme from the day that you start.
  • Conferences and events. We’re big on learning, so all Lysters are allocated an individual training & development budget of £1,000.
  • Enhanced family leave entitlements for both parents and carers
  • Discounted eye tests and glasses
  • Team meet-ups, social events, sports and exercise events
  • Cycle-to-work scheme
  • Transport season ticket loans

Diversity and inclusion is an integral part of our culture. We recognise and celebrate the value and impact diversity brings to our company and are committed to ensuring this is a consistent focus, for which we are held to account. We are committed to treating all applicants fairly and equally, and encourage candidates from all backgrounds to apply for this role.

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