-
Constructor

Backend Engineer - Ranking Team

Constructor
Spain · Full-time · Entry

About The Team

The Ranking team, within the Machine Learning chapter, plays a central role in implementing algorithms that optimize for business KPIs like revenue & conversions. We focus on metrics over features, arming our ranking algorithms with powerful capabilities that bring value to customers in the way they care the most about.

As a member of the Ranking team, you will be surrounded by and encouraged to use world-class analytical, engineering and machine-learning techniques on big data to shape the evolution and scale of our ranking algorithms. The team owns all stages of products ranking for Search, Browse, and Autocomplete experiences, including base ranking, second-stage ranking, and ranking explanation.

One of the main services the Ranking team owns is the ML Ranking Service which is a high-load distributed REST service deployed in the cloud and developed in Python programming language. The service extensively uses in-memory and NoSQL DBs (for signals and model metadata storage). We support service deployment and stability. We have monitoring set up with Prometheus, PagerDuty, Sentry, and custom internal APIs with FastAPI).

Challenges you will tackle

A primary focus of this job is to design, deliver & maintain highload real-time web services in close collaboration with other great engineers from the Ranking team. The job can consist of, but is not limited to:

  • Build, deploy, and support robust high-load machine learning-based real-time systems for search and browse experiences.
  • Collaborate with technical and non-technical business partners to develop and update ranking functionalities
  • Optimize current ranking service performance to process requests faster
  • Optimize signals delivery and retrieval (aka Feature Store) for machine learning model inference
  • Communicate with stakeholders within and outside the team


Requirements

Hard skills:

  • Experience in designing, developing & maintaining high-load distributed real-time services (in cloud)
  • Proficiency in Infrastructure as Code (IaC) tools like CloudFormation or Terraform for managing cloud resources
  • Experience with MLOps is a huge plus (delivering, loading, and serving ML models and related infrastructure)
  • Hands-on experience with setting up and improving CI/CD pipelines
  • Proficiency with Python and, as a plus, compiled languages like C, Rust, or Go.
  • Experience in server-side coding for web services, and a good understanding of API design principles
  • Skilled in setting up and managing observability tools like Prometheus, Grafana, and integrating alert systems like PagerDuty
  • Familiarity with Service-Oriented Architecture, knowledge of communication protocols like Protobuf & familiarity with networking principles
  • Experience with NoSQL and relational databases, distributed systems, and caching solutions
  • Experience with any of the major public cloud formation: AWS (ideally), Azure, GCP


Soft skills:

  • Experience collaborating in cross-functional teams
  • Excellent English communication skills
  • Enjoy helping others around you grow as developers and be successful
  • Pick up new ideas and technologies quickly, love learning and talking to others about them
  • Love to experiment and use data and customer feedback to drive decision-making


Benefits

  • Compensation: base range of 90-110k USD + stock options + work from home bonus
  • Fully remote team - choose where you live
  • Work from home stipend! We want you to have the resources you need to set up your home office
  • Apple laptops provided for new employees
  • Training and development budget for every employee, refreshed each year
  • Parental leave for qualified employees
  • Work with smart people who will help you grow and make a meaningful impact


Diversity, Equity, and Inclusion at Constructor

At Constructor.io we are committed to cultivating a work environment that is diverse, equitable, and inclusive. As an equal opportunity employer, we welcome individuals of all backgrounds and provide equal opportunities to all applicants regardless of their education, diversity of opinion, race, color, religion, gender, gender expression, sexual orientation, national origin, genetics, disability, age, veteran status or affiliation in any other protected group. Studies have shown that women and people of color may be less likely to apply for jobs unless they meet every one of the qualifications listed. Our primary interest is in finding the best candidate for the job. We encourage you to apply even if you don't meet all of our listed qualifications.

Key Skills

Ranked by relevance

machine learning cloud prometheus python nosql infrastructure as code cloudformation terraform pagerduty big data grafana storage server mlops rust cicd aws c
Login to Apply
Posted
Jan 16, 2025
Type
Full-time
Level
Entry
Location
Spain

Industries

IT Services IT Consulting

Categories

Engineering

Related Jobs

3 roles aligned with this opportunity

View all jobs
View Job Details
ETE Technology AS
Related

Machine Learning Engineer

2026-06-19

Full-time
Entry
Turkey
IT Services
Engineering
View Job Details
devicenow
Related

Senior Platform & Backend Engineer

2026-06-18

Full-time
Not Applicable
Poland
IT Services
Engineering
View Job Details
GamblingCareers.com
Related

Automation and AI Engineer

2026-06-19

Full-time
Not Applicable
Spain
Gambling Facilities
Engineering