Senior Fullstack Engineer (Offsite Discovery) (Python, Django)

Constructor is the next-generation platform for search and discovery in e-commerce, built to explicitly optimize for metrics like revenue, conversion rate, and profit. Our search engine is entirely invented in-house utilizing transformers and generative LLMs, and we use its core and personalization capabilities to power everything from search itself to recommendations to shopping agents. Engineering is by far our largest department, and we’ve built our proprietary engine to be the best on the market, having never lost an A/B test to a competitive technology. We’re passionate about maintaining this and work on the bleeding edge of AI to do so.

Out of necessity, our engine is built for extreme scale and powers over 1 billion queries every day across 150 languages and roughly 100 countries. It is used by some of the biggest e-commerce companies in the world like Sephora, Under Armour, and Petco.

We’re a passionate team who love solving problems and want to make our customers’ and coworkers’ lives better. We value empathy, openness, curiosity, continuous improvement, and are excited by metrics that matter. We believe that empowering everyone in a company to do what they do best can lead to great things.

Constructor is a U.S. based company that has been in the market since 2019. It was founded by Eli Finkelshteyn and Dan McCormick who still lead the company today.

About the Team

The Recommendation Cross-Channel & Offsite Discovery team is building a platform that empowers marketers to unlock the full potential of multichannel ecommerce discovery. Our service leverages real-time shopper behaviour from website activity to power personalized offsite experiences across multiple channels — including Emails, Push notifications, ads, and more.

In a nutshell, we provide real-time personalized experience in static emails and specialize in delivering high-volume traffic (up to 10,000 requests per second). Our goal is to show shoppers what they want, when they want it — boosting engagement, driving revenue, and delivering robust campaign analytics insights at scale.

We're a passionate team of cross-functional engineers who love challenges and want to make shoppers' lives better. We value empathy, openness, curiosity, continuous improvement, and great code. We believe that empowering everyone in a company to do what they think is best can lead to great things.

The Recommendation Cross-Channel & Offsite Discovery team is new and looking for a Senior Fullstack Engineer who will help us build our Customer Dashboard interface for customers to easily manage their marketing campaigns.

Responsibilities

The primary focus of this job is to help implement, deliver & maintain our web application features in close collaboration with other engineers.

• Implement New Features: develop customer dashboard features using TypeScript and React. These features will interact with our backend services, which are built with Python and FastAPI.
• Innovate and Strategize: participate in brainstorming sessions to develop new features and tools that will shape the future of Offsite Discovery.
• Collaborate on Functionality: work with both technical and non-technical business partners to develop and update application functionalities.
• Communicate with Stakeholders: keep stakeholders, both inside and outside the team, informed about project progress and developments.

Requirements

• Strong foundation with client-side JavaScript, computer science background & familiarity with networking principles.
• Solid experience with TypeScript and frontend frameworks like React.
• Experience building, maintaining, and debugging full-stack web applications.
• Experience with Python and one of the backend frameworks like FastAPI, Flask or Django, or willingness to learn and work with this stack.
• Good understanding of API design principles.
• Familiarity with Service-Oriented Architecture (SOA).
• Experience with relational databases, distributed systems, and caching solutions (MySQL/PostgreSQL).
• Analytical skills and experience with SQL to gather insights into dashboard reports and solutions (ClickHouse, Athena).
• Experience with any of the major public cloud service providers: AWS, Azure, GCP.
• Experience collaborating in cross-functional teams.
• Excellent English communication skills.
• Must be located within or near the WET timezone (e.g., Germany, Portugal) and available to work core business hours approximately 9:00 AM — 6:00 PM WET. This is critical to ensure continuous coverage and rapid response to customer and CSM queries across timezones.

Nice to have

• Familiarity with serverless design patterns, particularly with AWS Lambda.
• Experience working in remote environments.

Benefits

• Unlimited vacation time — we strongly encourage all of our employees to take at least 3 weeks per year.
• 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.
• Maternity & Paternity leave for qualified employees.
• Work with smart people who will help you grow and make a meaningful impact.
• This position has a base salary range between $80k and $120k USD. The offer varies on many factors, including job-related knowledge, skills, experience, and interview results.
• Regular team offsites to connect and collaborate.

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.