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Software Engineer : Core Team (Remote) at Constructor. About Us. Constructor is the next-generation platform for search and discovery in ecommerce, 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 ecommerce 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.. The Team. The Core Team sits at the heart of Constructor, shaping Constructor’s in-house search engine, where user requests meet customer catalogs and Constructor’s learnings. We build and operate the foundational systems that power every request flowing through the platform, enabling fast, reliable, and intelligent interactions at massive scale.. Our systems handle billions of requests daily with exceptional uptime, and we take pride in delivering a highly scalable, resilient, and globally distributed platform. As part of the Core team, you will help design, build, and maintain the critical infrastructure and services that underpin the entire product, ensuring performance, stability, and reliability across the globe.. You’ll thrive in this role if you:. Have a strong foundation in computer science, including algorithms, data structures, concurrency, and systems design.. Have experience building and scaling high-traffic, high-availability backend systems.. Have experience designing and operating backend infrastructure, including deployment automation, capacity planning, and observability.. Are comfortable working across different layers of the stack, from performance-critical code to production operations.. Enjoy learning new technologies and tools in a fast-moving, large-scale environment.. Collaborate effectively and contribute to a positive, ownership-driven team culture.. Our Tech Stack. Languages: Rust, C++, Python. Cloud Infrastructure: AWS. CI/CD: Jenkins, GitHub Actions. Monitoring & Observability: Prometheus, Grafana. Company Location: Spain.