Data Scientist (Offer Ranking & Recommendations)

Ever looked at a marketplace and thought, “The ranking logic here decides everything”? At Eldorado.gg, that’s not an exaggeration. Our marketplace serves millions of gamers every month and hosts hundreds of thousands of live offers across different games and product categories - all competing for visibility in real time.

We’re looking for a Data Scientist to take ownership of our Eldorado.gg’s offer ranking and recommendation algorithms. This role sits at the very core of the product: what users see, what they click, and what they buy. You’ll work closely with backend developers and product owners to design, ship, and iterate on ranking logic that runs continuously at scale.

👉 BREAKDOWN:

Analyze current heuristic ranking to identify weaknesses and conversion drivers;

Run A/B tests on weight adjustments, new signals, randomization strategies;

Build data instrumentation: log impressions, clicks, conversions with position/context;

Generate training datasets from logged user interactions;

Establish offline evaluation framework (NDCG, MAP) and online testing protocols;

Build initial supervised models and compare against heuristic baselines;

Deploy learning-to-rank models with gradual rollout and monitoring;

Architect scalable ranking stack: candidate generation → scoring → re-ranking;

Define long-term ML roadmap and establish data science best practices.

👉 SKILLS YOU’LL NEED

2+ years in data science or ML engineering;

Data analysis & experimentation: SQL, pandas for exploratory analysis, A/B testing methodology, statistical significance, metric interpretation;

Feature engineering: design and compute signals from raw data (seller behavior, offer characteristics, user context);

Python ML fundamentals;

Pragmatic iteration: comfortable improving heuristics before jumping to ML, knowing when simple beats complex;

System thinking: design data pipelines and evaluation frameworks that scale, not just one-off analyses;

Ownership mindset: define multi-phase roadmap from current state to production ML;

Fluency in both English and Lithuanian (written and spoken);

Communication: explain ranking tradeoffs and experiment results to product and engineering teams.

👉 BONUS POINTS

Ranking/recommendation system experience;

Production LTR experience: deployed learning-to-rank models in search, recommendations, or ads;

Feature stores: Feast, Tecton, or custom feature serving infrastructure;

MLOps tooling: MLflow, model monitoring, deployment automation;

Neural ranking models: transformers, deep cross networks for future evolution;

Marketplace or ecommerce experience;

Passion for video games and gaming culture.

👉OUR DATA STACK
 

Stitch for data synchronization;

Google BigQuery for storage and warehousing;

dbt for data modeling;

Growthbook for AB testing;

Amplitude for product analytics;

Grafana for visualization.

👉 WHY ELDORADO.GG

Because you’ll join a team that values bold ideas. Your work won’t just sit in a folder - it will live on screens worldwide, reaching a community of gamers and creators who love what we do.

Founded in 2018, Eldorado.gg is a leading marketplace for in-game items, accounts, and services. We enable secure trading across 150+ top games like RuneScape, WoW, League of Legends and others, attracting 7M+ monthly visits from gamers worldwide.

👉 WHAT WE OFFER

Hybrid work model: work 4 days at our Vilnius office (Simbiocity), and 1 remote;

Office perks: free parking by the office, a fully stocked kitchen, Friday bun breakfasts, and a gaming room (table football, driving simulator, PS5, Xbox One). Pets are always welcome, and we love a good get-together - from game nights to sports events;

Development: internal library, latest tools and technology, professional conferences, and mentorship to level up your skills, opportunities for internal career growth;.

Health and fitness: Private health insurance (after trial), join your colleagues for fun, no-cost volleyball games at Delfi Arena, sick days (no doctor’s note needed);

Extras you’ll love: Monthly top-ups for your Eldorado.gg account (after trial), gifts for graduations, weddings and new parents, partner discounts, and referral bonuses.

👉 GROSS SALARY

4000 - 8000 EUR gross per month, depending on your experience.

📌 Think you’re the right fit? Let’s create something epic together!