› Ewance — Real-world challenge

Implement an LSM-Tree-Based Storage Engine Prototype

Implement a teaching-grade LSM-tree storage engine in Rust with pluggable compaction strategies and benchmark them on YCSB-shaped workloads.

Research Lab · Expert · ~50h

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› Ewance — Praxisnahe Challenge

Reservoir-Sampling für Echtzeit-Telemetrie eines IoT-Plattformanbieters

Wie zieht man bei konstantem Speicher eine unverzerrte Stichprobe der Größe k aus einem Sensor-Stream unbekannter Länge, und wie weist man die Unverzerrtheit empirisch nach?

Industrie-IoT (Maschinenbau) · Advanced · ~22h

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Ewance verwandelt praxisnahe Challenges in verifizierbare Nachweise, denen Recruiter vertrauen. · t.me/ewance

› Ewance — Reto del mundo real

Predicción de abandono para plataforma de pagos B2B en Ciudad de México

Cómo anticipar el abandono de clientes B2B en una fintech de alta velocidad de crecimiento para enfocar recursos de retención con eficiencia y reducir la tasa de churn que erosiona el crecimiento neto.

Fintech B2B · Intermediate · ~16h

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› Ewance — Real-world challenge

Build PR-Based Environment Promotion for a SaaS

Replace manual prd promotion with PR-based image-bump automation via Flux + GitHub Actions, with deployment freeze windows and clear approval flow.

B2B Vertical SaaS · Intermediate · ~22h

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› Ewance — Praxisnahe Challenge

Kundensegmentierung fuer einen Schwarzwald-Tourismusverband

Identifiziere 4-6 belastbare Gaestesegmente und liefere pro Segment eine handlungsfaehige Kampagnenempfehlung.

Tourismus · Intermediate · ~16h

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› Ewance — Reto del mundo real

Mapa de comunidades en red de cooperativas vitivinícolas

Mapear la red multicapa de 64 cooperativas y proponer 5 intervenciones que reduzcan el retraso de difusión de innovaciones hacia el 30 % periférico.

Agroalimentaria / Cooperativas · Advanced · ~26h

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› Ewance — Role spotlight

Data Scientist

Somewhere between a researcher and a software engineer sits the data scientist, the person who answers questions a company didn't quite know how to ask. The work blends statistics, programming, and a stubborn refusal to accept easy explanations. One week you might design an experiment to measure whether a new feature actually causes more usage, the next you might build a forecasting model that shapes next year's h…

44 real-world challenges · Data Science

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› Ewance — Real-world challenge

Frame an AI Opportunity for a Mid-Cap Insurance Carrier

Convert 18 candidate AI initiatives into a credible 3-tier portfolio the executive committee will fund.

Insurance · Intermediate · ~18h

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› Ewance — Praxisnahe Challenge

Multi-Modal-RAG fuer Salzburger Tourismus-Concierge

Baue ein Multi-Modal-RAG, das Text und Bilder kombiniert und Gaestefragen mit zeitlicher Kontextierung beantwortet.

Tourismus · Advanced · ~26h

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Ewance verwandelt praxisnahe Challenges in verifizierbare Nachweise, denen Recruiter vertrauen. · t.me/ewance

› Ewance — Reto del mundo real

Diagnóstico de ciclo económico para una bodega familiar exportadora a Latinoamérica

¿Cómo puede una bodega familiar riojana distinguir entre riesgos cíclicos transitorios y cambios estructurales permanentes en sus mercados latinoamericanos para decidir su asignación de capital comercial?

Vino y bebidas premium · Intermediate · ~12h

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› Ewance — Real-world challenge

Pricing Strategy for a Singapore D2C Cosmetics Brand

Determine the optimal launch price for a new serum under demand uncertainty, considering cost structures and competitive response.

D2C Cosmetics · Intermediate · ~8h

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› Ewance — Praxisnahe Challenge

Paid-Social-Kampagne für ein nachhaltiges Textil-Startup in München

Wie kann ein pre-seed-finanzierter nachhaltiger Modeanbieter mit begrenztem Budget durch gezielte Paid-Social-Werbung profitable erste Kunden gewinnen und gleichzeitig Markenbekanntheit aufbauen?

Nachhaltige Mode · Beginner · ~12h

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› Ewance — Real-world challenge

Design a Post-Editing Workflow for a Cross-Border Fintech

Design a tiered machine-translation-post-editing workflow that delivers 35-50% localization-cost reduction with a measurable quality gate.

Fintech AI · Advanced · ~24h

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› Ewance — Praxisnahe Challenge

EHR-basierte Phaenotypisierung fuer ein Basler Pharma-Forschungsteam

Identifiziere aus einem grossen EHR-Datensatz seltene Phaenotyp-Patient:innen mit hoher Praezision und uebergibst eine produktive Pipeline.

Pharma / Chemie · Advanced · ~24h

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Ewance verwandelt praxisnahe Challenges in verifizierbare Nachweise, denen Recruiter vertrauen. · t.me/ewance

› Ewance — Reto del mundo real

Minería de patrones de compra en cadena de supermercados

Entregar las 50 reglas de asociación más útiles por categoría, identificar tiendas con patrones atípicos y dejar un protocolo de actualización mensual operable por el equipo comercial.

Retail de Alimentos · Intermediate · ~22h

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› Ewance — Real-world challenge

Launching a D2C Subscription for a Cosmetics Brand

How can Glow & Co. design and launch a subscription box service that drives recurring revenue while reinforcing its sustainable brand identity?

D2C Cosmetics · Intermediate · ~12h

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› Ewance — Role spotlight

Accountant

What does a company actually owe, earn, and own? An accountant answers that question with evidence rather than estimates. The work is part historian, part detective: closing the books each month, reconciling accounts that refuse to agree, and turning thousands of transactions into a story leadership can act on. Strong accountants build a feel for GAAP not as rules to memorize but as a shared language for trust. As…

9 real-world challenges · Finance & Accounting

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› Ewance — Praxisnahe Challenge

Kausalanalyse der Fördermittelwirkung auf Solarpanel-Absatz

Wie groß ist der kausale Effekt regionaler Förderprogramme auf den Solarpanel-Absatz, und wie lässt er sich von Preiseffekten und regionaler Heterogenität isolieren?

Erneuerbare Energien · Advanced · ~24h

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Ewance verwandelt praxisnahe Challenges in verifizierbare Nachweise, denen Recruiter vertrauen. · t.me/ewance

› Ewance — Reto del mundo real

Migración de catálogo de productos de SQL a NoSQL para marketplace B2B

¿Cómo rediseñar un catálogo de productos B2B con atributos altamente variables en una base NoSQL documental que escale sin degradar el rendimiento de búsqueda?

Fintech B2B · Advanced · ~28h

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› Ewance — Real-world challenge

Negotiating a Strategic Alliance for a Seoul D2C Cosmetics Brand

How can GlowUp negotiate a retail partnership that expands distribution without sacrificing brand control or profitability?

D2C Cosmetics · Intermediate · ~8h

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