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Stanislav Kanzafarov's avatar
Stanislav Kanzafarov
Lisbon, Portugal
Expert in scalable algo trading and backtesting solution
Expert in scalable algo trading and backtesting solution
Cover image for Design and Development of a High-Load Trading System for CEX
Design and Development of a High-Load Trading System for CEX
0
5
Cover image for Development and Backtesting of Algorithmic Trading Strategies
Development and Backtesting of Algorithmic Trading Strategies
0
8
Cover image for High-Performance Algorithmic Arbitrage Bot on the Solana
High-Performance Algorithmic Arbitrage Bot on the Solana
0
16
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Quantum Engineer(2)
Christian Neureuter's avatar
Christian Neureuter
Lockport, USA
InSite Tech Solutions: Websites, Software & More
InSite Tech Solutions: Websites, Software & More
Cover image for QAOA Implementation for MAX-SAT Problems
QAOA Implementation for MAX-SAT Problems
0
7
Cover image for Launch of InSite Tech Solutions
Launch of InSite Tech Solutions
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3
Cover image for PyCAT-Napari Bio-image Analysis Platform
PyCAT-Napari Bio-image Analysis Platform
0
8
Cover image for Biophysics Lab Website and Branding
Biophysics Lab Website and Branding
0
4
Quantum Engineer(1)
Redion Bufi's avatar
Redion Bufi
Fier, Albania
QA Engineer
24
Followers
QA Engineer
Cover image for QA Audit — Rapid Product
QA Audit — Rapid Product Quality Reviews (Upwork) Delivered short-term QA audits for multiple startups, reviewing products from a first-time user and quality perspective. Focused on fast feedback, clarity, and launch readiness. Highlights Created smoke checklists and readiness / release validation documents Identified blockers, broken flows, and UX issues quickly Delivered clear reports with reproduction steps, screenshots, and actionable recommendations
3
146
Cover image for Tabs — Senior QA Engineer
Tabs — Senior QA Engineer (Payments & SaaS) Worked as a long-term QA Engineer on a B2B SaaS platform focused on billing, invoicing, and financial workflows. Collaborated closely with developers and product to ensure stable releases across complex payment logic and integrations. Highlights Validated critical billing flows (subscriptions, invoices, credits, taxes) Tested integrations with third-party financial systems and APIs Reduced production issues by catching edge cases early in the release cycle
3
184
Cover image for WeScope — QA Engineer for
WeScope — QA Engineer for No-Code Platform (Manual + Automation) QA Engineer on a large no-code/low-code platform used to build internal tools and production apps. Owned both exploratory testing and test automation to support fast and frequent releases. Highlights Built and maintained automation checks using Playwright Tested core builder functionality, user flows, and UI logic Supported frequent releases with a mix of manual testing and automated smoke coverage
2
2
175
Cover image for Structure fi (http://Structure.fi) — QA
Structure fi (http://Structure.fi) — QA Lead (Web & Mobile) Acted as QA Lead for a fintech/web3 product, owning quality across web and mobile while coordinating testing efforts before releases. Highlights Led and coordinated a team of 2 mobile QA testers Defined testing scope, priorities, and release readiness Performed exploratory and regression testing to ensure stable launches
2
153
Quantum Engineer(1)
Anvay Sanil's avatar
Anvay Sanil
Mumbai, India
I ship end-to-end production AI. Zero notebook prototypes.
New to Contra
I ship end-to-end production AI. Zero notebook prototypes.
Cover image for Project Sigma — Quantum Circuit Geometry
Project Sigma — Quantum Circuit Geometry
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0
Cover image for AdS-CFT SciML Engine — Neural Operator
AdS-CFT SciML Engine — Neural Operator
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1
Cover image for BioScribe AI — LLM Drug Discovery
BioScribe AI — LLM Drug Discovery
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0
Cover image for LAZARUS — Multimodal Medical AI
LAZARUS — Multimodal Medical AI
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1
Quantum Engineer(2)