Senior Software Engineer
I build frontend interfaces for complex product workflows
I'm a senior software engineer focused on building product-facing systems with React, TypeScript and Node.js, especially for billing, subscriptions, access and support tools.
Recently, I have been exploring AI-assisted interfaces for retrieval evaluation, review queues and developer-facing quality workflows.
Work
Recent projects around retrieval quality, review queues, frontend QA and revenue-risk workflows.
A retrieval evaluation tool for testing whether a help-center assistant finds the right source documents before generating an answer.
It compares keyword, embedding and hybrid retrieval strategies against a fake SaaS help-center dataset, with metrics for hit rate, recall and ranking quality.
A frontend QA prototype that turns screenshots, DOM snippets and accessibility findings into structured review items.
The project focuses on separating visual evidence from code evidence, so AI-generated findings stay inspectable instead of becoming vague bug reports.
A review queue for support messages that may affect billing, access or revenue.
It parses messy customer messages into structured risk signals so a human reviewer can quickly inspect the issue, correct the output and decide what needs attention.
I'm a senior software engineer based in Berlin, with 10+ years of experience across SaaS, ad tech and gaming.
I spent the last decade working across frontend systems, backend integrations, support tools, billing flows and product-heavy SaaS workflows. Recently, I have been building practical projects around retrieval evaluation, review queues, frontend QA and developer-facing quality tools.
Most of my work has been frontend-led but I'm comfortable doing backend and API work when the product needs it.
I work well when there is ambiguity to reduce: unclear requirements, complex states, cross-team dependencies or a rough product idea that needs to become a usable system.
Need senior engineering help on a complex product workflow?
Get in touch if you need senior engineering help with billing, subscriptions, support tools, dashboards or AI-assisted interfaces.
Prefer email? nada@nadasadek.com