Turn a job description into the topics worth your time.
Study curated technical Q&A, understand the tradeoffs,
and keep track of what needs another look.
Technical theory preparation for software engineers · Web & Android
Your topics, chosen from the job description.
Asynchronous I/O avoids tying up a thread while a request waits. It does not make unlimited concurrency safe.
Bound the number of in-flight calls, propagate cancellation, and choose timeouts that fit the operation.
NORTHSTAR · BACKEND ENGINEER
A timeout sets a limit on how long to wait. Cancellation tells work that its result is no longer needed.
Pass a cancellation token through async calls. Stop unnecessary work when the request ends, and release resources even when an operation fails.
Choose timeout budgets that protect capacity without cutting off normal requests.
From language fundamentals to production decisions
START WITH WHAT MATTERS
A role mentions a language, a framework, a database, and a dozen other things. Another interview prep checklist only makes the list longer.
RoleHello brings the relevant topics into one study workspace, with questions that help you explain the concepts behind the work.
Start with the roleHOW IT WORKS
Bring the role. Review its topics. Pick up where you left off.
Upload a PDF or DOCX, or paste the text. The requirements of your next role give you a starting point.
PDF, DOCX, or pasted textReview the technical scope and suggested catalog topics. Keep the technologies that matter and confirm your study plan.
You make the final selectionStudy curated questions and explanations. Mark what you have covered, revisit weak spots, and collect unfamiliar terms.
Study, understand, revisitWHAT'S INSIDE
A place for the knowledge you want to have ready when someone asks.
Study how a concept works, when it is useful, and where it can go wrong. Move from the basics into deeper technical discussions.
“It depends.”
Mark questions Completed or Revisit. Come back to a focused list instead of starting from scratch.
Collect terms in your queue as you study. Premium adds contextual explanations and a saved history you can return to.
TECHNICAL INTERVIEWS ARE CONVERSATIONS
Mechanics matter. So do performance, reliability, and the tradeoffs
behind a decision. Prepare to talk about both.
PLANNED LAUNCH PRICING
Start small, buy a role, or get 5 roles with Premium. Public purchasing is not open yet.
Free for new users
Try preparation for one introductory role.
$1.99 USD / role
For a focused preparation workspace.
$10 USD / month
Prepare across roles and dig into unfamiliar terms.
Planned USD pricing. Final checkout prices, local currency, taxes, and purchase terms will be shown before payment at launch.
RoleHello is a technical interview preparation app built around a job description. It helps you identify the relevant technologies and study curated questions and answers for those topics.
No. RoleHello focuses on technical knowledge and explaining how things work: languages, frameworks, architecture, databases, and production tradeoffs. It does not run coding exercises or live mock interviews.
No. AI helps analyze the job description. Your confirmed topics connect to a shared, curated catalog of questions and answers rather than a newly generated personal question bank.
Yes. You review the technical scope and can edit the suggested topic selection before you confirm it. A company name or role title alone does not define your study plan.
The app supports PDF and DOCX files up to 10 MiB. PDFs can contain up to 10 pages. You can also paste a job description as text.
Yes. The planned free introduction gives new users one role with up to 3 topics and 5 questions per topic: up to 15 questions to try the study experience.
Premium is planned at $10 per month with 5 roles included, contextual term explanations, and saved Lookup history. Daily lookup limits apply. You can also purchase individual roles without a Premium plan.
The public launch is still being prepared. Web and Android are the first planned platforms. Contact us below if you would like to ask about early access. No account or payment is required to browse this website.
YOUR NEXT ROLE STARTS WITH A HELLO
We're getting RoleHello ready for its public launch.
Have a question or want to ask about early access?