Mentors guide hackathon teams during the build phase — answering technical questions, helping debug tricky bugs, advising on architecture and scope, reviewing code, and unblocking teams when they get stuck. A typical mentor circulates among 3-5 teams over the weekend, spending 30-60 minutes with each team across multiple touchpoints. Mentors do not score or judge projects; that role belongs to judges, who are intentionally separate.

Plan on 8-16 hours over the hackathon weekend. A typical Saturday is 4-6 hours of in-event mentoring, Sunday is another 4-6 hours, plus a 30-minute Friday kickoff briefing. We use a shift signup so mentors can come and go — you do not need to be present continuously. For online events, mentor availability is asynchronous through Discord and the time investment is similar but more flexible.

Yes — Opportunity Hack issues Heart Certificates to mentors who demonstrate genuine engagement during the event. The bar is proactive helpfulness: reaching out to teams directly on Slack (for virtual events) or in person, reviewing code, offering architecture or debugging advice, and following up when a team gets stuck. Simply posting in a general channel that you're available does not qualify. The same standard applies whether you're mentoring remotely or on-site — judges don't just check that you showed up; they look for evidence that teams actually benefited from your involvement. After the hackathon, mentors who met that bar can request their Heart Certificate through the organizer team.

No single stack is required. We recruit mentors across full-stack web (React, Next.js, Node, Python, Ruby), mobile (iOS, Android, React Native), data engineering and ML, security, design, product management, and DevOps. When you sign up, you list your areas of expertise and we route team questions to mentors with matching skills. Mentors are expected to know their own stack well; nobody is expected to know every stack.

No — mentoring is a volunteer role. Many mentors use it for their employer's ESG / corporate-volunteer-time programs and we provide an attendance letter on request. Sponsor companies can also secure dedicated mentor slots for their teams as part of a sponsorship package — that is a popular professional-development perk and counts toward most ESG goals.

Yes. We run online-only events during the summer where all mentoring is remote (Discord and Slack), and most in-person events also have a remote mentor track for our distributed volunteers. Roughly 30% of our mentor pool participates remotely. In-person mentoring tends to be higher-impact for first-time teams (the in-room presence helps), but remote mentoring works well for code-review, architecture discussions, and senior engineers who can't travel.

First-time mentors are welcome. We pair new mentors with veterans for their first event so you can shadow before you mentor solo. Before each event we run a 30-minute orientation covering mentor expectations, the team-matching system, escalation paths for hard questions, and the boundary between mentoring (helping the team build) and doing (writing code for the team). After the orientation most first-timers feel ready to jump in.

Yes — through our Founding Engineer program. Mentors who want to continue with a project after the event can apply to become Founding Engineers. The Founding Engineer program is unpaid volunteer work that continues for weeks or months post-hackathon, helping the project ship to production, fix bugs, and train the nonprofit's staff. Many of our most experienced mentors started by signing up for one weekend and then continuing with a project they connected with.

Mentors guide teams during the build phase and do not score projects. Judges arrive Sunday afternoon to evaluate completed projects and do not engage with teams during the build. The roles are intentionally separated to avoid conflict-of-interest. Many volunteers do both at different events; doing both at the same event isn't allowed. If you want to evaluate projects rather than guide their construction, see our Hackathon Judge Opportunities page.