Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

Volunteer senior developer to design, build, and maintain a cross-platform medical scheduling app (web, iOS, Android). Participate across the full development lifecycle: design, coding, testing, CI, deployments, code reviews, production support, incident management, and platform architecture. Attend weekly standups and commit at least four hours per week.

Develop, maintain, and optimize mission-critical backend APIs and scalable cloud services for web and mobile clients. Implement secure, high-performance systems, automated tests, observability, and technical documentation. Mentor peers, follow best practices, and support a proof-of-concept launch and fundraising activities as a volunteer contributor.

Volunteer generalist supporting nonprofit formation, day-to-day operations, tracking pro bono matters, social media and marketing content, IT and finance support, research, and special projects. Requires proactive, independent work and weekly standups.

Volunteer marketing strategist to research market fit and competitors, plan and execute integrated paid and social campaigns, optimize online presence and lead-nurturing, analyze campaign performance, and support content, product launches, and fundraising. Requires collaboration with team, weekly meetings, and minimum 4+ hours/week commitment.

Design and produce social-media content and graphics (Instagram, Facebook, email banners), support short-form video/animation (Reels, TikTok optional), attend weekly standups, commit ≥4 hours/week, and help launch a fundraising campaign for an early-stage nonprofit/tech startup.

Lead development and fundraising efforts for an early-stage nonprofit: research grants, draft proposals, build donor relationships, plan events, track results, and report to leadership. Volunteer, remote, minimum 4 hours/week and weekly standup attendance required.

Design, build, test, and support EPIC integration solutions across the full interface lifecycle. Gather requirements, resolve integration issues, develop standards and documentation, and provide production support within a remote, volunteer, part-time setup.

Write and edit original marketing and communications copy across digital channels; research audiences; collaborate with account and creative teams; present and revise deliverables; steward brand voice; optimize messaging for SEO, engagement, and conversion; and participate in weekly meetings. This is a volunteer, remote, part-time role (minimum 4 hours/week) supporting a pre-seed nonprofit/tech startup.

Volunteer role to develop financial projections and fundraising strategy for an early-stage nonprofit/tech startup. Responsibilities include financial modeling for pitch materials, identifying funding sources (donors, grants, crowdfunding), and advising on investment of firm funds. Requires weekly meetings and a minimum 4+ hours/week commitment.