About
the Role 99Pledges a fundraising technology platform that powers online donation campaigns for organizations, teams, and individuals through our flagship product and through white-label deployments for partners. We process real money at scale, so correctness, reliability, and security are core to everything we build. We're looking for a Senior Software Engineer who thrives in a mature, production Rails codebase, cares deeply about payment integrity, and can own features end-to-end from database schema to background jobs to the user-facing UI.
About
the Role
What You'll Work On Core fundraising platform : Campaigns, participants, donations, and the reporting and metrics that fundraisers rely on. Payment processing : Integrations with multiple payment providers (credit card, PayPal, and ACH/EFT), including automatic payouts, payment requests, and reconciliation. Multi-tenant white-label system : Branding, feature flags, and configuration that let partners run the platform under their own identity. Fraud prevention & trust : Fraud detection, device fingerprinting, and abuse mitigation that keep donors and organizations safe. Background processing : Reliable email delivery, data exports, and scheduled metric calculations. Tech Stack Backend : Ruby on Rails 7, Ruby 3.1 Database : PostgreSQL (production), with careful attention to migrations and denormalized/calculated fields for performance Frontend : HAML, SCSS, Bootstrap, jQuery Background jobs : Delayed Job (Active Record backend) Payments : Braintree, PayPal, Dwolla Infrastructure : Heroku, AWS S3, Redis Email : Postmark Monitoring : Honeybadger (errors), New Relic (performance), Datadog (migrating to) Analytics/experimentation : PostHog
What We're Looking For Required 3+ years building and maintaining production web applications, with strong Ruby on Rails experience. Solid grasp of relational database design, query performance, and safe migrations against large production tables. Experience integrating third-party APIs, ideally payment processors, and an appreciation for the failure modes that come with them (retries, idempotency, webhooks, reconciliation). A test-first mindset, you write well-tested code and treat correctness and edge cases as first-class concerns. Comfort working across the stack, including server-rendered views and front-end interactivity. Strong communication skills and the ability to explain technical tradeoffs clearly.
Nice to Have Experience with payment/fintech systems, PCI considerations, or handling money in software. Familiarity with multi-tenant / white-label architectures. Experience with background job systems and asynchronous processing at scale. Exposure to fraud detection or trust & safety systems. Experience with feature flagging and A/B experimentation (e.g., PostHog).
How We Work We review designs before writing code and favor explicit, well-engineered solutions over clever ones. We prefer DRY code, thorough testing, and small, reviewable changes. We take production seriously: careful migrations, monitoring, and a bias toward correctness — because we handle donations that matter to real people and organizations.
Why Join Us You'll work on software that helps organizations raise money for causes they care about, with a small team where your work has direct, visible impact on both the product and the people who depend on it. Our Values at Beacon Software Humility : We acknowledge that the path to getting to the right answer involves being wrong along the way. We have strong beliefs which are weakly held. We actively seek new ideas and believe we can learn from anyone at any time. Honesty : We are truth seeking in our approach to business problems. Business is a repeat game and we believe that human relationships generate alpha. We understand that trust is earned over a lifetime and can be lost in an instant. Hunger : We play to win. We hold ourselves to high standards and will not be outworked. We take pride in having a deep sense of responsibility to ourselves, each other, our partners, and our customers. We believe to whom much is given much is expected. Horizon : We seek to build a generational software company. This will take decades. We manage our expectations and those of our partners to take advantage of the 8th wonder of the world - compounding growth. How We Use AI in Our Hiring Process: To ensure transparency, we want candidates to know that Beacon Software uses Artificial Intelligence and AI-enabled tools to assist with screening, reviewing, organizing and highlighting profiles and applications that match the key
requirements for each role. AI does not make hiring decisions: Every application is reviewed by a member of our team, and all decisions throughout the process are made by humans. We use AI to support efficiency and consistency, not to replace human judgment. We are committed to a fair, thoughtful, and equitable experience for every candidate.
Beacon Software is a new type of software holding company with the mission to buy, build, grow and hold great vertical market software businesses.
We are not a financial firm. We are technology entrepreneurs who are passionate about building great software. We seek out founders who have built their business by spending years understanding their market and prioritizing their customers-specific needs. Our flexible structure offers entrepreneurs a unique option to implement a transition that ensures the continuity of the company while receiving liquidity at full value for their equity in their business. Beacon acquires companies with the intent to hold them forever and to invest in their continued growth. We have a permanent, committed capital base with a long-term time horizon and no pressure/intent to sell to another buyer.
On November 4, 2025, we announced our $250M Series B (press release). Our capital comes from a diverse set of investors including Wall Street (D1 Capital, CPMG), Silicon Valley (General Catalyst), the family offices of great technology entrepreneurs (John & Patrick Collison, Tony Xu, Eric Glyman, Karim Atiyeh) and evergreen funds which specialize in buy/hold models (Sator Grove).
Beacon Software was founded by entrepreneurs Nilam Ganenthiran (former President of Instacart and partner at D1 Capital) and Divya Gupta (former partner at Sequoia Capital) both of whom have spent their careers investing in, scaling and building high growth technology businesses.
Salary
$140,000 - $220,000
Location
San Francisco, CA
Experience
3+ years
Total raised
$335.0M
Last stage
Series B
Investors
No applications, no recruiter spam. Just the intro.
A few questions to make sure this role is the right shape for you. Two minutes.
I write the intro, send it to the founder, and handle the back-and-forth.
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.