Hi, I'm Sahil

Led the development of the US Payroll product and the 2 senior engineers on it. Wrote an internal SDK that auto-generated backend APIs and types from our spec, cutting boilerplate across every feature.
Led the migration from SvelteKit to Next.js App Router. Set up the monorepo from scratch and wrote 90% of the new code, including server components, the route structure, and the API layer.
Rebuilt the data and access layer for multi-tenant companies and multi-role users (worker + company user), redesigning schemas and APIs and adding RBAC at the route and resource level.
Owned mission-critical features like Autopay from engineering spec to production, iterating on UX without missing deadlines.
Built two design systems from scratch, one for the core Bolto app, the other for US Payroll. Each has its own component library and design tokens.
Wrote shared dev tooling (ESLint, TypeScript, and Prettier configs plus Husky pre-commit hooks) as internal packages consumed by every frontend and backend app in the monorepo.
Integrated authentication with bearer token + cookie support.
Set up Sentry and PostHog for error tracking and product analytics, with source maps and session replay wired in.
Wrote a strict Content Security Policy and set up automated dependency vulnerability scans on the repo.
Helped the team grow, reviewed PRs, fixed engineering processes, and helped with hiring and onboarding.

Software Engineer

Improved frontend load times by optimizing API responses, reducing payload size by up to 20x and improving Time to Interactive (TTI) across critical user flows.
Scaled contractor invoicing by building unified views to review, approve, and pay invoices, supporting $500K+ in monthly transactions.
Led payroll experience development for employees and contractors, enabling multi-role contracts (W2, contractor, EOR) and workflows including onboarding, invoicing, pay stubs, and tax docs.
Enforced a strict Content Security Policy (CSP), mitigating XSS/clickjacking risks and scoring 100/100 on Mozilla Observatory.
Integrated Check payroll APIs, powering employee creation, payroll runs, pay stub access, and tax history, enabling 8+ new client onboardings and a new revenue stream.
Integrated and extended Monite invoicing with custom line items, discounting, and support for PDF and email formats
Fixed a critical session renewal bug affecting ~7% of onboardings, boosting platform reliability during extended user sessions.
Improved code quality by enhancing static checks, eliminating the need for Greptile and saving $1K+ annually in dev tooling.

Software Engineer

Improved mobile performance scores on Lighthouse by 2x through frontend optimization and codebase refactoring, enhancing load times and interaction quality on low-end devices.
Integrated HubSpot CMS via AWS Amplify, enabling the marketing team to publish content independently, reducing turnaround time and freeing engineers to focus on core product deliveries.
Redesigned mobile-first, fully responsive learner workflows for tests, assignments, and content, improving engagement and retention across web and mobile.
Built v3 of the Mentor Management System, delivering responsive dashboards for mentors to manage queries, assignment reviews, and learner progress, streamlining teaching workflows.

Built multiple products from scratch, including I10 Coder, Sherlock IPA, and a custom-designed Analytics Platform tailored for insurance providers.
Redesigned and migrated Sherlock AI from Django templates to React CSR, achieving 2x faster load times, improved UI consistency, and better code maintainability.
Designed and developed the company website end-to-end, delivering a responsive, SEO-optimized experience with a 100% Lighthouse score across performance, SEO, accessibility, and best practices.
Defined frontend architecture and engineering standards, introducing CI/CD pipelines, scalable guidelines, and best practices to streamline development and deployment.
Deployed products on AWS CloudFront, cutting hosting costs by 10x and improving availability and latency for global users.
Engineered a hybrid SSR/CSR architecture using React and Django, optimizing asset delivery with Nginx, reducing file sizes by 3x and improving First Contentful Paint (FCP).

Software Engineer

Shipped the company's first e-commerce experience end-to-end, launching online sales as a new revenue channel.
Scaled the storefront on a hybrid static + low-code stack, absorbing 20% MoM order growth with zero dedicated backend.
Built an internal ops dashboard for catalog, inventory, and order CRUD, replacing manual spreadsheets and cutting fulfillment time for the founding team.