Full Stack Engineer; Delivery Toolkit

Position: Full Stack Engineer (Delivery Toolkit)
Description & Requirements

WHAT MAKES US A GREAT PLACE TO WORK

We are proud to be consistently recognized as one of the world's best places to work. We are currently the top ranked consulting firm on Glassdoor's Best Places to Work list and have earned the #1 overall spot a record seven times.

Extraordinary teams are at the heart of our business strategy, but these don't happen by chance. They require intentional focus on bringing together a broad set of backgrounds, cultures, experiences, perspectives, and skills in a supportive and inclusive work environment. We hire people with exceptional talent and create an environment in which every individual can thrive professionally and personally.

WHO YOU'LL WORK WITH

As the premier consulting partner for the private equity industry, Bain's PEG boasts a global practice that is over three times larger than any competitor. Our network of over 1,000 professionals supports private equity and institutional investor clients through every stage of the investment life cycle, from deal generation and due diligence to portfolio value creation and exit planning.

Bain & Company is developing a suite of cutting-edge data and software solutions designed to revolutionize how the private equity industry uses data for investment insights and decision-making.

The PEG Innovation team's mission is to create analytical solutions for Bain clients, teams, and the broader institutional investor space using proprietary software and data products. This includes the development, commercialization, and daily management of Bain's proprietary datasets, data, and software businesses.

WHERE YOU'LL FIT WITHIN THE TEAM

Full-Stack Engineers in Product Engineering build and maintain the end-user products that PE analysts, associates, and partners use daily, including Deal Screening, Due Diligence workflows, Portfolio Monitoring, Report Builder, and more. You contribute across the full product surface:
Svelte/Sveltekit frontend, concrete API contract surface, and product-specific Node.js/FastAPI services, with guidance from senior engineers. You are expected to deliver production-quality code, write tests for the workflows you build, and partner with Product and Design to translate requirements into reliable user experiences. You collaborate with Cross-team Engineering for shared services (Auth/RBAC, Audit, Notifications, File Service) and work with the Agent / AI as needed to integrate intelligent features safely and correctly.

For this role we weight foundational engineering capability above AI engineering experience. The expected tenure is multi-year, and we believe AI tooling and techniques will continue to shift quickly, while strong programming fundamentals, system design judgement, and the ability to write maintainable, scalable code remain durable. Inside Core Product we treat AI as a co-pilot and tool, not an autopilot and replacement: every AI generated change is expected to be reviewed and validated by the engineer who commits it.

Practical AWS and Dev Ops experience is a strong differentiator, given how heavily our products rely on AWS services, deployment pipelines, and cloud infrastructure day to day.

WHAT YOU'LL DO

Product Feature Delivery Across UI and Services (80%)

* Implement product UI features in Svelte and Type Script by following established component patterns and the shared design system.

* Build and maintain RESTful API functionality under existing schemas and patterns: implement routes, schemas, and client queries/mutations with guidance.

* Implement and maintain product-specific Node.js/FastAPI endpoints using Zod/Pydantic v2 and Postgre

SQL/SQL Alchemy patterns; follow established code conventions and PR standards.

* Write and update migrations for product schemas using safe, backwards-compatible patterns (expand/contract) with review support.

* Integrate with platform shared services correctly (Auth/RBAC, Audit, Notifications, File Service); raise contract issues early and coordinate changes through the team.

* Write unit and integration tests for delivered features (Vitest/RTL for frontend, Jest/pytest for backend); contribute to E2E tests (Playwright) for owned…