Weekend Frontend Developer Jobs in Massachusetts

At BBH, Partnership is more than a form of ownership-it's our approach to business and relationships. We know that supporting your professional and personal goals is the best way to help our clients and advance our business. We take that responsibility seriously. With a 200-year legacy and a shared passion for what's next, this is the right place to build a fulfilling career.
About Us
We are on a mission to rebuild how financial services firms create, manage, and execute their data integrations and transformations. Today that process stretches across multiple teams, tools, and handoffs - slow to build, expensive to maintain, and nearly impossible to change. We collapse it into a single AI-native platform that business users can operate without writing a ticket, while engineering teams retain the governance and security controls they require. We're growing our founding team now.
About the Role
As a Frontend Engineer, you'll own the client-side experience of the platform - the interfaces through which financial services users configure integrations, build and execute transformations, monitor workflows, and review results. Our product's promise is that business users can operate it without writing a ticket. That promise lives or dies in the UI you build.
This is a design-collaborative, full-stack-adjacent role. You'll work directly from Figma, own features from Angular component to Python API endpoint, and build data-dense, enterprise-grade interfaces that financial services users trust. The bar for craft is high - our users are experienced, demanding, and will notice if something is ambiguous or slow.
Angular is our framework. TypeScript is how we think. Python is how we reach the backend when a feature needs it.
Responsibilities
Product Engineering

• Build and maintain Angular-based interfaces for the core product: integration configuration, transformation building, workflow monitoring, execution results, and audit log views
• Own features end-to-end - from Figma file through Angular components, Python API endpoints, and production deployment
• Implement and extend the component library in close coordination with the Head of Design and Product Designer
• Build high-performance data views: filterable tables, real-time execution output streams, transformation diff views, and audit logs

Design Collaboration

• Translate Figma designs into production Angular components with high fidelity - using Figma Dev Mode and design tokens as the contract
• Work directly with the design team during the design process - flag constraints early, prototype in code when needed, push quality forward
• Maintain Storybook as the living documentation for the component library

AI-Specific Frontend

• Implement streaming UI patterns for AI-generated transformation outputs - progressive rendering, token-by-token display, interruption and retry handling
• Build interfaces for AI-suggested transformations - multi-step diff views, accept/reject/edit flows, and inline suggestions
• Design and implement feedback mechanisms that capture user corrections and improve AI quality signals

Quality & Security

• Write comprehensive unit and integration tests; maintain confidence through the CI pipeline
• Optimize for Core Web Vitals and application performance - lazy loading, OnPush change detection, virtual scrolling for large datasets
• Apply Angular's built-in security patterns and implement RBAC-aware UI rendering for permission-scoped features
• Build to WCAG 2.1 AA accessibility standards - enterprise customers have compliance requirements

Requirements
Experience

• 4+ years professional frontend engineering
• Has built and shipped features in production SaaS environments

Technical Skills

• Angular - deep proficiency required: components, services, RxJS, reactive forms, lazy loading, standalone components, Angular CDK
• TypeScript - strong TypeScript skills; thinks in types
• Python - comfortable writing backend API endpoints (FastAPI or similar); full feature ownership across the stack
• Figma fluency - Dev Mode, components, design tokens; works directly from design files to production code
• Testing - Jasmine/Jest for unit tests; Cypress or Playwright for integration and E2E
• State management - NgRx, Akita, or comparable reactive state patterns
• Active user of AI coding assistants in daily workflow

Nice to Have

• Streaming UI experience - WebSocket or SSE for real-time data output
• Data visualization - D3.js, Chart.js, or ngx-charts for financial dashboards
• Code editor experience - CodeMirror or Monaco for transformation editing interfaces
• Angular Material or Kendo UI (Telerik) for data-intensive enterprise UIs
• Micro-frontend patterns (Module Federation) or Nx monorepo tooling
• Financial services UI experience - audit trail views, RBAC display logic, compliance-aware interface patterns

Why Join Us

• Category-defining work - AI-native data integration and transformation for financial services doesn't exist yet. You'll help build it from the ground up.
• Enterprise backing, startup speed - The credibility, domain expertise, and runway of an established enterprise combined with the pace of a startup. This is an unusual opportunity.
• Foundational team - You'll be among the first in-house hires. You'll set architecture, culture, and standards - not inherit them.
• Competitive package - Market-rate salary and comprehensive benefits. Equity is available for select roles. Poland-based team members receive private healthcare (Medicover or Luxmed), Multisport card, home office setup budget, and professional development budget.

Salary Range
MA: $85,000 - $130,000 base salary + annual target bonus
NYC/NJ: $90,000 - $135,000 base salary + annual target bonus
BBH and its affiliates' compensation program includes base salary, discretionary bonuses, and profit-sharing. The anticipated base salary range(s) shown above are only for the indicated location(s) and may differ in other locations due to cost of living and labor considerations. Base salaries may vary based on factors such as skill, experience and qualification for the role. BBH's total rewards package recognizes your contributions with more than just a paycheck-providing you with benefits that enhance your experience at BBH from long-term savings, healthcare, and income protection to professional development opportunities and time off, our programs support your overall well-being.
We value diverse experiences. We value diverse experiences and transferrable skillsets. If your career hasn't followed a traditional path, includes alternative experiences, or doesn't meet every qualification or skill listed in the job description, please do go ahead and apply.
About BBH:
Brown Brothers Harriman (BBH) is a premier global financial services firm, known for premium service, specialist expertise, technology solutions and partnership approach to client management. Across Investor Services and Capital Partners, we work with an enviable roster of sophisticated clients who make BBH their first call when they are tackling their hardest challenges. Delivering for our clients and each other energizes us.
We believe that how we do our work is just as important as what we do. We are relentless problem solvers who know our best ideas come from collective debate and development-so we are never possessive about our ideas. Every day we come together as a diverse community of smart and caring people to deliver exceptional service and expert advice-creating success that lasts. No matter where you sit in the organization, everyone is empowered to contribute their ideas. BBHers can pick up the phone and call any colleague, and they are happy to help. Expanding your impact beyond your daily role is part of how we operate as trusted partners to one another.
We believe stability is a competitive advantage, but being stable means having the knowledge, skill, and discipline to evolve, often-pushing the boundaries of innovation. As a private partnership, every investment we make is in the relationships, technologies, products and development we believe are in the long-term interests of our clients and our people. Our long-tenured leaders are experts in their areas and are actively involved in the day-to day business, taking the time to provide guidance and mentoring to build the next generation of BBHers. Because we know, our success begins with yours.
Go to BBH.com to learn more about our rewards and benefits, philanthropy, approach to sustainability or how we support you to thrive personally, physically and financially.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, gender, national origin, age, genetic information, creed, marital status, sexual orientation, gender identity, disability status, protected veteran status, or any other protected status under federal, state or local law.