Senior Frontend Engineer (React/TypeScript)

About CONXAI

CONXAI has built an agentic AI platform for the Architecture, Engineering and Construction (AEC) and physical industries, focused on knowledge-automation . We automate high-stakes, knowledge-intensive workflows traditionally trapped in siloed data, fragmented tools and tacit (undocumented) human expertise.

Our multi-agent systems perform complex reasoning in the physical world; and transform bespoke, service-heavy processes into scalable Service-as-a-Software automation.

CONXAI is trusted by some of the leading AEC companies in Europe, US, LATAM and Japan.

Your Role

As a Senior Frontend Engineer , you will play a key role in shaping and evolving a modern, scalable frontend architecture within a complex B2B AI platform.

You won’t just implement features — you’ll design systems. You’ll think in terms of structure, boundaries, and long-term sustainability. Your focus will be on building robust, maintainable solutions that can grow with the product and the organization.

This role is ideal for someone who:

Takes ownership of architectural decisions

Values clean abstractions and clear domain boundaries

Thinks beyond short-term delivery toward long-term scalability

Enjoys collaborating across teams to align technical direction

Sees frontend engineering as system design, not just UI implementation

You will influence how the frontend evolves, contribute to technical standards, and help ensure the platform remains scalable, testable, and maintainable as it grows.

What You’ll Do

Architect & Build at Scale

Develop complex B2B features using React 18 + TypeScript

Work within a structured Feature-Sliced Design (FSD) architecture

Design clean domain boundaries and public APIs between layers

Build reusable features, widgets, and domain entities

Maintain architectural integrity using dependency rules and validation tools

Deliver High-Quality Code

Write type-safe, production-grade TypeScript

Implement unit & integration tests (Jest, React Testing Library)

Optimize performance, bundle size, and rendering efficiency

Implement robust error handling and monitoring

Build Advanced Product Capabilities

Implement efficient server-state management with TanStack Query

Work on complex UI patterns

Collaborate on AI feature integration (LLM workflows, structured outputs)

Collaborate & Lead

Work closely with backend engineers on RESTful APIs

Contribute to architectural decisions and technical planning

Conduct thoughtful code reviews

Mentor mid/junior engineers on architecture and best practices

Our Tech Stack

React 18 + TypeScript 5.5+

Feature-Sliced Design (layered architecture)

TanStack Query + Zustand

Material-UI (MUI v5) + Emotion

SCSS Modules

Webpack 5

AWS Amplify & Cognito

Jest + React Testing Library + MSW

CI/CD pipelines with automated testing

What We’re Looking For

Required

5+ years of professional frontend experience

Advanced React & TypeScript expertise

Strong architectural thinking (FSD, Clean Architecture, or similar)

Experience with modern state management

Strong testing mindset (unit & integration)

Experience integrating REST APIs

Strong written and verbal English communication skills

High standards for code quality and maintainability

Highly Valued

Experience building complex B2B SaaS products

Knowledge of scalable frontend architecture patterns

Experience with performance optimization

Experience with AWS (Cognito / Amplify / S3 / CloudFront)

Experience in AEC, construction, or document-heavy domains

Exposure to AI/ML integrations in frontend applications

PDF rendering or document processing experience

Why CONXAI

Edge of Innovation: Be at the absolute forefront of AI in the construction tech space

High Autonomy: Own the product strategy and shape a product that directly impacts the industry

Top-Tier Peer Group: Work with a global team of ML engineers, software engineers and industry practitioners

Equity & Scale: Competitive compensation with significant equity upside

**Applications for "Remote work" will not be accepted**