Senior Product Engineer

Cosuno

10d

About The Position

Join Cosuno’s Engineering team to own features from the initial problem through production in a platform used by thousands of construction professionals. You will shape solutions and acceptance criteria, design data models and services, and ship across the backend, API, and front end. The role involves solving complex backend challenges involving tenders, bills of quantities, and large volumes of price data; making product and interface decisions using the company design system; and partnering with Product, Design, and Data on strategic initiatives. You will also architect and implement modular packages and services in the monorepo. Cosuno describes its engineering environment as calm, collaborative, and productive, with autonomy for engineers. The team practices trunk-based development and daily releases, uses Cypress end-to-end testing and strict typing, linting, and formatting, and deploys to AWS via Kubernetes using Terraform-managed infrastructure. The company values open discussion, constructive code reviews, and decisions based on the best idea. Cosuno is a fast-growing technology startup developing a digital platform for construction tenders and procurement. Its platform uses artificial intelligence to analyze price data and help construction companies create efficient bids. The company emphasizes diversity and an inclusive work environment.

Requirements

Significant professional experience building, shipping, and maintaining complex web applications.
Strong TypeScript, React, and Node experience.
Comfort working across the full stack.
Experience taking features from loosely defined problems to real users, independently deciding scope and acceptance criteria.
Backend engineering experience designing data models, APIs, and services, with attention to performance, reliability, and maintainability.
Ability to make sound interface decisions without a detailed specification and care for the user experience.
Product mindset, comfort with ambiguity, and focus on user impact.
Strong problem-solving skills, including quickly identifying priorities in complex systems.
Bias for action and willingness to use data to resolve uncertainty.
Excellent communication skills in English.

Nice To Haves

Experience shipping AI-powered features, including LLMs or agents, into a product.
Experience with AWS, Kubernetes, Terraform, and CI/CD pipelines.

Responsibilities

Own customer or business problems through production, defining solutions and acceptance criteria.
Design data models, APIs, and services for complex construction-related data and reliable, scalable operation.
Ship features across backend, API, and front end.
Make product and interface decisions and build interfaces using the company design system.
Partner with Product and Design on strategic initiatives and deliver them in the product.
Collaborate with Product, Design, and Data to turn business problems into shipped features.
Architect and implement modular packages and services in the monorepo.