Senior Product Engineer

Cosuno

. Own customer or business problems end to end through production .

Posted 10/25/2026full-timeRemote • GermanySenior💰 €90,000 - €120,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining complex web applications using TypeScript, React, and Node, while ensuring performance, reliability, and maintainability. Proficient in designing scalable data models and APIs, deploying applications on AWS with Kubernetes, and collaborating effectively with cross-functional teams.

Highest-signal resume keywords

TypeScriptReactNodeAWSKubernetes

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Hard Skills

Web Application DevelopmentData Model DesignAPI DevelopmentFeature ShippingTrunk-Based DevelopmentCypress E2E TestingPerformance OptimizationProblem-Solving in Complex SystemsAcceptance Criteria DefinitionModular Package Architecture

Soft Skills

Excellent Communication SkillsCollaborationDecision-MakingAdaptabilityProblem-Solving

Tools & Technologies

TerraformCI/CD PipelinesDesign SystemsMonorepo ManagementLinting and Formatting Standards

Industry Keywords

Construction DomainAI-Powered FeaturesLLMsAgents

Tech Stack

Tools & technologies

AWSCypressKubernetesNode.jsReactTerraformTypeScript

About the role

Key responsibilities & impact

Own customer or business problems end to end through production
Shape solutions and acceptance criteria
Design data models and services
Ship features across backend, API, and frontend
Design reliable, scalable data models, APIs, and services for complex construction-domain data
Make product and interface decisions using the design system
Partner with Product and Design on strategic initiatives
Collaborate with Product, Design, and Data to translate business problems into shipped features
Architect and implement modular packages and services in the monorepo
Practice trunk-based development with daily releases
Maintain Cypress E2E tests and enforce typing, linting, and formatting standards
Deploy to AWS via Kubernetes with infrastructure managed through Terraform
Participate in open discussions and constructive code reviews

Requirements

What you’ll need

Significant professional experience building, shipping, and maintaining complex web applications
Non-negotiable experience with TypeScript, React, and Node
Comfortable shipping across the whole stack
Experience taking features from loosely defined problems to real users
Ability to decide scope and acceptance criteria independently
Backend engineering depth in data models, APIs, and services
Care for performance, reliability, and maintainability
Sound interface decisions without a detailed specification
Comfortable with ambiguity and product-focused decision-making
Strong problem-solving ability in complex systems
Excellent communication skills in English
Bonus: experience shipping AI-powered features, including LLMs or agents
Bonus: experience with AWS, Kubernetes, Terraform, and CI/CD pipelines

Benefits

Comp & perks

Competitive salary above the market average
Choose to work 100% remotely or from the modern office in Berlin
Flexible working hours
New MacBook Pro
Regular company off-sites and team events
Permanent contract in a stable, well-funded company
Calm, collaborative, and productive engineering environment
Autonomy to do your best work