Senior Full-Stack Engineer, TypeScript, AI

eventfirst

. Build and improve features across the frontend, backend and database from product discussion through release and ongoing maintenance .

Posted 9/30/2026full-timeRemote • GermanySeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining production web products across frontend, backend, and database, with a strong focus on AI features and workflows. Proficient in designing clear data models and ensuring software security, reliability, and maintainability.

Highest-signal resume keywords

Production Web Product DevelopmentAI Agent DevelopmentTypeScript and React ProficiencyCoding Agent VerificationUser-Centric Feature Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Frontend DevelopmentBackend DevelopmentDatabase ManagementAI WorkflowsPrompt EngineeringTool CallingFailure HandlingData Model DesignSoftware SecurityQuality Evaluation

Soft Skills

Clear CommunicationIndependent Work

Tools & Technologies

TypeScriptReactNext.jsTailwind CSSDrizzleNeonVercel

Industry Keywords

Open-Source ContributionsUser Needs AnalysisSoftware MaintainabilityTechnical Decision MakingUX Design

Tech Stack

Tools & technologies

JavaScriptNext.jsReactTypeScript

About the role

Key responsibilities & impact

Build and improve features across the frontend, backend and database from product discussion through release and ongoing maintenance
Work with event experts and founders to understand user needs and shape practical solutions
Build and evaluate AI features and workflows
Define good results, investigate failures and turn real examples into regression tests
Make architectural decisions with the team
Keep the product secure, reliable and maintainable
Use coding agents where helpful and review and verify the resulting software
Present a project worked on during the technical conversation and discuss technical decisions, product and UX choices, trade-offs and lessons learned

Requirements

What you’ll need

Experience shipping and maintaining production web products across frontend, backend and database
Experience building AI agents or workflows using prompt engineering, tool calling and failure handling
Experience building evaluations from representative examples to measure quality, investigate failures and test improvements
Ability to design clear data models and choose simple architecture
Experience using coding agents and verifying their output for correctness, security and maintainability
Ability to turn user needs into practical features with clear, usable interfaces
Ability to work independently and communicate clearly in spoken and written English
Experience with TypeScript and React strongly preferred
Experience operating AI agents or workflows in production, including monitoring quality, managing latency and cost, and recovering from failures
Experience with Next.js, Tailwind CSS, Drizzle, Neon or Vercel nice to have
Experience turning domain experts' knowledge into software nice to have
Open-source contributions nice to have
No fixed number of years of experience required; demonstrated skill is valued
Contract arrangement depends on location; freelance contract may apply where the employer has no legal entity
Fluent/working proficiency in English

Benefits

Comp & perks

Fully remote work
Competitive compensation
Substantial ownership and visibility into product decisions
Direct feedback from experienced event experts
Opportunity to shape the product, architecture and engineering culture
Work alongside senior engineers and experienced founders