Senior Full-Stack Engineer – AdTech Data Platform

Twine; Schweiz; On-site; CHF 130,000 - 190,000; Full time

Job summary

Twine, a leading freelance marketplace, seeks a seasoned software engineer to own features across a TypeScript monorepo spanning React front ends, Node.js services, and ETL pipelines for advertising data.

You will design, optimize, and operate data-intensive workloads to ensure reliability and performance at scale, collaborating with peers to uphold code quality and best practices in a fast-paced AdTech environment. This is a full-time role based in Switzerland.

Qualifications

• 7+ years of professional software engineering experience.
• Advanced proficiency in TypeScript, Node.js, and React.
• Strong experience with SQL/OLAP databases and analytical query optimization.
• Hands-on expertise with ClickHouse, MongoDB, Redis, and BullMQ.
• Familiarity with CI/CD pipelines and automated testing frameworks.
• Excellent English communication skills, both written and verbal.
• Experience in AdTech, PostgreSQL, edge runtimes, Go, production ML, or agentic development tooling is a plus.

Responsibilities

• Develop and maintain scalable features across React front ends and Node.js backend services within a TypeScript monorepo.
• Design, optimize, and operate ETL pipelines and data-heavy workloads using ClickHouse, MongoDB, Redis, and queue-based processing (BullMQ).
• Ensure reliable CI/CD, background job processing, real-time data delivery, and high-performance analytical queries.
• Uphold engineering quality through comprehensive testing (unit, integration, snapshot, screenshot, end-to-end).
• Conduct code reviews and provide architectural input to guide technical decisions.
• Troubleshoot and resolve production issues, ensuring system reliability and scalability.
• Collaborate with cross-functional teams to deliver robust solutions for advertising data processing.

Skills

TypeScript

Node.js

React

SQL/OLAP

ClickHouse

MongoDB

Redis

BullMQ

CI/CD

Testing frameworks

English

AdTech

PostgreSQL

Go

Edge runtimes

Tools

BullMQ

PostgreSQL

Go

Job description

Twine, a leading freelance marketplace, seeks a seasoned software engineer to own features across a TypeScript monorepo spanning React front ends, Node.js services, and ETL pipelines for advertising data.

You will design, optimize, and operate data-intensive workloads to ensure reliability and performance at scale, collaborating with peers to uphold code quality and best practices in a fast-paced AdTech environment. This is a full-time role based in Switzerland.