Senior Full-Stack Engineer

OnHires; Barcelona; A distancia; EUR 94.000 - 129.000; Jornada completa

Descripción de la vacante

A technology startup is seeking a Senior Software Engineer to join their remote team. You will work on a high-impact devtools product, focusing on backend and frontend development. Ideal candidates will have over 8 years of experience and strong expertise in backend technologies like Go or Kotlin. This position offers stock options and a flexible work culture, providing an extraordinary opportunity to shape the platform from the ground up.

Servicios

Stock options

100% remote team

Unlimited PTO

Flexible hours

Formación

• 8+ years of experience in software engineering.
• Strong backend expertise in Go, Kotlin, Java, or Scala.
• Hands-on experience with RESTful APIs and data-heavy applications.
• Familiarity with cloud infrastructure and Kubernetes.

Responsabilidades

• Join the Applications team to build features end-to-end.
• Focus on backend development with frontend skills required.
• Develop internal and public APIs.
• Write well-tested, maintainable code.

Conocimientos

Backend expertise (Go, Kotlin, Java, or Scala)

RESTful APIs and data-heavy applications

Frontend skills (TypeScript)

Cloud infrastructure and Kubernetes

Production-ready features delivery

Developer tools experience

Herramientas

Kubernetes

Terraform

Docker

GCP

PostgreSQL

GitHub Actions

CircleCI

Descripción del empleo

Overview

Remote | Globally Distributed Team

Data Platform / DevTools Product

Full-time | Long-term | Stock Options Included

Why This Role Stands Out

Join a product-driven startup backed by the investors in Zoom, LinkedIn, Uber, and Twitter — a rare opportunity to shape a technically ambitious platform from the ground up.

You’ll work alongside engineers from NASA, AWS, Meta, MIT, and Stanford on a mission-critical devtools product used by engineering and security teams to optimize how software is built and delivered.

As an early team member, you’ll receive a significant equity stake - not just symbolic stock options, but real ownership in a company solving deep technical challenges. It’s a chance to build something meaningful and benefit directly from its success.

What You’ll Work On

• You’ll join the Applications team to build features end-to-end — from data processing and APIs to frontend components like browser extensions and IDE plugins.
• The focus is backend-heavy, but solid frontend skills are required for delivering user-facing developer tools.
• Build and own features across backend, APIs, and frontend
• Develop internal and public APIs
• Integrate with the company’s data platform
• Contribute to browser / IDE plugins and dev-facing tools
• Support CI / CD pipelines and cloud-based delivery
• Collaborate with the infrastructure team (Kubernetes, GCP)
• Write well-tested, maintainable code
• Participate in code reviews and mentor other engineers

Tech Stack

• Primary Backend: Go, Kotlin, Java, or Scala — language flexibility is welcome; JVM experience is especially valued
• Frontend: TypeScript + any modern JS framework (React, Vue, Angular, Svelte — all accepted)
• Infrastructure: Kubernetes, Terraform, Docker, GCP
• Data Layer: PostgreSQL
• DevOps: CI / CD pipelines, GitHub Actions, CircleCI

You Might Be a Great Fit If You Have

• 8+ years of experience in software engineering
• Strong backend expertise (Go, Kotlin, Java, or Scala)
• Hands-on experience with RESTful APIs and data-heavy applications
• Familiarity with cloud infrastructure and Kubernetes
• Solid frontend skills (TypeScript, integration-level — no need for deep UI work)
• Ability to deliver production-ready features end-to-end
• Comfortable working across the stack and switching layers as needed
• Experience with developer tools or data platforms is a plus
• English : Upper-Intermediate or higher

What’s In It for You

• Stock options in a fast-growing, VC-backed startup
• 100% remote team with async-friendly culture
• Collaborate with world-class engineers from NASA, Meta, MIT, AWS
• Work on a high-impact devtools product used by engineering and security teams
• Unlimited PTO and flexible hours
• High ownership, zero micromanagement, no legacy

Interview Process

• Recruiter screening (30 mins)
• CEO interview
• Math interview
• Technical interview #1 (live coding)
• Technical interview #2 (live coding)
• Final interview with CTO / co-founder

Interested?

Apply now or message us directly — we’ll be happy to share more about the role, product, and team. Let’s build something exceptional together.