Staff Software Engineer

Who we are

At Fluxon, we believe that how you build matters as much as what you build. We help businesses navigate their most important technology decisions with confidence, and take responsibility for seeing them through. Founded by ex-Googlers and startup veterans, we’re proud to partner with teams behind some of the most ambitious products, including Google, OpenAI, Anthropic, Walmart and Stripe.

Our work spans strategy, design, and engineering — often in complex, AI-driven environments — where clarity, speed and quality are the standard. We use AI intentionally, applying it only where it adds real value and expands what’s possible. Care shapes everything we do.

Inside Fluxon, you’ll find a global, remote-first team of experienced builders, who are curious, kind and serious about their craft. We’re building a place where people can take ownership, solve problems that matter and do work they’re proud to stand behind. If you want to do your best work alongside people who care as much as you do, you’ll feel at home here.

Note: This position is fully remote and open to candidates based anywhere in Portugal.

About the role

As a Staff Software Engineer at Fluxon, you'll drive the end-to-end delivery of products to market while learning, contributing, and growing in partnership with our leadership team

You'll be responsible for:

Guiding project delivery all the way to the user, leading projects, building and iterating in a dynamic environment

Partnering directly with clients to understand their needs, and achieve business goals

Defining product requirements, identifying appropriate system designs and planning development in partnership with our Product and Design teams

Supporting development of a healthy and effective engineering culture

You'll work with a diversity of technologies, including:

Languages

TypeScript/JavaScript, Java, .Net, Python, Golang, Rust, Ruby on Rails, Kotlin, Swift

Frameworks

Next.js, React, Angular, Spring, Expo, FastAPI, Django, SwiftUI

Cloud Service Providers

Google Cloud Platform, Amazon Web Services, Microsoft Azure

Cloud Services

Compute Engine, AWS Amplify, Fargate, Cloud Run

Apache Kafka, SQS, GCP CMS

S3, GCS

Technologies

AI/ML, LLMs, Crypto, SPA, Mobile apps, Architecture redesign

Google Gemini, OpenAI ChatGPT, Vertex AI, Anthropic Claude, Huggingface

Databases

Firestore(Firebase), PostgreSQL, MariaDB, BigQuery, Supabase

Redis, Memcache

Qualifications

7+ years of industry experience in software development

Experience leading development through the full product lifecycle, including CI/CD, testing, release management, deployment, monitoring and incident response

Fluent in the design and implementation of scalable system architectures, data structures and algorithms, and effective development practices

What we offer

Remote-first, flexible work with a budget to set up a work space that works for you

Localized healthcare coverage to support you and your family’s wellbeing

Flexible paid