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Backend Engineer - Extensions

Remote, Europe +3·Full-time·Added 3 months ago

This job was published 3 months ago

Fundamental

12 open roles

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Overview

Job details

Full-time hours
Per the ad.
Fully remote
Per the ad.
A relocation package
Help with the move, per the ad.
Relocation help
Indicative — the ad doesn’t promise sponsorship.

Requirements

Work in English
English is required, per the ad.
Have 5+ years of experience
Mid-level role.

Pay & benefits

What you'll get

Competitive compensation with salary and equity
Comprehensive health coverage for you and your dependents
Paid parental leave for all new parents, inclusive of adoptive and surrogate journeys
Relocation support for employees moving to join the team in one of our office locations
A mission-driven, low-ego culture that values diversity of thought, ownership, and bias toward action

Requirements

Nice to have

Hands-on experience with workflow orchestration systems such as Temporal, Dramatiq, Celery, or equivalent
Familiarity with ML infrastructure or experience working alongside data science teams
Experience with high-throughput data processing pipelines
Exposure to Kubernetes and container-based deployment environments
Background in performance profiling and optimization of Python services

The role

In this role, you'll develop, and productize data science capabilities that enhance and expand our product performance on real enterprise use cases - working across a wide range of prediction tasks, data types, and business domains. You'll go deep on hard data science problems, collaborate closely with R&D on product capabilities, and ship production-grade work that has a direct impact on Production use cases.

Key responsibilities

What you'll do

Own the reliability, performance, and scalability of Extensions capabilities end to end
Design and build distributed workflows that are efficient, reproducible, and observable in production
Collaborate closely with Data Scientists on the team to deeply understand requirements and translate them into engineering decisions
Identify and resolve performance bottlenecks, ensuring Extensions capabilities meet the latency and throughput demands of enterprise deployments
Contribute to architectural decisions around how Extensions integrates with the broader NEXUS backend
Write clean, well-tested Python code and hold a high bar for code quality across the team
Contribute to internal engineering documentation and help establish best practices for backend development within the team

Must have

5+ years of backend engineering experience, with a strong focus on Python
Excellent Python skills - you write clean, idiomatic, well-tested code and know the language deeply
Solid experience designing and operating distributed systems at production scale
Strong understanding of concurrency, task execution, and workflow orchestration patterns
Experience building systems that are reproducible, observable, and easy to debug in production
Ability to work closely with non-engineering counterparts and translate complex requirements into reliable implementations
Strong ownership mindset - you drive work end to end and care about outcomes, not just output

About Fundamental

Fundamental is a London-based AI research and engineering company that develops advanced machine learning systems and developer tools. The company focuses on applied AI, bridging cutting-edge research with production-grade engineering to build products that serve developers and enterprises. Its team is composed of researchers, ML engineers, and software engineers working on model serving, MLOps, and applied AI challenges.

Fundamental is expanding its engineering and research presence in Spain, with a dedicated hub that hosts roles across ML research, MLOps, backend, and full-stack development. The company offers a research-driven culture with a strong emphasis on technical excellence, making it an attractive destination for international engineers and researchers looking to work on challenging AI problems while based in Spain.

Employees: 11–50
Headquarters: London, UK

Good to know if you are moving

Fundamental is headquartered in London, UK, and is expanding its engineering hub in Spain, offering international professionals the chance to work on AI research and applied engineering from Spain.
The company's open roles in Spain span ML research, MLOps, backend, and full-stack engineering, indicating a strong focus on technical and research-oriented positions.
As a smaller, research-driven company, Fundamental likely offers a collaborative environment with direct impact on product decisions, appealing to engineers seeking meaningful contributions.
The Spain office appears to be a key part of the company's growth strategy, with multiple team lead roles (e.g., MLOps Team Lead, DevOps Team Lead) suggesting opportunities for career advancement.

In their own words

About the company & team

Fundamental is an AI company pioneering the future of enterprise decision-making. Founded by DeepMind alumni, Fundamental has developed NEXUS - the world's most powerful Large Tabular Model (LTM) - purpose-built for the structured records that actually drive enterprise decisions. Backed by world class investors and trusted by Fortune 100 companies, Fundamental unlocks trillions of dollars of value by giving businesses the Power to Predict.

At Fundamental, you'll work on unprecedented technical challenges in foundation model development and build technology that transforms how the world's largest companies make decisions. This is your opportunity to be part of a category-defining company from the ground-up. Join the team defining the future of enterprise AI.

All open roles at Fundamental