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3,118

Junior Software Developer jobs in United Kingdom

Staff Software Engineer, AI Serving (AI Infrastructure)

Hubspot

Greater London
Hybrid
GBP 70,000 - 95,000
Yesterday
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Software Testing Engineer

MBDA

Stevenage
Hybrid
Confidential
Yesterday
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Software Product Engineer

Trades Workforce Solutions

Windsor
Hybrid
GBP 80,000 - 100,000
Yesterday
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Software Engineer - Data Platform

Visa

Greater London
Hybrid
GBP 70,000 - 90,000
Yesterday
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Software Engineer, Platform - Glasgow, United Kingdom

Clutch Canada

Glasgow
Hybrid
GBP 51,000 - 67,000
Yesterday
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Graduate Software Test And Development Engineer

STR Group

Greenwich
On-site
GBP 25,000 - 35,000
2 days ago
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Staff software engineer, AI product

Watershed

Greater London
Hybrid
GBP 60,000 - 80,000
2 days ago
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Senior Staff Software Engineer

Cerebras

Cambridge
On-site
GBP 60,000 - 80,000
3 days ago
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Senior Software Engineer

Rosenxt

Bristol
Hybrid
GBP 60,000 - 80,000
4 days ago
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Senior Associate - Software Engineer

Pfizer

Reigate and Banstead
Hybrid
GBP 40,000 - 60,000
4 days ago
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Senior Robotics Software Engineer - Hybrid (Bristol)

Rosenxt

Bristol
Hybrid
GBP 60,000 - 80,000
4 days ago
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Full Stack Software Engineer

Engineered Arts LLC

Greater London
On-site
GBP 50,000 - 70,000
5 days ago
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Full Stack Software Engineer

Engineered Arts LLC

Falmouth
On-site
GBP 50,000 - 70,000
5 days ago
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Field IT Support Technician – North West (Hands-On)

Pioneering People

United Kingdom
On-site
GBP 30,000
Today
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Cloud Firmware Engineer — Python, Kubernetes, Terraform

Delta Controls Inc.

England
Hybrid
GBP 48,000 - 60,000
Today
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PHP Developer

Get-Recruited (UK) Ltd

Leeds
On-site
GBP 30,000 - 42,000
Today
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Android Developer/Kotlin Developer

The Talent Locker

Cheltenham
Hybrid
GBP 80,000 - 100,000
Today
Be an early applicant

2nd Line IT Technician

THE PRIORY LEARNING TRUST

Weston-super-Mare
On-site
GBP 25,000 - 35,000
Today
Be an early applicant

IT Support Technician

AmerisourceBergen

Castle Cary
Hybrid
GBP 25,000 - 35,000
Today
Be an early applicant

Senior Electronics Design Engineer - Firmware & Embedded

WA Consultants

England
On-site
GBP 40,000 - 60,000
Today
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IT Technician [Ref: NBK8951]

Oxford City Council

Worthing
On-site
GBP 27,000 - 31,000
Today
Be an early applicant

ERP & SQL Applications Developer — Hybrid, SC Eligible

Gold Group

Cannock
Hybrid
GBP 80,000 - 100,000
Today
Be an early applicant

Senior C++ Engineer - Edge Networking & Security

Edison Hill Search

City Of London
On-site
GBP 80,000 - 100,000
Today
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Sr Analyst I Cloud App Dev3

DXC Technology

Manchester
On-site
GBP 45,000 - 60,000
Today
Be an early applicant

On-Site C# Developer — Modernize & Collaborate

Proactive Appointments

Northampton
On-site
GBP 80,000 - 100,000
Today
Be an early applicant

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Staff Software Engineer AI Serving (AI Infrastructure)
Hubspot
Greater London
Hybrid
GBP 70,000 - 95,000
Full time
Yesterday
Be an early applicant

Job summary

A leading AI-powered customer platform is seeking a Staff Software Engineer to join its AI Serving team in London. In this role, you will develop and enhance infrastructure for AI model deployment and serve as a key contributor to improve performance and efficiency. Ideal candidates will have strong experience in infrastructure projects, collaborative problem-solving abilities, and a background in Python or Java. This position offers the flexibility to work from home, in the office, or a blend of both.

Benefits

Flexible work locations
Opportunities for mentorship
Access to AI resources and technologies

Qualifications

  • Proven track record in infrastructure projects at scale.
  • Ability to work cross-team solving broad problems.
  • Experience mentoring and onboarding new team members.
  • Strong programming fundamentals, particularly in Python.

Responsibilities

  • Write production code powering AI capabilities at HubSpot.
  • Lead model serving and inference infrastructure enhancement.
  • Set technical direction for ML model deployment.
  • Collaborate with teams across HubSpot for deployment efficiency.

Skills

Leadership in infrastructure projects
Collaborative problem solving
Mentorship experience
Comfort with ambiguity
Experience with Python

Tools

Python
Java
Job description
All Open Positions
Staff Software Engineer, AI Serving (AI Infrastructure)
Engineering
Flex - London, United Kingdom
POS-22139

This role can be Office/Hybrid/Remote based within the UK

HubSpot is at the forefront of empowering businesses with cutting-edge AI. We are seeking a Staff Software Engineer with a passion for infrastructure and developer experience to join our AI Serving team. The AI Serving team owns model inference and serving infrastructure end-to-end, ensuring AI models are reliably deployed, scaled, observed, and cost-efficient across all hublets and environments, while serving as the home for modern Python at HubSpot.

The team owns the serving frameworks and libraries that power synchronous, asynchronous, and offline inference, along with model deployment pipelines, autoscaling, and GPU/CPU resource management. The roadmap focuses on improving the reliability and efficiency of batch inference, strengthening model observability, and scaling AI infrastructure cost-effectively. The team also serves as the home for core Python libraries and tooling across HubSpot.

As a Staff Software Engineer on the AI Serving team you will:

  • Write and ship production code that directly powers AI capabilities across HubSpot, a crucial building block for user and business impact at scale
  • Lead the evolution of our model serving and inference infrastructure, improving reliability, scalability, and cost-efficiency
  • Set technical direction for how HubSpot deploys and operates ML models at scale, guiding decisions on architecture, cost optimization, and developer experience
  • Work closely with Machine Learning Engineers, Product Software Engineers, and other Infrastructure teams to streamline model deployment and serving
  • Gain deep exposure to a wide range of HubSpot infrastructure systems through building and maintaining core Python libraries, an excellent opportunity to learn how HubSpot operates under the hood
  • Collaborate with HubSpotters across the company in engineering, product, design, research, marketing, sales, etc., gaining exposure to how HubSpot works as a business
  • Be empowered to show up as your authentic self and choose a work style and location where you can do your best work, whether that’s at home, in an office, or a blend of the two

We’re not just looking for engineers with many years of experience. We’re looking for engineers who show unique excellence, leadership, and the ability to elevate those around them.

We work with Python and Java primarily, but experience with specific technologies is secondary to strong programming fundamentals. Check out our engineering blog to learn more.

What we’d like to see:

  • A proven track record of directly contributing to and leading infrastructure projects at scale, ideally in serving, deployment, or platform engineering
  • The ability to work collaboratively with the team to solve problems, transfer knowledge, and develop overall platform architecture
  • The ability to work effectively across teams, driving technical initiatives spanning multiple groups within AI Infrastructure and beyond
  • Comfort with ambiguity: you can take on broad, cross-team problems and drive them to resolution without waiting for every detail to be specified
  • Coaching and mentorship experience
  • A track record in partnering successfully with recruiting to build remarkable engineering teams
  • Bonus: Python expertise. Experience with Python tooling, libraries, and developer experience is a strong plus, given the team’s role in stewarding Python across AI workloads at HubSpot

We know the confidence gap and impostor syndrome can get in the way of meeting spectacular candidates, so please don’t hesitate to apply — we’d love to hear from you.

If you need accommodations or assistance due to a disability, please reach out to us using this form.

At HubSpot, we value both flexibility and connection. Whether you’re a Remote employee or work from the Office, we want you to start your journey here by building strong connections with your team and peers. If you are joining our Engineering team, you will be required to attend a regional HubSpot office for in-person onboarding. If you join our broader Product team, you’ll also attend other in-person events, such as your Product Group Summit and other gatherings, to continue building on those connections.

If you require an accommodation due to travel limitations or other reasons, please inform your recruiter during the hiring process. We are committed to supporting candidates who may need alternative arrangements.

Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.

Germany Applicants: (m/f/d) - link to HubSpot's Career Diversity page here.

India Applicants: link to HubSpot India's equal opportunity policy here.

About HubSpot

HubSpot (NYSE: HUBS) is an AI-powered customer platform with all the software, integrations, and resources customers need to connect marketing, sales, and service. HubSpot’s connected platform enables businesses to grow faster by focusing on what matters most: customers.

At HubSpot, bold is our baseline. Our employees around the globe move fast, stay customer-obsessed, and win together. Our culture is grounded in four commitments: Solve for the Customer, Be Bold, Learn Fast, Align, Adapt & Go!, and Deliver with HEART. These commitments shape how we work, lead, and grow.

We’re building a company where people can do their best work. We focus on brilliant work, not badge swipes. By combining clarity, ownership, and trust, we create space for big thinking and meaningful progress. And we know that when our employees grow, our customers do too.

Recognized globally for our award-winning culture by Comparably, Glassdoor, Fortune, and more, HubSpot is headquartered in Cambridge, MA, with employees and offices around the world.

Explore more:

  • HubSpot Careers
  • Life at HubSpot on Instagram

HubSpot may use AI to help screen or assess candidates, but all hiring decisions are always human. More information can be found here. By submitting your application, you agree that HubSpot may collect your personal data for recruiting, global organization planning, and related purposes. Refer to HubSpot’s Recruiting Privacy Notice for details on data processing and your rights.

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* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.

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