Senior Software Engineer II, Backend - Intelligence Team

Hubspot; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading customer platform company in Greater London is seeking a Backend Engineer. This role focuses on designing scalable systems to enhance customer experiences through personalized recommendations. Candidates should possess strong engineering skills, ideally in Java or Kotlin, and experience with APIs and distributed systems. Mentorship and making data-driven decisions are key aspects of this role. Join to help shape the future of customer engagement at this innovative firm.

Benefits

Flexible work arrangement

Supportive team culture

Mentoring opportunities

Qualifications

• Strong experience designing backend systems for personalized customer journeys.
• Expertise in Java or Kotlin with a focus on scalable solutions.
• Ability to mentor and guide engineering teams.

Responsibilities

• Design and build scalable backend systems.
• Lead technical direction for recommendation services.
• Collaborate with product teams to enhance customer experiences.
• Improve system reliability and performance.

Skills

Backend engineering expertise

Experience with Java or Kotlin

Building distributed systems

APIs and large-scale personalization services

Understanding microservice architecture

Data-driven decision making

Tools

AWS

GCP

Kafka

Pub/Sub

Job description

London, United Kingdom

885535

About the Team

The Customer Journey Intelligence Backend team builds the foundation for HubSpot’s personalized customer experiences. We power the systems behind smarter onboarding, recommendations, and routing, helping customers get value from HubSpot faster and more intuitively. Our work spans key services like the Tasks Recommendation Service, Route Recommendation Service, Onboarding Engine, and Third-Party Data Sync, which together enable adaptive, data-driven onboarding and everboarding experiences across the platform.

What You’ll Do

• Design and build scalable backend systems that deliver personalized recommendations and adaptive customer journeys.
• Lead the technical direction for services such as the Tasks Recommendation Service, which personalizes onboarding tasks based on each user’s goals and context, and the Route Recommendation Service, which determines the next best step in the customer journey.
• Partner closely with AI, data, and product teams to integrate contextual signals and machine learning models into real-time decisioning systems.
• Collaborate closely with product managers to deeply understand customer needs, pain points, and workflows.
• Translate user problems into technical solutions, ensuring all backend systems genuinely enhance end‑user experiences and deliver real value.
• Improve the scalability, reliability, and performance of our third‑party data integrations and synchronization pipelines.
• Mentor peers and help shape the long‑term technical strategy for the Intelligence product area.
• Has strong backend engineering expertise, ideally in Java (or Kotlin).
• Brings experience building distributed systems, APIs, or large‑scale recommendation or personalization services.
• Champions a product mindset within the engineering team, balancing technical excellence with empathy for the user and business context.
• Understands microservice architecture and cloud infrastructure (AWS or GCP).
• Makes thoughtful, data‑driven decisions and thrives in a fast‑moving environment.
• Cares deeply about building intelligent systems that make complex experiences feel simple for customers.

Bonus Skills

• Experience working with machine learning–powered recommendations or routing engines.
• Familiarity with event‑driven architectures or streaming platforms like Kafka or Pub/Sub.
• Background in customer onboarding, personalization, or journey optimization products.

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. An employer who violates this law shall be subject to criminal penalties and civil liability.

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

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.

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.

HubSpot, Inc. is an equal opportunity employer. As a federal contractor, we take affirmative action to ensure equal opportunity and all candidates are considered without regard to race, color, religion, national origin, age, sex, sexual orientation, gender identity, marital status, ancestry, physical or mental disability, veteran status, or any other legally protected characteristics.

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