Staff Infrastructure Software Engineer

Tome; Cambridge; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Meaningful equity

3 weeks PTO

Health insurance (medical, dental, vis

11 paid holidays + winter break

Team events and offsites

Remote Wednesdays

Paid family leave (3 months)

401k plan

Commuter and lunch stipend

Job summary

Lightfield is seeking an experienced engineer to architect, build, and scale core infrastructure and systems powering our AI-driven CRM. You will design scalable data models and end-to-end backend services to support complex customer workflows, ensuring performance, reliability, and observability.

We value candidates who thrive in ambiguity, communicate clearly, and mentor teammates. The role offers hybrid work, meaningful equity, and opportunities to shape our engineering culture in a

Qualifications

• 3+ years of software development experience with infrastructure, data modeling, and backend systems.
• Ability to design and scale data infrastructure for CRM workflows.

Responsibilities

• Architect and scale data infrastructure and backend services powering Lightfield’s AI-driven CRM.
• Build and maintain full-stack systems end-to-end for reliability and performance.
• Design and optimize data models to support CRM workflows and AI-driven insights.
• Develop observability and metrics for proactive issue detection and continuous improvement.
• Mentor teammates, participate in code reviews, and shape engineering culture and practices.
• Contribute to building a world-class engineering team through recruiting and knowledge-sharing.

Skills

Data modeling

Backend systems

Communication

Mentorship

Education

Bachelor's degree in Computer Science or related field

Tools

TypeScript

React

Next.js

Node.js

Apollo GraphQL

PostgreSQL

Job description

• At Lightfield, engineers take ownership of projects from inception to impact, collaborating across functions and pushing the envelope on what’s possible in applied AI and data systems
• You’ll play a critical role in designing and building the data models and infrastructure that support a next-generation CRM, ensuring our system is performant, scalable, and resilient
• Build and maintain full-stack systems, end-to-end, ensuring reliability, scalability, and performance
• Architect and scale the data infrastructure and backend services that power Lightfield AI-driven CRM
• Design and optimize data models to support CRM workflows, customer interactions, and AI-driven insights
• Develop observability and metrics to enable smooth operation, proactive issue detection, and continuous improvement
• Mentor teammates, participate in code reviews, and help shape engineering culture and practices
• Contribute to building a world-class engineering team through recruiting, mentorship, and knowledge-sharing

Benefits

• Meaningful early equity
• 3 weeks of PTO
• Health insurance (medical, dental, vision)
• 11 paid company holidays + we enjoy a winter holiday break
• Regular team dinners, events, offsites, and retreats
• Wednesdays work from home
• 3 months of paid family leave
• 401k plan
• Other perks include: commuter and lunch stipend

We’re looking for an experienced, creative, and versatile engineer who is eager to tackle the challenge of architecting, building, and scaling the core infrastructure and systems powering Lightfield’s AI-driven CRMDeep experience building scalable, high-performance data infrastructure that can support complex customer workflows and large-scale data processing3+ years of experience in software development, with a strong background in infrastructure, data modeling, and backend systemsThrives in ambiguity, able to independently drive projects and deliver results in a fast-moving environmentYou have the ability to ramp quickly on tech stack that features TypeScript, React, Next.js, Node.js, Apollo GraphQL, and PostgreSQLStrong fundamentals in software engineering, with a degree in Computer Science or a related fieldPassionate about building products customers love, ensuring our CRM is intuitive, intelligent, and indispensableYou’re excited about Large Language Models (LLMs) and the opportunity to build systems that support and leverage themStrong understanding of database design, indexing strategies, and query optimization, especially in PostgreSQL or similar relational databasesClear communicator, capable of articulating technical decisions to both technical and non-technical stakeholders