Software Engineer, Infrastructure (Staff)

Lightfield; Cambridge (MA); On-site; USD 220,000 - 300,000; Full time

Benefits offered by this job

Competitive salary

Early equity

Health insurance

PTO 3 weeks

Holidays + winter break

Family leave

WFH Wednesdays

401k plan

Commuter stipend

Job summary

Lightfield is hiring an experienced engineer to architect and scale the data infrastructure powering its AI-driven CRM. You will own data models, backend services, and system observability to support complex customer workflows at scale.

You’ll work across teams to deliver reliable, high-performance solutions while mentoring teammates and shaping engineering culture in a fast-moving environment.

Qualifications

• 7+ years of software development experience with a focus on infrastructure and backend systems.
• Strong data modeling, database design, and query optimization skills.
• Experience with LLM-driven architectures and scalable data platforms.
• Proficiency with TypeScript, React, Next.js, Node.js, GraphQL, and PostgreSQL.

Responsibilities

• Architect and scale core data infrastructure powering Lightfield's CRM.
• Design data models and backend services for scalable, AI-powered workflows.
• Build reliable, observable systems with strong performance characteristics.
• Mentor team members and contribute to engineering culture and practices.
• Collaborate across teams to recruit, onboard, and grow the engineering function.

Skills

Backend systems

Data modeling

TypeScript

React

Next.js

Node.js

LLMs

Communication

Education

Bachelor's in Computer Science

Tools

PostgreSQL

Apollo GraphQL

Job description

About Lightfield

Lightfield is an AI-native CRM that assembles itself from your email, calendar, and meetings. It captures every interaction and turns it into organized context: accounts, tasks, follow-ups, and insights, so nothing slips through the cracks.

Lightfield is an AI-native CRM that assembles itself from your email, calendar, and meetings. It captures every interaction and turns it into organized context: accounts, tasks, follow-ups, and insights, so nothing slips through the cracks.

We're rethinking CRM from first principles. Instead of forcing teams to maintain rigid systems, Lightfield learns from how companies actually work, adapting, automating, and surfacing the insight that drives growth.

We're building the CRM platform we always wished existed: fast, intelligent, and genuinely helpful.

The market agrees. Over 5,000 companies have used Lightfield since we launched in November, making us the fastest-adopted product in our category. We are backed by Greylock, Lightspeed, and Coatue, and our founders previously built Tome, a generative AI presentation product used by over 25 million people. Before Lightfield, our team worked on Llama, Instagram, Facebook Messenger, Pinterest, Google, and Salesforce.

About The Role

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 CRM.

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.

What you’ll do

• 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.

Who you are

• 7+ years of experience in software development, with a strong background in infrastructure, data modeling, and backend systems.
• Deep experience building scalable, high-performance data infrastructure that can support complex customer workflows and large-scale data processing.
• Strong understanding of database design, indexing strategies, and query optimization, especially in PostgreSQL or similar relational databases.
• You're excited about Large Language Models (LLMs) and the opportunity to build systems that support and leverage them.
• You have the ability to ramp quickly on tech stack that features TypeScript, React, Next.js, Node.js, Apollo GraphQL, and PostgreSQL.
• Strong fundamentals in software engineering, with a degree in Computer Science or a related field.
• Thrives in ambiguity, able to independently drive projects and deliver results in a fast-moving environment.
• Clear communicator, capable of articulating technical decisions to both technical and non-technical stakeholders.
• Passionate about building products customers love, ensuring our CRM is intuitive, intelligent, and indispensable.

Benefits & Perks

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

Compensation Range: $220K - $300K