Software Engineer, Infrastructure (Staff)

Lightfield; Cambridge (MA); On-site; USD 150,000 - 300,000; Full time

Benefits offered by this job

Competitive salary

Meaningful early equity

Health insurance

3 weeks of PTO

11 paid company holidays

3 months of paid family leave

Wednesdays work from home

Regular team dinners

401k plan

Commuter and lunch stipend

Job summary

Lightfield in Cambridge, Massachusetts, seeks a skilled engineer to architect and scale their AI-driven CRM system. Responsibilities include full-stack development, data modeling, and mentoring team members. Candidates should have 3+ years of experience and a degree in Computer Science.

The position offers a competitive salary ranging from $150K to $300K, along with generous benefits, including health insurance, PTO, and equity opportunities, making it an attractive role for tech professionals.

Qualifications

• 3+ years of experience in software development.
• Strong background in infrastructure, data modeling, and backend systems.
• Deep experience building scalable data infrastructure.

Responsibilities

• Build and maintain full-stack systems.
• Architect and scale data infrastructure and backend services.
• Design and optimize data models for CRM workflows.
• Develop observability and metrics for system operations.
• Mentor teammates and shape engineering culture.

Skills

Software development

Infrastructure

Data modeling

Backend systems

PostgreSQL

TypeScript

React

Node.js

Apollo GraphQL

Education

Degree in Computer Science or related field

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.

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.

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

• 3+ 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 a 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: $150K - $300K