Backend Engineer, Primitives

Lapel; San Francisco (CA); On-site; USD 100,000 - 150,000; Full time

Benefits offered by this job

Medical, dental, vision benefits

Competitive salary and equity

Daily lunch and snacks

Generous time off policy

Job summary

Lapel is seeking a Backend Engineer to design foundational models and workflows crucial for product experiences. The ideal candidate will have over 3 years of software engineering experience and be adept at simplifying complex systems while ensuring they remain customer-focused.

This role involves working with TypeScript, React, and Node.js, where your contributions will be instrumental in shaping the future of customer interaction platforms. Join us in making every customer experience seamless!

Qualifications

• 3+ years of backend or software engineering experience.
• Track record of designing systems others build on.
• Strong judgment in simplifying and prioritizing systems.

Responsibilities

• Build reliable and extensible object models and workflows.
• Design an extensibility model for customer use.
• Decide on defaults and configurable options for the product.

Skills

Backend or software engineering experience

Designing APIs and data models

Customer-focused approach

Proactive and detail-oriented

Tools

TypeScript

React

Node.js

Postgres

Job description

At Lapel, we believe the most hospitable companies win. We're building the data, infrastructure, and tools that help customer-facing teams understand every customer and act on that insight at scale throughout the entire customer lifecycle.

Most internet businesses want to treat customers well, but their tools work against them. We’re building the layer that makes every interaction feel personal again: unifying context, coordinating action, and closing the gap between intent and experience.

It’s a technically ambitious challenge spanning data infrastructure, AI, and systems design – with a deeply human outcome: helping software companies serve people better. We call it hospitality at scale.

We’re well-funded, backed by top-tier investors, and already working with incredible companies, from fast-growing startups to large enterprises. We’ll share more details when we talk.

About This Role

At the core of Lapel are well thought-out and abstracted primitives. You'll own the object models, contracts, and abstractions that every product experience is built on top of: customer records and threads, workflows, permissions, and actions.

Great primitives make Lapel feel powerful, coherent, and obvious. Poor primitives lead to complexity everywhere else. You’ll be responsible for making the foundations simple enough to build on, flexible enough for enterprise customers, and opinionated so that Lapel never becomes a blank canvas.

What You’ll Do

• Build the state, history, permissioning, and event models that make every Lapel primitive reliable and extensible

• Design an extensibility model that gives customers power without turning Lapel into an unstructured blank canvas

• Make primitives usable by both people and agents, with clean actions, histories, permissions, and memory surfaces

• Help decide what should become a Lapel default, what should be configurable, and what should remain fully custom

Our Stack

Lapel is built end-to-end in TypeScript in a single monorepo.

• React, Vite, and Tailwind on the frontend;

• Node.js and Postgres on the backend;

• Temporal and Pulsar to power orchestration.

We ship quickly, and care about creating a developer experience where anyone can prototype, experiment, and get ideas into production fast.

You’ll Thrive in This Role If You

• Have 3+ years of backend or software engineering experience, with a track record of designing systems others build on top of

• Are comfortable designing APIs, data models, permissions, and backend abstractions

• Have strong judgment about when to keep systems simple, when to make them flexible, and when to make clear product decisions

• Enjoy turning messy real-world workflows into reliable, reusable systems

• Are customer-focused and able to translate product needs into thoughtful backend foundations

• Enjoy working in fast-paced environments with high ownership and autonomy

• Are proactive, detail-oriented, and take pride in building high-quality systems

The Process

We aim to hire with intention, respect your time, and offer feedback along the way.

1. Initial conversation (20 minutes) We’ll explore your motivations, share what we’re building, and answer your questions.

2. In-depth interview (45 minutes) We’ll go deeper into your craft and experience. No live coding. No prep work necessary.

3. Take-home project (2–4 hours) You’ll complete a short, well-scoped exercise that mirrors the kind of work you’d do here.

4. On-site visit (1–2 days) Join us in the office to review your take-home, grab lunch, and work on something real.

Compensation and Benefits

We believe great people build great companies –and we invest accordingly.

• Competitive salary + meaningful early-stage equity

• Full benefits: medical, dental, vision, 401(k), and commuter benefits

• Generous time off: many company holidays and coordinated team-wide breaks throughout the year to focus and recharge

• Office perks: lunch and dinner provided daily, in-office snacks, and health & wellness benefits

• Team culture: regular off-sites, tight feedback loops, and a bias toward action

Why Lapel, Why Now

1. A trillion-dollar problem hiding in plain sight. Companies spend over $1T a year on customer-facing teams and $150B on the tools meant to support them, yet every team still pieces context together across a dozen disconnected systems. We're rebuilding this from the foundation, and AI makes now the only moment it's possible.

2. The most interesting place to apply AI is where the work actually happens. Customer operations is one of the largest, most under-built surfaces in software. Every company runs on it, every team feels the pain, and the tools haven't been seriously reimagined in fifteen years. We think the next generation of category-defining B2B companies will be built here.

3. One platform, every customer-facing team. Sales, success, support, and ops all serve the same customer relationship, but each one buys a different tool to do it. Owning the foundation means the surface area grows with the company, from a single team to the entire revenue org to the whole business.

Lapel works in person in San Francisco, five days a week, at our office on Market Street. We hire people who'd be restless anywhere else.

Other notices

We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristics.

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.