Software Engineer, Full Stack (Early Career)

kustomer; United States; On-site; USD 90,000 - 115,000; Full time

Benefits offered by this job

Competitive salaries

Stock options

100% healthcare coverage (US)

401K

WiFi reimbursement

Mobile reimbursement

Generous vacation policy

Job summary

Kustomer is hiring a Full Stack Software Engineer to join our Engineering team. You'll work in a Pod of 3–5 engineers, shipping end-to-end features using Node.js, React, Golang, and AWS, with a focus on AI-powered capabilities.

You should bring a solid foundation in data structures, frontend and backend work, and comfort with AI tools. We emphasize ownership, craft, and collaboration, with competitive salaries, equity, and comprehensive US benefits.

Qualifications

• Bachelor's degree or equivalent hands-on experience in software.
• Strong software craft mindset with personal projects or open source contributions.
• Solid fundamentals in data structures and algorithms, and systems thinking.
• Comfort with both frontend and backend work or strong interest to learn the other.
• Experience with modern AI developer tools and APIs.
• Ability to read code, ask sharp questions, and contribute quickly.

Responsibilities

• Ship full-stack features as part of a Pod, using Node.js, React, Golang, MongoDB, and AWS.
• Build and maintain APIs and integrate with external services while ensuring data integrity.
• Develop front-end interfaces with emphasis on usability and accessibility.
• Contribute to AI-powered feature development as skills grow.
• Collaborate with product managers and senior engineers on requirements and UX.
• Write unit and integration tests from early in the project.
• Participate in code reviews and give/receive constructive feedback.
• Share production support responsibilities including on-call and bug triage.
• Explore new AI tools and full-stack techniques and bring learnings to the team.
• Ramp up on unfamiliar code paths using AI tooling and documentation.

Skills

Full stack development

Frontend & Backend

Node.js

React

Golang

MongoDB

Elasticsearch

AWS

SQL

Data structures & algorithms

Education

Bachelor's degree in Computer Science, Software Engineering, or related field

Equivalent hands-on experience

Tools

Cursor

Claude Code

OpenAI API

LangChain

Pinecone

Git

Job description

About Kustomer

Kustomer is the industry leading conversational CRM platform perfecting every customer experience. Built with intelligent tools such as AI and Automation, no code-configuration and a connected data platform that unifies data from multiple sources through a single timeline, Kustomer empowers businesses to operate with greater efficiency and deliver more personalized service to customers across any channel, making every interaction more meaningful and memorable. Today, Kustomer is the core platform for some of the leading customer service brands like Sweetgreen, Starz, Vuori, Resy and Cotopaxi.

Kustomer was founded in 2015 by serial entrepreneurs Brad Birnbaum and Jeremy Suriel and has raised over $230M in funding backed by leading VCs. Meta announced its intention to acquire Kustomer in 2020 and completed the transaction in 2022. Kustomer joined Meta’s Business Messaging Group to transform the way people and businesses communicate through modern messaging channels.

In 2023, Kustomer spun out from Meta as a standalone company backed by original partners, Battery, Redpoint and Boldstart Ventures, who have invested $60M. In 2025, Kustomer announced a $30M Series B led by Norwest, with continued support from Battery, Redpoint, and boldstart. This milestone reflects strong conviction in our vision and fuels our next chapter of growth: expanding our AI-native platform, accelerating product innovation, and scaling our exceptional team.

Our Krew is made up of passionate and collaborative people who really care about what they do and the people they help. We look for people who are passionate about enhancing the customer service experience for everyone involved, as it's the core of what we do. We're growing our business with no plans of slowing down. We actively seek individuals who want to learn and be challenged every day. We have also transitioned to a remote friendly company, with Krew members located throughout the U.S. and U.K. coming together for Kamp Kustomer each year.

About the Role

Kustomer is hiring a Full Stack Software Engineer to join our Engineering team. In this role, you'll work as part of a Pod: a 3–5 person team that picks up a high-priority initiative, ramps quickly, ships end-to-end, and moves on to the next one. You'll be a capable, adaptable engineer who can walk into any part of the codebase, understand it, and make it better. You'll ship new capabilities, improve performance, and contribute to the evolution of our architecture using technologies like Node.js, React, Golang, and AWS, collaborating closely with your squad leader and teammates across engineering, product, and design.

AI is a core part of how we build. You'll use AI tools daily to move faster and raise the bar on what you ship. You'll also help build AI-powered product capabilities that meaningfully improve the customer experience.

We're looking for engineers with strong technical judgment, a high bar for craft, and real curiosity about how systems, product, and AI intersect. You take initiative, thrive in ambiguous problem spaces, and own your work end to end, from design through production. Not because someone's tracking it, but because you genuinely care about what you're building. If you want your work to directly shape the product and the team around you, we'd love to hear from you.

What You'll Do:

• Ship full-stack features as part of a Pod, working alongside senior engineers using technologies like Node.js, React, Golang, MongoDB, ElasticSearch, and AWS

• Build and maintain APIs, and learn how to integrate with external services and databases the right way, with an eye toward data integrity and security

• Build front-end interfaces with growing attention to user experience, responsiveness, and accessibility

• Get exposure to AI-powered feature development and start contributing to it as your skills grow

• Work closely with product managers and more senior engineers to understand requirements, and start forming your own opinions on design and UX along the way

• Write unit and integration tests, and build the habit of testing thoroughly from the start of your career

• Participate in code reviews, both giving and receiving feedback, as a core part of how you grow

• Share in production support responsibilities on a rotating basis, including on-call and bug triage, so you learn what it really takes to run software in the real world

• Explore new AI tools and full-stack techniques, and bring what you learn back to the team

• Ramp up on unfamiliar parts of the codebase using AI tooling, documentation, and the people around you, and get comfortable asking questions early and often

Your qualifications:

• A Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent hands‑on experience through projects, internships, or bootcamps

• A genuine passion for software craft – this might show up as personal projects, open source contributions, hackathons, or just a track record of building things because you wanted to see if you could

• Solid fundamentals in data structures, algorithms, and how systems actually work under the hood – you don't need to be an expert yet, but you should be curious and eager to go deeper

• Comfort with both frontend and backend work, or a strong foundation in one with real interest in learning the other

• Some hands‑on experience with modern AI developer tools, such as Cursor or Claude Code, or a strong interest in building a real working practice around them

• The instinct to read the README, trace the code, ask sharp questions, and start contributing quickly, even in unfamiliar territory

• A mindset of ownership. You care about what you ship, not just about closing the ticket

• Your application will stand out if you have:

  • Personal projects or coursework involving AI or ML-powered features, even at a prototype level

  • Any exposure to third‑party AI APIs or frameworks (e.g., OpenAI, Anthropic, LangChain, or vector databases like Pinecone)

  • A GitHub profile that shows real curiosity: side projects, contributions to open source, or code you built just because you wanted to learn something

  • A demonstrated love of learning new tools and techniques, and a habit of sharing what you find with others

• Compensation Range: $90K - $115K + equity. The compensation range provided is an estimate. Actual compensation is determined based on job level, interview performance and alignment with the skills and applicable experience needed for this role.

HIPAA Compliance

All roles at Kustomer may involve handling sensitive personal data.

Benefits

Kustomeroffersanarrayofbenefitsincludingcompetitivesalaries and stockoptions. In the U.S. we offer 100% healthcare coverage, 401K, WiFi and Mobile reimbursement, and a generous vacation policy; in the UK we also offer pension, supplemental health insurance and other perks.

Diversity & Inclusion at Kustomer

Kustomer is committed to bringing together individuals from different backgrounds and perspectives. We strive to create an inclusive environment where everyone can thrive, feel a sense of belonging, and do great work together. We are proud to be an equal opportunity employer open to all qualified applicants regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or expression, Veteran status, or any other legally protected status.

As a job applicant, you have the right to know and understand the categories of personal information we collect about you, and the purposes for which we use such personal information.

Disclaimer: Kustomer only contacts candidates from company email addresses ending in kustomer.com and does not seek funds from candidates in any circumstances.