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About Kustomer

Kustomer is the AI-native customer experience platform that turns every interaction into a lasting relationship and a measurable business outcome. By unifying customer data, conversations and AI-native workflows into a single connected timeline, Kustomer helps teams cultivate customers, not tickets, resolving issues faster and delivering more personalized service across every channel. Today, Kustomer is the core platform for leading customer service brands like Sweetgreen, Starz, Vuori, Goldbelly and Cotopaxi.

Founded in 2015 by serial entrepreneurs Brad Birnbaum and Jeremy Suriel, Kustomer raised nearly $200M in funding culminating in a Series E before being acquired by Meta in a deal that closed in 2022. In 2023, Kustomer's founders and original investors, Battery, Redpoint, and Boldstart Ventures, spun the company back out with a $60M investment as an independent, privately held business ready to focus more deeply on AI. In 2025, Norwest led our Series B, bringing our total funding to $90M. This momentum allowed Kustomer to double down on AI-native innovation and build a sharper roadmap for the future of customer experience. Our Krew is a remote-friendly team spread across the U.S. with hubs in NYC and London. We gather in person each year at our annual Kustomer Kick-Off event and always look for Krew members who are curious, collaborative, and ready to shape the future of Customer Experience.

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 pod 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 end-to-end as a member of a pod, owning scope from problem definition through production, using technologies like Node.js, React, Golang, MongoDB, ElasticSearch, and AWS
Develop APIs and integrate with external services and databases, ensuring data integrity and security
Build front-end interfaces with a focus on user experience, responsiveness, and accessibility
Design and build AI-powered features that improve the user experience and platform efficiency
Partner with PMs, engineers, and your Pod Lead to shape requirements, design, UX, and scope tradeoffs, communicating progress proactively along the way
Optimize application performance through caching, efficient algorithms, and database indexing
Write thorough unit and integration tests to ensure quality and reliability
Conduct code reviews, provide constructive feedback, and mentor junior engineers to uphold a high quality bar
Share production support responsibility on a rotating basis, including on-call and bug triage, distributed equitably across the team
Stay current with emerging AI tools, full-stack technologies, and industry trends — and actively propose and champion those that improve team velocity, quality, and development practices
Ramp quickly on unfamiliar parts of the codebase aided by AI tooling, consistent code hygiene, and a deep engineering foundation

Your qualifications:

7+ years of progressive software development experience and a Bachelor's degree in Computer Science, Software Engineering, or a related field
You're comfortable working across frontend and backend. You may have a stronger side, and that's fine. What matters is that you can follow the work wherever it goes and aren't blocked by an unfamiliar layer.
You understand how systems work at depth and have experience with cloud platforms like AWS or similar. Data structures, algorithms, concurrency, distributed systems, API design, database internals; these are tools, not trivia.
You don't need to be the domain expert before contributing. You read READMEs, trace execution, ask sharp questions, and start adding value fast.
You own the outcome, not just the ticket. You raise risks early, communicate progress proactively, and care about what ships, not just what you committed.
You’re able to diagnose and debug complex issues, optimize application performance, and identify areas for improvement.
You have hands-on experience with modern AI developer tools, such as Cursor or Claude Code, and have built a real working practice around using them as a force multiplier for code comprehension, test scaffolding, documentation, debugging, and ramp.

Your application will stand out if you have:
- Familiarity with integrating AI or ML-powered capabilities into web applications, even at a prototype or feature level
- Exposure to integrating third-party AI APIs or frameworks (e.g., OpenAI, Anthropic, LangChain, or vector databases like Pinecone)
- Interest in exploring how AI can enhance developer workflows and improve product functionality
- Github activity showing thoughtful, relevant contributions

HIPAA Compliance

All roles at Kustomer may involve handling sensitive personal data.

Benefits

Kustomer offers an array of benefits including competitive salaries and stock options. 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.

Candidate Privacy Notice

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.

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About Kustomer

About the Role

As a Sales Development Representative (SDR), you will support the Kustomer sales effort in multiple functions while developing your skills for a full-cycle sales role. Your daily responsibilities will include the prospecting and sourcing of potential decision makers, outbound lead generation and leading qualification meetings. You will create an excellent first impression for prospective customers over multiple channels, including email, phone, and social. You will work closely with the sales and marketing teams driving Kustomer’s message to the market.

We are focused on hiring in the New York, NY metropolitan areas as the team comes into our Manhattan office 1x a week on Wednesdays. You must already be located in the tri-state area (CT, NY, NJ).

You'll be responsible for:

Engaging with potential prospects over email and phone to qualify and set appointments for the account executives
Identifying target customers for Kustomer through email, phone, and social channels
Maintaining active engagement with leads through informed, creative follow-ups
Researching and developing prospective accounts
Working closely with account executives to identify qualified accounts and define strategies for outreach
Partnering with marketing to deliver proper messaging and identify the best target market segments
Achieving quarterly quotas for developed leads and closed Sales
May involve handling sensitive personal data

Your qualifications:

6 months of inbound/outbound sales experience (may include internships), previous work with sales/startups preferred
You are able to quickly engage potential customers over email, phone, and in person
You’re clear, concise, and accurate in your communications, both written and verbally
You’re excited by AI and quickly mapping them to Sales processes
You possess grit and don’t shy away from rejection
You’re hungry to progress your career
You know how to effectively manage your time to complete objectives
You have experience being accountable to metrics, often exceeding them
You thrive in a high-energy team environment

Want to learn more about our Sales culture? Check out our CRO's Builtin Article: No one is a Cog in the Machine.

HIPAA Compliance

All roles at Kustomer may involve handling sensitive personal data.

Benefits

Diversity & Inclusion at Kustomer

Kustomer is committed to bringing together individuals from different backgrounds and perspectives.

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.

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Role	Company	Location	Season	Posted
Software Engineer, Full Stack (Senior, Staff+)	Kustomer	US - New York, NY, United StatesHybrid	—	27 days ago
Sales Development Representative	Kustomer	US - New York, NY, United StatesHybrid	—	2 months ago