Senior Full Stack Engineer (Core User Experience)

Kalepa; New York (NY); On-site; USD 140,000 - 190,000; Full time

Job summary

Kalepa in New York is seeking a software engineer who loves to code and thrives on polishing product experiences for premium UX. You will refine existing functionality, ensure consistency across the product, and push performance improvements that matter to users.

You will collaborate with a global team of full-stack, data, ML, and DevOps engineers to build scalable back-end solutions while iterating quickly on ideas, testing results, and surfacing blockers.

Qualifications

• We are looking for smart engineers who love to code, seek challenging problems and appreciate recognition for excellent work.
• As part of the Core UX team, you will focus on refining existing product functionality to deliver an exceptional user experience.
• Your work will center on ensuring consistency across the product, maintaining a cohesive look and feel, and implementing performance improvements that directly impact end users.
• Thrive on experimentation: you’re comfortable testing ideas, measuring results, and iterating quickly on problems no one has solved before
• Bonus: experience with LLMs/generative AI, distributed systems
• Know Javascript, Typescript, or Python, though we’re open to strong candidates from other OO backgrounds
• Have 5+ years of software engineering experience, ideally with a track record of improving and polishing functionalities to bring premium user experience
• Take full ownership of your work and drive projects to completion with minimal oversight
• Have experience with serverless technologies (Lambda, EC2), asynchronous workflows, and cloud environments
• You have experience in a modern FE framework, preferably React
• Embody hustle and grit, you’re excellent at your craft and relentless in pursuing it
• Have strong fundamentals in system design, debugging, and problem-solving

Responsibilities

• Collaborate with a global team of full-stack, data, ML, and DevOps engineers to build scalable backend solutions.
• Take full ownership of your work and drive projects to completion with minimal oversight.
• Refine product functionality to deliver a premium user experience and cohesive look-and-feel.
• Focus on layout, interactions, responsiveness, and visual polish to elevate the product.

Skills

JavaScript/TypeScript

Python

5+ years exp

React

System design

Performance tuning

Tools

Lambda

EC2

PostgreSQL

Job description

• We are looking for smart engineers who love to code, seek challenging problems and appreciate recognition for excellent work


• As part of the Core UX team, you will focus on refining existing product functionality to deliver an exceptional user experience


• Your work will center on ensuring consistency across the product, maintaining a cohesive look and feel, and implementing performance improvements that directly impact end users


• You’ll be paying close attention to the layout, interactions, responsiveness, and visual polish, that collectively give the product a premium, well-crafted feel


• This role is ideal for someone who enjoys iterative improvement, cares deeply about quality, and wants to shape the everyday experience of our users


• You’ll collaborate with a global team of full-stack, data, ML, and DevOps engineers to build scalable backend solutions as we continue to grow


• We’re a small team where individual contributions have an outsized impact on both our technology and our business

Thrive on experimentation: you’re comfortable testing ideas, measuring results, and iterating quickly on problems no one has solved beforeBonus: experience with LLMs/generative AI, distributed systemsCommunicate proactively, surfacing blockers, asking the right questions, keeping stakeholders in the loopKnow Javascript, Typescript, or Python, though we’re open to strong candidates from other OO backgroundsHave 5+ years of software engineering experience, ideally with a track record of improving and polishing functionalities to bring premium user experienceTake full ownership of your work and drive projects to completion with minimal oversightHave experience with serverless technologies (Lambda, EC2), asynchronous workflows, and cloud environmentsYou have experience in a modern FE framework, preferably ReactAre comfortable with relational databases, ideally PostgreSQLEmbody hustle and grit, you’re excellent at your craft and relentless in pursuing itHave strong fundamentals in system design, debugging, and problem-solving