Senior Full Stack Engineer (Core User Experience)

Kalepa; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Kalepa is seeking an experienced frontend engineer to refine core UX, ensuring consistency and a premium user experience across the product. You will work with a global team to implement performance improvements and collaborate with backend, data, ML, and DevOps engineers to scale solutions.

The role emphasizes ownership, quality, and iterative improvement, with a strong focus on delivering polished, responsive interfaces using modern frontend tech.

Qualifications

• 5+ years of software engineering experience.
• Strong fundamentals in system design, debugging, and performance optimization.
• Proficient in JavaScript/TypeScript and modern frontend frameworks (React).
• Experience with relational databases (PostgreSQL) and cloud environments.

Responsibilities

• Refine core UX to deliver a premium user experience.
• Ensure consistency across the product and cohesive look-and-feel.
• Improve performance and responsiveness for end users.
• Collaborate with a global team to build scalable backend solutions.

Skills

JavaScript/TS

Python

System design

Debugging

Frontend performance

Tools

React

PostgreSQL

AWS (Lambda, EC2)

Job description

• 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
• 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

We are looking for smart engineers who love to code, seek challenging problems and appreciate recognition for excellent workThis role is ideal for someone who enjoys iterative improvement, cares deeply about quality, and wants to shape the everyday experience of our usersEmbody hustle and grit, you’re excellent at your craft and relentless in pursuing itTake full ownership of your work and drive projects to completion with minimal oversightHave 5+ years of software engineering experience, ideally with a track record of improving and polishing functionalities to bring premium user experienceHave strong fundamentals in system design, debugging, and problem-solvingAre comfortable with relational databases, ideally PostgreSQLKnow Javascript, Typescript, or Python, though we’re open to strong candidates from other OO backgroundsBonus: experience with LLMs/generative AI, distributed systemsCommunicate proactively, surfacing blockers, asking the right questions, keeping stakeholders in the loopHave experience with serverless technologies (Lambda, EC2), asynchronous workflows, and cloud environmentsYou have experience in a modern FE framework, preferably ReactThrive on experimentation: you’re comfortable testing ideas, measuring results, and iterating quickly on problems no one has solved before