Engineering - We're Hiring - New
UI/UX Designer
Remote - Full
At Callin.io, we're building the voice AI infrastructure that powers the next generation of human-machine conversations. Our platform handles millions of conversation minutes, enabling businesses to deploy intelligent voice agents that feel genuinely natural. We're a small, senior team moving fast on hard problems — and we're looking for engineers who thrive in that environment.
As UI/UX Designer at Callin.io, you'll take on one of the hardest design challenges in tech: making complex AI voice systems feel simple, intuitive, and human. You'll own the end-to-end design process — from early research and concept sketches to polished, production-ready interfaces — and you'll be the voice in the room that keeps the user experience at the center of every product decision.
This isn't a role where design is called in at the end to make things pretty. You'll be involved from the earliest stages, shaping how features are conceived and not just how they look. If you believe that great design is what makes powerful technology accessible to the people who need it most, and you have the portfolio to back that up, we want to talk.
Design intuitive interfaces for callin.io's dashboards, configuration tools, and customer-facing applications — translating complex AI functionality into experiences that feel effortless
Lead the full design process: user research, journey mapping, wireframing, prototyping, and high-fidelity UI delivery
Build and maintain a cohesive design system in Figma that scales across the product and keeps the team moving fast
Work closely with product and engineering to ensure designs are feasible, well-implemented, and iterated on after launch
Conduct usability testing and synthesize findings into actionable improvements
Advocate for the user in roadmap discussions, bringing research and insight to product prioritization conversations
3+ years of UI/UX design experience, with a portfolio that demonstrates strong B2B SaaS work — we'll want to see how you think, not just what you made
Deep proficiency in Figma, including component libraries, auto layout, and collaborative design workflows
Experience building or contributing to design systems — you understand how to create consistency at scale without killing flexibility
A strong visual sensibility combined with rigorous UX thinking — you care as much about why something works as how it looks
Ability to communicate design decisions clearly to engineers, product managers, and stakeholders at all levels
Comfort working autonomously in a fast-moving, async environment where you'll often need to define the brief as much as respond to it
Experience designing voice interfaces or conversational UI — understanding the unique challenges of designing alongside audio interactions
Accessibility expertise — WCAG familiarity, inclusive design practices, and a genuine commitment to building for everyone
Background in developer tools, analytics platforms, or other technically complex product categories
Familiarity with front-end fundamentals — enough to collaborate fluently with engineers and understand what's easy or hard to implement
Design that shapes the product. At callin.io, design isn't a service function — it's a core part of how we build. You'll have a seat at the table from day one, with real influence over what we make and how it works.
A genuinely hard problem. Designing for voice AI means navigating complexity that most design teams never face — real-time systems, non-visual interactions, and users who range from technical developers to non-technical business buyers. The design challenges here are unlike anything in a standard SaaS product.
Async-first, fully remote. Work from wherever you do your best thinking. We care about outcomes, not office hours.
Room to define the craft. We're early enough that the design culture, processes, and standards at callin.io are still being shaped. You'll have a significant hand in building them.
Competitive compensation. Salary benchmarked to senior design roles at top-tier tech companies, regardless of your location.
Apply
Our hiring process is designed to be respectful of your time while giving us confidence you're the right fit.
01
Application Review: 15-30 minutes Submit your application with resume/portfolio. We review every application personally and respond within 5 business days.
02
Initial Screen: 30 minutes Quick video call with our recruiting team to discuss your background, the role, and answer initial questions.
03
Technical/Skills Assessment: Varies by role For engineering roles: coding challenge or take-home project. For other roles: case study, portfolio review, or role-specific exercise.
04
Team Interviews: 2-3 hours total Meet potential teammates and leadership. We typically schedule 2-3 conversations covering technical skills, culture fit, and role-specific deep dives.
05
Final Decision: 2-3 days We move quickly. You'll hear our decision within 2-3 days after final interviews. If it's a yes, we'll extend an offer immediately.
Total Timeline: 2-3 weeks from application to offer