About the Company

At Hiya, we’re revolutionizing voice communication. Our mission is to modernize voice with intelligence for security and productivity.

Since 2015, when we introduced the first mobile caller ID and spam-blocking apps, we’ve been at the forefront of voice intelligence innovation. Key milestones include:

• 2016: Partnered with Samsung and AT&T to launch Hiya Protect, the first network-based spam-blocking solution.
• 2019: Introduced Hiya Connect, a branded call SaaS platform that helps businesses reach more customers by phone.

Today, our Voice Intelligence Platform supports over 500 million users globally. By using adaptive AI and audio intelligence, it delivers smarter, safer, and more productive voice calls across networks, apps, and devices. Our network and solution partners include:

• British Telecom
• EE
• Virgin Media O2
• Ericsson
• Rogers
• Bell Canada
• MasMovil
• Telenor
• FICO
• Twilio

About the Role

Job Title: Senior Software Engineer SDE III (Full Stack)
Location: Barcelona, Spain
Employment Type: Full-time
Location Type: Hybrid
Department: Engineering

Overview

This position is part of the Audio Intelligence team at Hiya, focusing on building solutions for audio and speech leveraging AI and Deep Learning. Responsibilities include:

• Building and maintaining REST/gRPC backend services using Rust and Typescript.
• Building and maintaining frontend services using SvelteKit.
• Designing and maintaining relational databases using Postgres.
• Writing unit/integration/E2E/stress tests using Rust, Typescript, and Python.
• Writing and maintaining API documentation using OpenAPI and Docusaurus.
• Building CI pipelines using GitHub Actions.
• Containerizing services using Docker and deploying them to a K8s cluster.
• Debugging in staging and production environments using GCP tools.
• Integrating LLM-based features into the product.

What You’ll Need To Succeed

• Experience in backend engineering; ideally including low-level languages, streaming APIs, and media pipelines.
• A desire to own design and architecture end to end.
• A philosophy of iteration and continuous improvement.
• Understanding customer needs and providing solutions based on that.
• Excellent communication and self-organization skills, including working with remote teams.
• An interest in exploring AI use cases, including LLM prompt engineering or model API integration.
• 4+ years of relevant work experience.

Preferred Experience

You will have a fast start if you have experience with:

• Rust
• TypeScript
• Cloud environments (GCP)
• Kubernetes
• Postgres
• Using or integrating LLMs via APIs
• Prompt engineering, retrieval-augmented generation (RAG), or basic orchestration of model pipelines

Additional Information

• Start Date: Immediately
• Status: Full-time (40 hours per week)
• Travel Requirements: Yes, once a year travel to Seattle for the company off-site. Additional travel might be required to Spain and Budapest.
• Reports to: Director of Product
• Direct Reports: No

We are building a team with a variety of perspectives, identities, and professional experiences. We evaluate great candidates through a business lens and strongly believe that diversity and unique perspectives make our company stronger. Our team has won various awards over the last 4 years, and we are focused on helping each employee grow both personally and professionally.