← All jobs
Bjak

Android Software Engineer

Spain
Salary
Not stated
Level
Mid
Work type
Remote · Spain only
Visa
Not stated

Open. First seen 2 October 2026.

Apply on jobs.ashbyhq.com →

The team: ActAI NEW TEAM

This team is new: its 232 open roles were posted Oct 12–16, and Bjak had none in it before. You would be one of its first people.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

LLM (121 of 232), Python (121 of 232), PyTorch (121 of 232), Machine Learning (116 of 232), Vector Databases (75 of 232), NoSQL (55 of 232), SQL (55 of 232)

OTHER ROLES ON THIS TEAM

From the team and dates on Bjak's own job board.

About the role

About ActAI

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.

Our first application is an agent-first mobile communication app. We believe building applications that users use daily for communication, coordination and collaboration needs will help integrate AI into their lives. The net effect is to eliminate misinformation, achieve low coordination costs, enable high quality tasks and collaboration at scale with minimal or little prompting.

Role

As an Android Software Engineer, you own the Android client experience, how AI feels, behaves, and performs on mobile devices. This is not a thin client role. You will build a production Android application where AI interactions are core to the product, and performance, reliability, and clarity matter.

Focus

  • Build and maintain production Android apps using Kotlin.
  • Integrate AI-powered features (chat, vision, voice, recommendations) via backend APIs.
  • Design UX patterns for AI interactions, including streaming responses, retries, and partial results.
  • Optimize performance, memory usage, and responsiveness for AI-heavy flows.
  • Implement analytics, logging, and feedback capture to support AI evaluation and iteration.
  • Collaborate closely with backend and ML engineers on API contracts and system behavior.
  • Ensure app stability, security, and scalability in production environments.

Ideal Experiences

  • 3+ years of Android development experience using Kotlin.
  • Hands-on experience integrating AI features (e.g. LLM, vision, speech APIs).
  • Strong understanding of asynchronous programming (Coroutines, Flow).
  • Familiarity with REST or gRPC APIs and structured data formats.
  • Strong debugging and performance profiling skills.
  • Comfort building in environments with latency, partial failure, and non-deterministic behavior.
  • Experience with MLKit or light on-device inference.
  • Published production apps on the Google Play Store.

Outcomes

  • Stable, smooth, and reliable real-world use android applications.
  • Performance is optimized: responsive, low-latency, and efficient on memory and CPU.
  • Production issues are detected early, monitored effectively, and resolved with clear root-cause analysis.

Tech Stack

  • Kotlin / Java
  • SQL / noSQL
  • TensorFlow Lite (on-device inference)

How We Work

The best products today in the world were built by small, world class teams. We are a high talent density and hands-on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product

Interview process

If there appears to be a fit, we'll reach to schedule 3, but no more than 4 interviews.

Applications are evaluated by our technical team members. Interviews will be conducted via virtual meetings and/or onsite.

We value transparency and efficiency, so expect a prompt decision. If you've demonstrated the exceptional skills and mindset we're looking for, we'll extend an offer to join us. This isn't just a job offer; it's an invitation to be part of a team that's bringing AI to have practical benefits to billions globally.

Other openings for this role

2 open postings for this role in Spain, first posted 2 October 2026. The company is likely hiring for more than one position. None has been taken down and posted again.

Similar jobs

Is this your posting and you want it taken down? Email info@careerholo.com.