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Principal Software Engineer, AI Email App

bjakcareerUnited StatesActAI Engineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Senior
Posted
28 Sept 2026
Status
Open · checked 7d ago

About this role

bjakcareer is hiring a Principal Software Engineer for an AI Email App in the United States to lead engineering strategy across backend, mobile, and desktop platforms. This hands-on leadership position suits an experienced technical professional focused on building reliable, production-grade applications that integrate artificial intelligence into everyday software.

Role Overview

The organization focuses on creating proactive applications for billions of users by embedding intelligence into traditional tools like email, notes, and calendars with minimal user prompting. The Principal Software Engineer will take charge of the engineering layer, shaping system architecture while remaining closely connected to writing code. Responsibilities include ensuring system performance, scalability, and reliability for long-running workflows and persistent contexts.

Key Responsibilities

Direct application engineering strategy and execution across backend, desktop, and mobile environments.
Architect dependable systems for artificial intelligence workflows covering state management, orchestration, fallbacks, retries, and tool use.
Develop APIs and abstractions linking artificial intelligence models to practical product experiences.
Mentor a compact team of senior engineers through code reviews, design evaluations, and direct participation.
Balance architectural trade-offs involving latency, security, reliability, cost, and user experience.
Implement production fundamentals including testing, monitoring, and observability.
Collaborate with machine learning leadership to translate model capabilities into shippable features.

Requirements

Extensive background in leading product or application engineering for intricate systems.
Demonstrated practical experience constructing and launching production backend systems.
Prior involvement in developing artificial intelligence products that integrate modern machine learning or large language models.
High technical judgment capability to make decisions under conditions of incomplete information.
Cross-platform proficiency spanning client and backend environments, featuring deep expertise in at least one.
Strong focus on execution, ownership, and adherence to high code quality standards.

Skills and Tools

Backend Services
APIs
Mobile Platforms
Desktop Platforms
Machine Learning and LLM Integrations

About the Company

bjakcareer operates as a compact, high-talent-density team emphasizing independent execution and strong engineering fundamentals over excessive process. The group prioritizes transparency and efficiency, maintaining a streamlined interview process consisting of three to four virtual or onsite meetings.

How to Apply

Interested candidates should visit the official company careers page to submit an application for this position.

Skills and tech stack

APIsBackend ServicesLLMsMachine LearningLLM

Questions candidates ask

What is the primary focus of the Principal Software Engineer role at bjakcareer?

The role owns the engineering layer that translates artificial intelligence capabilities into reliable products, focusing on architecture across backend services, APIs, and client applications while leading a small senior engineering team.

Where is the position located?

The role is located in the United States.

What experience is required for this position?

Candidates need significant experience leading application or product engineering for complex systems, a strong background in building production backend systems, and experience building artificial intelligence products utilizing modern machine learning or LLM capabilities.

How many interview rounds are part of the hiring process?

The interview process consists of three, but no more than four, interviews conducted via virtual meetings and/or onsite.

Ready to apply?

The application is on the official bjakcareer careers page.

Apply on company site