Lead Engineer - AI-Native Email App
Bjak · Remote · Tokyo, Japan ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Lead Engineer role
- Hybrid (3 days office)
- AI-native email app
- English required
- Fast hiring process
Doit is reinventing personal finance through AI-driven tools that make spending, saving, and investing accessible. As a Lead Engineer, you will take technical ownership of complex products, balancing architecture decisions with hands-on coding. You will guide the team in building scalable, reliable systems while maintaining high code quality standards.
What you'll do
- Lead technical design and execution of major engineering initiatives
- Design scalable systems across backend, frontend, APIs, and infrastructure
- Remain hands-on with coding, prototyping, and debugging
- Make architecture decisions balancing speed, scalability, and reliability
- Mentor engineers and strengthen technical capability across the team
- Review technical designs and provide actionable feedback
- Monitor production systems and resolve root causes of incidents
- Improve engineering tooling and automation to increase velocity
What you'll need
- Strong software engineering background with production system experience
- Deep expertise in backend, frontend, distributed systems, or cloud infrastructure
- Proven experience leading major engineering projects or teams
- Strong system design skills for complex or high-scale systems
- Willingness to remain hands-on with coding and code reviews
- Ability to explain technical decisions clearly to cross-functional teams
- Strong product sense connecting tech decisions to business outcomes
- Comfortable working with ambiguity and taking full ownership
How you'll work
- Hybrid work model
- Office attendance required at least 3 days per week
- Remote flexibility for remaining days
- Must be based in or able to work from the advertised location
- English is the main working language
Hiring process
- Online assessment or practical task
- Technical interview
- CEO or final round interview
- Process aims to complete within one week for strong candidates