Principal Full Stack Engineer

Through proprietary software and AI, along with a focus on customer delight, Sleek makes the back-office easy for micro SMEs.We give Entrepreneurs time back to focus on what they love doing - growing their business and being with customers. With a surging number of Entrepreneurs globally, we are innovating in a highly lucrative space.We operate 3 business segments:

1. Corporate Secretary: Automating the company incorporation, secretarial, filing, Nominee Director, mailroom and immigration processes via custom online robots and SleekSign.  We are the market leaders in Singapore with ~5% market share of all new business incorporations
2. Accounting & Bookkeeping: Redefining what it means to do Accounting, Bookkeeping, Tax and Payroll thanks to our proprietary SleekBooks ledger, AI tools and exceptional customer service
3. FinTech payments: Overcoming a key challenge for Entrepreneurs by offering digital banking services to new businesses

Sleek launched in 2017 and now has around 15,000 customers across our offices in Singapore, Hong Kong, Australia and the UK.  We have around 500 staff with an intact startup mindset.

We have recently raised Series B financing off the back of >70% compound annual growth in Revenue over the last 5 years.  Sleek has been recognised by The Financial Times, The Straits Times, Forbes and LinkedIn as one of the fastest growing companies in Asia.

Backed by world-class investors, we are on track to be one of the few cash flow positive, tech-enabled unicorns based out of Singapore.

About the Role

Mission:

At Sleek, we are on a mission to streamline operations and elevate customer experience through intelligent automation and modern engineering. We are seeking a Principal Full Stack Engineer who will be a key individual contributor responsible for architecting, building, and scaling Sleek’s next generation of AI-powered capabilities.

As one of Sleek’s most senior individual contributors, you will partner closely with Product, Design, and Engineering Leads to define technical direction, architect robust AI first solutions, and deliver reliable, maintainable software. You will also help integrate AI thoughtfully and pragmatically into Sleek products and internal processes.

You will ensure:

• High-quality, scalable, secure engineering solutions
• Thoughtful and practical application of AI to automate and improve customer workflows
• High-quality systems capable of supporting advanced AI workloads at scale
• Strong engineering standards, testing, and maintainability
• Clear communication, alignment, and predictable delivery across teams
• Mentorship and technical leadership to elevate the broader engineering team

Outcomes:

Deliver High-Impact Product and Platform Improvements

• Lead end-to-end design and implementation of major product features and platform enhancements.
• Deliver solutions that improve performance, reduce operational issues, and enhance scalability.
• Take ownership of a complex technical domain and become the subject-matter expert for it

Strengthen Architecture and Technical Foundations

• Assess current architecture and propose a 6–12 month roadmap of improvements (performance, reliability, modularity).
• Introduce or refine engineering patterns and frameworks to speed up development while ensuring stability and quality.
• Drive adoption of best practices in API design, modular architecture, and system observability.

Improve Quality, Standards, and Engineering Best Practices

• Establish or refine engineering standards (testing, linting, CI/CD, error handling, code review quality).
• Champion the use of modern engineering tools, including AI-assisted development and testing tools, to improve team productivity.
• Ensure strong automated test coverage and modern DevOps practices across services.
• Identify recurring technical debt and support requests, and lead systemic fixes rather than one-off patches

Advance Performance, Security, and Operational Reliability

• Introduce meaningful monitoring, logging, alerting, and resilience patterns for critical services.
• Detect and fix bottlenecks in API performance, data modeling, database queries, or front-end rendering.
• Strengthen “secure-by-default” coding practices and guide teams on potential risks.

Mentor and Elevate the Engineering Team

• Provide hands-on coaching to mid and senior engineers; uplift the skillset of the entire engineering org.
• Lead architecture reviews, design discussions, and tech deep dives with clarity and influence.
• Act as a force multiplier through clear documentation, reusable components, patterns, and frameworks.

Strengthen Cross-Functional Collaboration

• Work closely with PM, QA, and Design to refine requirements and ensure stories meet DOR/DOD.
• Communicate proactively about risks, trade-offs, estimates, and delivery expectations.
• Serve as a trusted partner to business and product stakeholders for complex or ambiguous technical problems