Principal Full Stack Software EngineerSleek • Australia
Principal Full Stack Software Engineer
Sleek • Australia
8 days ago
Job descriptionHigh-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 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 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 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 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 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 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 8 plus years of full stack engineering experience 8 plus years leading delivery of complex systems Experience designing scalable architectures, APIs, and services with strong testing and observability Strong proficiency with Javascript and Typescript Strong proficiency in modern backend technologies (Node.js, bonus to have experience with NestJS) and frontend frameworks (React or Vue) Strong proficiency with both relational databases (Postgres or MySQL) and no-SQL databases (MongoDB), along with ORMs like TypeORM and Mongoose Proven track record delivering production-grade applications in SaaS, B2B, FinTech, or similar environments Hands-on experience building and integrating AI-powered features, such as LLM-based automation, classification, document processing, or workflow enhancement Familiarity with AI development and evaluation tools (e.g., vector search, embeddings, prompt frameworks, or AI-assisted development tools) Solid understanding of cloud platforms (AWS preferred), CI / CD pipelines, and DevOps practices Excellent communication skills and experience partnering with Product, Design, and QA A history of mentoring engineers and raising engineering quality across teams Nice to have : Experience in Fintech (accounting, bookkeeping, etc) Ownership : This shows reliability and helps build trust within the team. We move fast and need to know that everyone will see things through to completion and proactively help to get things back on track when challenges arise. Accountability is really important to us. Humility : There is so much we don\'t know. Humility allows for open-mindedness to feedback and a willingness to learn from others. It paves the way for collaboration and creates a positive work environment. It is a key ingredient of self awareness and emotional intelligence. Structured Thinking : Our business is complex with many layers (many services, many countries, many cultures). Regardless of whether you\'re more analytical or creative in nature, being able to show sound judgement is important to us. It ensures solutions are pragmatic and balance the needs of the organisation, team and customers. Attention to detail : You\'ll be managing multiple, complex workstreams from numerous stakeholders. It will be important for you to keep track of everything and notice when information is missing or inconsistent. Excellent listener and clear communicator : We have a variety of nationalities and for many people, English isn\'t their first language. For you to excel, you\'ll need to be present in your calls and make sure you properly receive and thoughtfully send messages to others in the business. Analytical Mindset : You have a keen eye for detail and a methodical approach to dissecting problems. You excel at analysing complex systems and processes to identify weaknesses and inefficiencies, and your ability to evaluate multiple scenarios enables you to devise the best testing strategies. You apply data-driven decisions to enhance testing coverage and performance metrics, ensuring the highest standards of software quality. Collaboration-Driven : You thrive in a cross-functional team environment, working closely with developers, product managers, and operations teams to ensure alignment on requirements and testing goals. You communicate effectively, advocate for quality throughout the development process, and proactively address potential issues before they arise, fostering a culture of shared responsibility for delivering exceptional software. Data driven : We are a data rich business with : 15,000 small customers. Each decision we make can impact many more people than we realise - so it\'s critical that we use sound data to support our strategies and review the success of our initiatives. Can have tough conversations in a positive way : It\'s not a matter of if, but when difficult interpersonal situations arise. Disagreement, conflict and disappointment are a given in a fast moving business where people care about their work. People that proactively have tough conversations with kindness build empathy, trust and great working relationships. A 30 minute chat with a member of the HR Team Take Home Assessment : A 2-3 hour take-home assessment that covers both backend and frontend, challenging the candidate\'s ability to build projects from scratch and adhere to good coding standards. Technical interview : A 90 minute chat with the Hiring Manager and / or another member of the team to validate the technical aptitude of the candidate. Career Deep Dive / Behavioral fit interview : A 30-45 minute chat with the CTO to validate our desired experience. Offer + reference calls : We\'ll make a non-binding offer verbally or over email, followed by a couple of short phone or video calls with references that you provide to us. Requirement for background screening : Sleek is a regulated entity and performs different levels of background checks on staff depending on role. This may include using external vendors to verify your education, any criminal history, political exposure, or bankruptcy / adverse credit history. We will ask for your consent before conducting these checks. Depending on your role, an adverse result may prohibit you from passing probation. By submitting a job application, you confirm that you have read and agree to our Data Privacy Statement for Candidates, found at sleek.com. Humility and kindness : We hire for humility and kindness and are committed to a diverse and inclusive environment. Flexibility : You will be required to work from the office at least 2-3 days per week if based in Singapore or Australia. Other locations : fully remote, with five days work from home. Flexible start times are supported. Financial benefits : Competitive salaries, generous paid time off, health and fitness expenditure options, employee share ownership plan eligibility, and potential participation in a future stock listing. Personal growth : Responsibilities, autonomy, internal and external training, and a focus on AI in Sleek; opportunity to develop professionally. Sleek is a certified B Corp with a growing sustainability footprint, including reforestation efforts and carbon neutrality goals for 2030.
About Sleek
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 :
- 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
- 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
- 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.
Role Overview
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 :
Outcomes :
Deliver High-Impact Product and Platform Improvements
Strengthen Architecture and Technical Foundations
Improve Quality, Standards, and Engineering Best Practices
Advance Performance, Security, and Operational Reliability
Mentor and Elevate the Engineering Team
Strengthen Cross-Functional Collaboration
Requirements
Behavioural fit is also important at Sleek, and we will be looking for candidates that have a proven track record of embodying the below attributes in their recent roles :
Interview Process :
Background checks and data privacy
Benefits
Senior Full Stack Engineer (Shopify, React, Node.JS, Typescript) | Melbourne / Sydney, Australia
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Principal Full Stack Software Engineer • Australia
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