Senior 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:

• 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 Asia Pacific.

About the Role

Mission:

As the Fullstack Engineer, you will be at the forefront of transforming our technology landscape through comprehensive, end-to-end AI solutions. Your mission is to architect, develop, and deploy scalable systems that leverage advanced Artificial Intelligence and automation capabilities to drive operational efficiency, product innovation, and user satisfaction. You will work closely with cross-functional teams—ranging from data scientists and product managers to UX/UI designers and DevOps professionals—to ensure seamless integration of AI-powered features where they deliver the greatest value, while maintaining a robust software architecture and intuitive user experience. Your role will be instrumental in ensuring our next-generation platform not only meets client and internal needs but also sets new standards for innovation, reliability, and excellence in the AI-driven software industry.

Outcomes:

Deliver High-Quality Code: Consistently submit well-documented, maintainable, and robust code through Pull Requests (PRs) that include comprehensive tests (unit, integration) and adhere to team coding standards and best practices. Aim for high test coverage (e.g., >80%) on new code.

Apply Strong Fundamentals: Design and implement features demonstrating strong understanding and application of software architecture principles (e.g., SOLID, clean architecture), efficient database design (schema, indexing, query optimization), and API best practices (RESTful design, security).

Leverage AI Tools Effectively: Integrate AI coding assistants and tools into your daily workflow to demonstrably improve development speed (e.g., reducing boilerplate, accelerating test writing, assisting debugging) without compromising code quality, maintainability, or introducing unnecessary complexity. Be prepared to share effective prompts and techniques.

Contribute to System Stability: Keep production rollback rate related to your contributions under 2% by enforcing comprehensive testing, leveraging CI/CD pipelines effectively, and adhering to established DevOps best practices.

Engage in Collaborative Development: Actively participate in code reviews, providing timely, constructive feedback based on engineering principles and best practices. Respond proactively to feedback on your own PRs, contributing positively to team velocity and knowledge sharing.

Requirements:
Professional Background: 5+ years as a Full-Stack Engineer or similar role, building and shipping scalable applications in production environments. Experience integrating AI into products is a plus, but not essential.

Front-End & Back-End: Fluent in VueJS or React, and NodeJS with TypeScript (bonus if has experience with NestJS). Comfortable designing modular, reusable, and resilient services - particularly within a microservices or service-oriented ecosystem.

Databases & Architecture: Experience with MongoDB or Supabase, ESR/RPC, and well-structured software design. Strong grasp of Clean/Hexagonal architecture, SOLID principles, ACID behaviors, and idempotent system design

AI Skills: : Experience using AI for development. Bonus if experience integrating AI features into customer-facing applications and familiarity with AI tools or frameworks (e.g., LangChain, LlamaIndex). Enthusiasm for learning more in this space is valuable.

Quality Advocate: Committed to high engineering standards - testing, documentation, code quality, security practices, and maintaining reliable services across the stack.

Interpersonal Skills: Strong communicator who thrives in cross-functional teams. Able to collaborate with product, UX, data, and engineering partners to deliver well-rounded solutions.

Cloud & DevOps Expertise: Working knowledge of AWS or GCP, with good judgment around when to use serverless, PaaS, or containerized deployments. Experience with Kubernetes is a plus. General familiarity with CI/CD best practices.

Collaboration & Independence: Comfortable owning features end-to-end, driving projects from concept through delivery, and supporting others on the team.

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:

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.

Interview Process:

The successful candidate will participate in the below interview stages.

A ~15 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

Please be aware that Sleek is a regulated entity and as such is required to perform different levels of background checks on staff depending on their role.

This may include using external vendors to verify the below:

Your education

Any criminal history

Any political exposure

Any bankruptcy or adverse credit history

We will ask for your consent before conducting these checks. Depending on your role at Sleek, an adverse result on one of these checks may prohibit you from passing probation.

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