We are looking for a Senior Full Stack Engineer to join our team, working on a hybrid basis from our Tokyo office and from home. In this role you will be a key member of our Engineering function, contributing directly to our goals and working closely with talented colleagues across the business.
This is a hands-on role with real ownership and impact. You will apply your skills in React, Node.js and MongoDB to solve interesting problems, ship work you can be proud of and help us raise the bar for what we do. You will collaborate with cross-functional teams, share your ideas openly and have the support you need to do your best work and grow along the way.
You will bring around 7 to 11 years of relevant experience and strong, practical knowledge of React, Node.js and MongoDB. Just as important are clear communication, sound judgement, attention to detail and the ability to collaborate effectively with people across different teams and backgrounds. Experience leading projects, mentoring others and influencing decisions will set you up for success in this role.
Within your first few months, you will get up to speed with our products, processes and people, build strong working relationships across the team, and begin taking ownership of your own work. Over time, you will have the opportunity to deepen your expertise, take on broader scope and grow your career with us as the company continues to scale.
In return, we offer a supportive, inclusive and collaborative environment, competitive pay, meaningful benefits and the chance to do work that genuinely matters. We care about our people, invest in their growth and want everyone here to be able to do the best work of their careers.
If this sounds like you, we would love to hear from you. Onyx Industries is an equal-opportunity employer: we welcome applicants of all backgrounds and are committed to building a diverse team and an inclusive workplace where everyone can thrive. Apply today and tell us why you would be a great fit.
Responsibilities
As a Senior Full Stack Engineer at Onyx Industries, you will play a central role within our Engineering function and take ownership of a broad and varied set of responsibilities. Working alongside a collaborative, motivated team, your day-to-day duties will include, but are not limited to, the following:- Mentor, coach and support more junior team members, helping them grow and do their best work.
- Represent your function in cross-functional and leadership discussions.
- Build alignment across stakeholders and resolve competing priorities constructively.
- Review the work of your peers, provide constructive feedback and help raise the overall quality bar of the codebase.
- Investigate, debug and resolve production issues, performing root-cause analysis and putting preventive measures in place.
- Contribute to CI/CD pipelines, automated testing and deployment processes to enable safe and frequent releases.
- Write clean, maintainable and well-documented code, and contribute to shared libraries, tooling and engineering best practices.
- Design, build and maintain high-quality, well-tested and scalable solutions that meet both functional and non-functional requirements.
- Translate product and business requirements into clear technical designs, breaking large problems into well-scoped, deliverable pieces of work.
- Take part in on-call rotations where required and respond promptly and calmly to incidents and outages.
- Continuously monitor system performance, identify bottlenecks and drive improvements in reliability, latency and cost.
- Collaborate closely with product managers, designers and QA to ship reliable features on agreed timelines.
- Document technical decisions, write runbooks and share knowledge so the wider team can operate and extend your work.
- Participate actively in design discussions, architecture reviews and technical planning sessions across the engineering organisation.
- Stay current with emerging tools, frameworks and industry trends, and evaluate how they could benefit our stack.
- Continuously develop your skills, seek feedback and stay current with the latest developments in your field.
- Contribute to a culture of accountability, learning from mistakes and celebrating shared wins.
- Contribute actively to a positive, inclusive, supportive and collaborative team culture.
- Bring energy, curiosity and a solutions-focused mindset to everyday challenges.
- Plan and manage your workload to balance quality, speed and competing demands.
- Maintain accurate, thorough documentation and keep all relevant systems, tools and trackers up to date.
- Support onboarding, knowledge-sharing and documentation so the wider team can learn, scale and succeed.
- Take full ownership of your work, manage your own priorities and consistently deliver to a high standard and on time.
- Support and step in for teammates when needed to help the team meet its shared goals.
- Uphold the company's values, policies, security requirements and standards of professional conduct in all activities.
What we're looking for
7-11 years of professional experience in a Full Stack Engineer or similar roleStrong working knowledge of React, Node.js and MongoDB
Bachelor's degree in Computer Science (Master's preferred)
Excellent communication, problem-solving and teamwork skills
Benefits
At Onyx Industries, we believe that looking after our people is the foundation of doing great work. We offer a comprehensive, thoughtfully designed benefits and perks package that supports your health, your finances, your growth and your life outside of work. When you join us, you can expect the following:- Hybrid and remote-friendly working options, with the trust and autonomy to manage your own time and output.
- A real commitment to diversity, equity and inclusion, with employee resource groups and an open, respectful culture.
- A supportive, inclusive and collaborative culture where your ideas are genuinely heard and your contribution truly matters.
- Wellness perks such as gym and fitness-membership support, plus wellbeing initiatives throughout the year.
- Recognition of personal milestones with celebration leave and thoughtful gestures.
- Structured mentorship, regular feedback and clear, transparent career-progression frameworks to help you grow.
- Wellness initiatives throughout the year, from health talks and screenings to fitness challenges and mindfulness sessions.
- a generous annual leave allowance well above the statutory minimum, plus public holidays, because rest and time to recharge are essential to doing great, sustainable work.
- Support for relocation where relevant, to help you make a smooth move and settle in quickly.
- A culture that actively encourages experimentation, stretch projects and learning from both wins and mistakes.
- Company-funded health insurance with access to a wide network of hospitals and clinics, plus an annual preventive health check-up.
- Additional wellbeing and volunteering days each year to look after yourself and give back to your community.
- A home-office set-up allowance plus the laptop, equipment and tools you need to work comfortably and productively.
- Generous referral bonuses for helping us find and hire other great people to join the team.
- Employee stock options (ESOPs), giving you a genuine stake in the company's growth and long-term success.
- Transparent, structured pay bands and clear criteria for progression, so you always know how to grow your earnings.
- A competitive salary that is reviewed regularly and benchmarked against the market to keep your pay fair and current.
- Regular team lunches, celebrations, offsites and social events that make work more fun, human and connected.
- A modern, well-equipped office in a convenient location, with snacks, great coffee and plenty of collaborative space.
- A flat, low-ego environment where good ideas can come from anyone and are acted upon.
- Allowances and reimbursements for work-related expenses, handled quickly and without unnecessary bureaucracy.
- Commuter, transport and travel support to make getting to and from work easier and more affordable.
Education
Bachelor's degree in Computer Science (Master's preferred)