Senior Backend Engineer-Kotlin (VN)

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About Sharesource:We are a BCorp company whose purpose is to democratise opportunities for individuals from developing countries. With our brand and culture empowering our partners to attract and keep the most qualified members, we share the knowledge to unleash potential and grow scaling teams for Australian and Canadian businesses.This project's mission is to empower people to realise the full value of their skills. Millions of users rely on the marketplace to get things done, and the platform team makes that possible behind the scenes.We invest in conventions, tooling, and systems that help engineers and support staff do their best work.As the project expands globally, the team is building secure, scalable foundations that enable trust, seamless payments, and sustainable growth.What are we looking for?We're looking for a Senior Backend Engineer with deep Kotlin experience to join our platform team. Over the next year, we'll be focusing on complex challenges in authentication, payments,and moderation.You'll be hands-on in designing and delivering these systems, with plenty of scope to shape how they're built.We work remotely across Portugal and Vietnam. The team runs async-first, with a couple of hours' overlap each day for the occasional sync.What are you expected to do?

Build and maintain backend services in Kotlin, with some work in Ruby as well.
Lead development of auth, payments, and moderation features with security and reliability front of mind.
Design schemas and queries for relational databases (Postgres), using caching where it makes sense.
Contribute to technical direction and help set conventions for the wider engineering group.
Write clean, tested code and take part in thoughtful code reviews.
Collaborate across time zones in English, both written and spoken.

What sets this job apart?

Work on high-impact systems that underpin a global marketplace.
A product-focused team with strong autonomy and a strong background in building startups.
Real influence on technical direction, not just implementation.
Async-first, flexible work setup.
A diverse, multilingual team where everyone's input counts.

You'll be a great fit if:

You have at least 5+ years of professional experience in backend engineering.
You have a strong background in Kotlin (or another JVM language) and keen to work across Ruby andKotlin.
You have a solid grasp of authentication, authorisation, and API security
You have experience with payments or similar high-reliability systems.
You are comfortable with monitoring/observability tools (Datadog, Prometheus, etc.), Git, and CI/CD.
You have a good understanding of caching (Redis/Memcached) and SQL optimisation.
You are proactive and reliable — someone who spots issues early and takes ownership.

We will be absolutely thrilled if you also have the following:

Exposure to Kubernetes and AWS.
Experience with microservices or event-driven systems.
Infrastructure-as-code (Terraform or similar).
Any experience with trust & safety, fraud detection, data privacy, or payment systems.

Please note: This role is remote; however, we require candidates to be based locally in the Vietnam. This is to support occasional onsite activities such as team events, client meetings, or equipment handover. Additionally, local residency is necessary for compliance with Vietnam labor laws and employment regulations.Here are the benefits of joining our team:

Competitive salary and professional development
Collaborative client partnerships and a fun, inclusive work environment
Opportunities for leadership, expertise, and global client exposure
Monthly coaching, training, and career development
A flexible hybrid model
Engage in social impact activities and industry impact
Achieve work-life balance and flexibility to support personal commitments
Benefit package such as: 15 annual leave days/year, 13 months of salary, social insurance based on full salary- to add this one on VN benefits

Why work for Sharesource?Our clients come from all walks of life and so do we. We hire hundreds of skillful individuals from a wide variety of backgrounds, genders, ages, and personalities to live out our diverse culture and make a positive impact on the world!Our 5 Values:

Make a social impact: We balance our work for client teams and for society by constantly making a positive impact.
Be proactive: We encourage brave thinking and continuous improvement, and drive change through action.
Create value: We create measurable values for our stakeholders: our teams, partners, suppliers, investors, and communities.
Be fair, open and honest: We foster equality and inclusivity in a supportive environment that embraces diversity and celebrates achievements.
Add fun, passion and love: We prioritise fun and passion, fostering higher engagement and a positive can-do attitude.

What makes us different?Our culture code. You will be a part of our vibrant company culture and experience a workplace where your contributions are valued, your growth is encouraged, and your opinion is respected:

Challenged, autonomous, momentum
Learning, growth mindset
Lead by our values
Heard, cared for, make good friends

What happens after you submit your application?The whole process takes around 4 weeks:

There will be 3-4 interviews and a possible assessment from our client partner. You will undergo an initial interview, a culture interview, and 1-2 interviews with our cool client. This will run for about 1-2 weeks but we will let you know if we need to ramp it up. Be yourself and have fun.
We will constantly communicate with you as to the development of your application. You can also directly communicate with us to ask us about the status of your application.
If all goes well, we complete the reference check and provide other necessary requirements so we can offer you the job right away.

We would be grateful if you have these already:

Health Check Up
Identification Card/Passport
Social Insurance Number
Personal Income Tax Number
Character references with contact info

At Sharesource, we believe in the value of diversity and inclusion. We are committed to creating a diverse, respectful, and inclusive workplace, and we do not discriminate based on factors such as race, gender, religion, sexual orientation, or disability.

Sharesource

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