Full Stack Engineer (Contract) (Tokyo, Tokyo, JP, 100-0005)

RWE Supply & Trading Asia-Pacific Pte. Ltd.,  Tokyo

To start as soon as possible, full time, Contractor

Functional area: IT / Digital 

About the role

Step into a high-impact role at the heart of RWEST’s APAC trading operations. You’ll be the primary engineer in Tokyo, owning the full stack from frontend through data to cloud, and shaping how mission-critical tools evolve as the business scales. If you enjoy building while modernising — and turning today’s business-built solutions into engineered, reliable platforms this is your moment.

• Design, build and continuously improve trading and operational systems for the Tokyo Trading Team, keeping day-to-day operations smooth
• Re-platform legacy, business-built tools for scale, reliability and maintainability  without disrupting the desk
• Develop web applications using AngularJS (frontend) and FastAPI (backend), and automate workflows with Python
• Operate and enhance cloud infrastructure on AWS and/or Azure, strengthening monitoring, resilience and availability
• Own data flows for Japan: onboard market and vendor datasets, ensure data quality, consistency and timely availability
• Upgrade key capabilities such as HJKS outage data processing and the OCCTO Interconnector Dashboard for performance, usability and analytics readiness
• Act as the go-to liaison between the Tokyo Trading Team and APAC technology stakeholders, resolving issues promptly and taking part in limited weekend on-call rotations

Job requirements and experience

• Hands-on experience building and operating modern web applications and services (e.g. AngularJS, FastAPI, Python) or comparable frameworks and languages
• Practical exposure to AWS and/or Azure with a focus on reliability, monitoring, automation and operational troubleshooting
• Sound data engineering fundamentals across pipelines, validation, reconciliation and performance tuning (e.g. Dremio/Tableau)
• Ability to translate trading desk needs into pragmatic technical solutions; comfortable partnering with traders and schedulers
• Ownership mindset with the courage to decide, take smart risks, learn from failure and deliver measurable outcomes in a fast-moving environment
• Collaborative, inclusive teammate who acts as #TeamRWE: shares knowledge, seeks and provides feedback, and champions health, safety and respect

Advantageous, but not essential

• Background or basic knowledge in the power or energy trading industry
• Knowledge of cloud cost optimisation practices
• Experience with Terraform or other Infrastructure as Code (IaC) tools
• Familiarity with CI/CD pipelines and DevOps practices
• Experience working in a cross-border, multicultural team environment

What we value most is someone who continuously demonstrates courage, thrives to create impact and seeks to build trusting, collaborative relationships. So, even if you think you do not yet display all of the skills listed above we would still like to hear from you.

Further we welcome applications from individuals who may not be able to commit to full-time roles. At RWEST, finding the right person for the job is our top priority, and we are willing to explore flexible arrangements.

Your benefits

Based in Tokyo, you’ll gain immediate visibility and influence within a close-knit APAC IT community supporting a fast-moving trading business. We offer a comprehensive package designed to support your well-being as well as your personal and professional growth. Here’s what you can look forward to:

• Direct impact in a small, focused team where your work is seen and felt from day one
• Regional reach — work at the heart of Tokyo’s trading scene and influence APAC-wide initiatives
• Exposure to a fast-paced energy and commodity trading environment
• Autonomy to shape technical decisions and own the full stack for the Tokyo Trading Team

rwe.com/career

Apply now with just a few clicks: ad code 92733

Any questions? Aruna Richard (Recruiting), E: aruna.richard@rwe.com

We look forward to meeting you. Of course, you can find us on LinkedIn, Instagram, Facebook, YouTube and Xing, too.

We value diversity and therefore welcome all applications - regardless of gender, disability, nationality, ethnic and social origin, religion/belief, age, sexual orientation, and identity. #inclusionmatters

RWE Supply & Trading is our connection to the world’s energy markets. Headquartered in Essen, Germany, the company operates one of Europe’s largest and most advanced energy trading floors. A diverse team of over 2,200 professionals from around 90 countries trades electricity, gas, commodities, and CO2 emission allowances. With precise market analysis and a strong customer focus, we create innovative energy supply solutions and tailored risk management concepts for industrial clients.

We also ensure the commercial optimisation of RWE’s power plant portfolio and markets the electricity generated by RWE. In addition, legally independent RWE gas storage companies operate in Germany, contributing to a secure energy supply