Senior Full Stack Engineer
SlashIndonesia1 day ago
Job descriptionLead the end-to-end development of applications across front-end (Flutter) and back-end (Python / FastAPI). Architect, design, and implement scalable systems and APIs, ensuring reliability and performance. Collaborate with hardware / firmware engineers for integration, while focusing primarily on software layers. Guide decision-making around technical priorities, trade-offs, and system architecture. Mentor team members and provide leadership in project execution. Own and optimize the deployment pipeline using Docker and Google Cloud Platform services (Cloud Storage, Cloud Run, Cloud Tasks). Manage WebSocket streaming, background processing, and Bluetooth communication within mobile applications. Support occasional website updates (HTML, CSS tweaks) for the marketing site. Lead and scope technical ownership based on project needs : Partner with Hardware / Firmware Engineer for hardware / firmware updates. Handle UI / App updates (both front-end and back-end) independently or in collaboration. Drive backend optimizations and new feature development with a focus on scalability and performance. Balanced Full Stack Development expertise (50 / 50 front-end and back-end). Strong Mobile Development experience with Flutter (Bluetooth APIs, background processing). Proficiency in Backend Development with Python (FastAPI). Experience with Cloud & Containerization (Docker, Google Cloud Platform services). Ability to work independently, communicate clearly, and translate requirements into scalable solutions. Familiarity with APIs such as OpenAI, Deepgram, Hume AI, or other transcription / audio services (nice to have). Understanding of audio codecs (OPUS, PCM / WAV), bandwidth optimization, and audio frame handling (nice to have). Experience with basic web coding (HTML, CSS) for quick marketing site tweaks (nice to have). Proven experience as a Tech Lead — not just an individual contributor. Track record of leading technical projects, making architectural decisions, and mentoring engineers. Prior experience in startup or fast-paced environments is a strong plus. Deep expertise in AI / ML, DevOps, hardware, or firmware is not required (covered by dedicated specialists). Significant project ownership and the opportunity to make a real impact on our product. A clear path for career growth, with opportunities for leadership and mentorship. A dynamic and collaborative work environment that fosters creativity and innovation. Access to continuous learning and development, including workshops and internal training sessions. Support for professional growth, with a dedicated budget for education and certifications.
About Slash
At Slash, we've been building digital products people love since 2016. We're a boutique tech studio and venture builder with a global community of 50+ engineers, designers, and builders. We partner with startups and established brands to shape a better digital future. We believe in kindness, care, self-leadership, and rising together—values that connect our community across our headquarters in Singapore and community-oriented R&D hubs in Phnom Penh, Jakarta, Bandung, Yogyakarta, and Bali. This time, we've been asked by one of our clients to find a Senior Full Stack Engineer to join their team.
About our Client's Product
Our client is developing an emotional insight tool—a platform that helps people understand how they feel, why they feel it, and what that means over time.
The product is live and growing fast. Recent milestones include :
- Faster performance and improved UX
- Streamlined collaboration through better processes
- A successful public release, paving the way for broader adoption
Now, it's time to scale. We're adding depth, features, and resilience to the product—and you'll be at the heart of that journey.
Roles and responsibilities, and how will the role make an impact?
How do you know if you are a good fit?
What's in it for you?
Ready to shape the future of emotional insight?
If you're a Tech Lead Full Stack Engineer who thrives on technical challenges, loves building impactful products, and wants to play a pivotal role in bringing our product to its next stage of growth, we'd love to hear from you.
How do you apply?
Interested applicants are encouraged to submit application through our career site or submit your CV to
For more information, visit us
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Senior Engineer • Indonesia
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