Full Stack Engineer - Go (Mojito Product Team)

Serotonin is a marketing firm and product studio that specializes in bringing transformative technologies to market, focusing on web3, AI, and biotech sectors.

Serotonin

Employee count: 11-50

DK, DE + 3 more

Stay safe on Himalayas

Never send money to companies. Jobs on Himalayas will never require payment from applicants.

Mojito is building the leading platform for crypto-native commerce and community. We empower brands and creators to launch digital experiences, marketplaces, and tokenized products with a seamless Web3 toolkit. Our team combines deep expertise in crypto, software, and consumer experiences, backed by top-tier investors and partners.

We’re looking for a Founding Full-Stack Engineer to join our core product team. This is a unique opportunity to own the architecture and implementation of a platform at the intersection of Web3 and consumer experiences. You’ll work across the stack — from frontend to backend to infrastructure — while helping define the technical culture and trajectory of the company.

What You’ll Do

Lead the design and development of new product features across a Next.js frontend and Go-based backend
Operate and evolve our GCP/Kubernetes infrastructure for scalability and reliability
Build high-performance APIs and distributed microservices in Go + PostgreSQL, with a focus on SQL optimization and caching
Architect and deploy smart contracts (Solidity / Move) on Ethereum and Sui, with security and robustness as top priorities
Establish engineering best practices for code quality, observability, testing, and performance from the ground up
Partner closely with the founding team on product strategy, architecture, and roadmap

What We’re Looking For

Hands-on production experience with Go, Next.js, SQL optimization, and Kubernetes
Deep familiarity with PostgreSQL, Docker, GCP, NATS, and caching strategies
Strong skills in building scalable UIs, APIs, and distributed microservices
Crypto-native mindset with smart contract development experience (Solidity on Ethereum, Move on Sui)
Bonus: Strengths in performance tuning, observability, and tooling

The Ideal Mindset

You thrive in an early-stage startup environment and embrace founder-like ownership
You’re motivated to build and scale products that push the boundaries of Web3
You care deeply about quality, security, and user experience
You’re excited to help shape the technical and cultural foundation of Mojito

Apply now

Please let Serotonin know you found this job on Himalayas. This helps us grow!

Apply now

About the job

Apply before

Jan 28, 2026

Posted on

Nov 29, 2025

Job type

Full Time

Experience level

Mid-level

Location requirements

Hiring timezones

Germany +/- 0 hours, and 4 other timezones

About Serotonin

Learn more about Serotonin and their company culture.

View company profile

Serotonin is a go-to-market platform for web3, AI, and biotech. They assist companies in building the future by taking care of strategy, recruiting, and legal work. The firm aims to bring the world's breakthrough technologies to market. As a marketing firm and product studio for transformative technologies, Serotonin partners with top businesses and entrepreneurs to deliver brand positioning, media relations, content creation, product marketing, and go-to-market strategy.

With a team composed of former executives from notable firms such as ConsenSys and Chainlink, Serotonin combines expertise in financial services and digital assets with a data-driven methodology. This ensures that their partners' marketing and public relations efforts are executed flawlessly, resulting in substantial growth. The firm is committed to creating ecosystems around technologies to foster collaboration and innovation within the web3 space, showcasing a focus on building the future through strategic partnerships and a deep understanding of emerging technologies.

Apply now

Please let Serotonin know you found this job on Himalayas. This helps us grow!

Apply now