Full Sack Engineer - Go (Mojito Product Team) at Serotonin

Copenhagen, Denmark

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Not SpecifiedCompensation

Senior (5 to 8 years)Experience Level

Full TimeJob Type

UnknownVisa

Web3, CryptocurrencyIndustries

Requirements

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
Thrive in an early-stage startup environment and embrace founder-like ownership
Motivated to build and scale products that push the boundaries of Web3
Care deeply about quality, security, and user experience
Excited to help shape the technical and cultural foundation of Mojito

Responsibilities

Lead the design and development of new product features across a Next.js frontend and Go-based backend
Operate and evolve 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

Skills

Key technologies and capabilities for this role

GoNext.jsKubernetesGCPPostgreSQLDockerNATSSolidityMoveEthereumSuiSQL

Questions & Answers

Common questions about this position

What is the employment type for this position?

This is a full-time position.

What technical skills are required for this Full-Stack Engineer role?

Required skills include hands-on production experience with Go, Next.js, SQL optimization, and Kubernetes, deep familiarity with PostgreSQL, Docker, GCP, NATS, and caching strategies, plus strong skills in building scalable UIs, APIs, and distributed microservices.

What experience with smart contracts is needed?

A crypto-native mindset with smart contract development experience in Solidity on Ethereum and Move on Sui is required.

What is the company culture like at Mojito?

The team combines deep expertise in crypto, software, and consumer experiences, thrives in an early-stage startup environment with founder-like ownership, and focuses on building and scaling Web3 products while caring deeply about quality, security, and user experience.

What makes a strong candidate for this role?

Strong candidates thrive in early-stage startups with founder-like ownership, have a crypto-native mindset, and are excited to shape the technical and cultural foundation while prioritizing quality, security, and user experience.

Serotonin

Marketing firm specializing in blockchain solutions

About Serotonin

Serotonin provides marketing and product development services specifically for technology and blockchain companies. The firm helps clients create effective marketing strategies, launch products, and enhance their media presence. By utilizing their knowledge in digital marketing and blockchain, Serotonin positions brands to achieve significant market impact. What sets Serotonin apart from competitors is its specialized focus on breakthrough technology and Web3 startups, along with a team of experts who bring a wealth of experience in both marketing and technology. The goal of Serotonin is to empower its clients to succeed in the fast-paced tech landscape by delivering tailored solutions that drive growth and visibility.

New York City, New YorkHeadquarters

2020Year Founded

$2.9MTotal Funding

VENTURE_UNKNOWNCompany Stage

Consulting, Crypto & Web3Industries

51-200Employees

Benefits

Competitive Salary

Health Insurance

Remote Work Environment

Risks

Emerging blockchain marketing firms increase competition, potentially diluting market share.

Rapid Web3 technology evolution may outpace Serotonin's current capabilities.

Negative perception of Web3 gaming could hinder effective marketing efforts.

Differentiation

Serotonin specializes in transformative technology and blockchain solutions for tech startups.

The company offers comprehensive marketing strategies and product development services.

Serotonin's team has expertise in digital marketing, blockchain, and public relations.

Upsides

Growing interest in Web3 and blockchain in the Middle East offers expansion opportunities.

On-chain competition platforms like JokeRace present new markets for Serotonin's services.

Demand for improved UX in Web3 gaming aligns with Serotonin's consulting expertise.

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