Senior Backend Engineer
Company Overview
Seedworld Studios is focused on innovating the gaming landscape with its upcoming AAA metaverse game, Seedworld. This game merges the captivating worlds of Fantasy and Steampunk. We are currently in search of a skilled and enthusiastic Senior Backend Engineer to join our Product Engineering team. In this role, you will be instrumental in developing our product application that underpins one of the largest metaverse endeavors in the industry. You will report to the Head of Engineering and collaborate closely with various teams to actualize our vision.
Responsibilities
Goal Ownership & Delivery: Take charge of team objectives to ensure impactful and timely achievement. Proactively identify and resolve inefficiencies or risks to meet both technical and business requirements.
Backend Development: Lead the creation and upkeep of scalable and efficient backend services using Node.js and TypeScript. Write clean, high-performance, and sustainable code.
System Design & Architecture: Drive the design and implementation of complex systems, making critical architectural decisions to align systems with technical and business needs.
API Design & Integration: Create and manage RESTful APIs, including integrating with third-party APIs, to facilitate smooth business processes and data exchange.
Database Management: Design, optimize, and maintain MongoDB databases to ensure data integrity, security, and scalability.
Monitoring & Optimization: Establish and enhance monitoring and alerting strategies, analyze system data, and ensure high availability and performance.
Code Quality & Reviews: Assume responsibility for the quality and reliability of codebases. Undertake code reviews, enforce best practices, and mentor team members for consistency and scalability.
Security Integration: Integrate security best practices into development processes, identify vulnerabilities proactively, and mitigate application risks.
Collaboration & Mentorship: Mentor team members to encourage continuous improvement. Collaborate with various teams, including frontend developers, product managers, and Web3 experts, to align development with business objectives.
Adaptability & Innovation: Work closely with stakeholders to adapt to changing priorities, foster innovations, and align multiple perspectives with business goals.
DevOps Practices: Collaborate on DevOps procedures like continuous integration, deployment, and managing cloud infrastructure (AWS).
User-Centric Focus: Ensure team strategies prioritize customers, balancing technical execution with user-centric design principles.
Documentation: Maintain current and detailed documentation for backend systems to ensure clarity and accessibility for team members.
Team Structure
You will function as a crucial part of a diverse product development team consisting of frontend/backend engineers, test engineers, UI/UX designers, product owners, and Web3 experts.
Company Culture
- Operates fully remotely on a global scale.
- Fosters an agile and inclusive work environment.
- Focuses on user-centric development and continuous enhancement.
- Driven by a passion for building impactful products and supporting team growth.
Requirements
Experience: A minimum of 6 years of professional experience in backend development or as a Senior Software Engineer.
Technical Expertise: Profound knowledge in Node.js, TypeScript, MongoDB, and REST API design. Experience with frameworks like Express or NestJS is preferred.
Leadership & Mentorship: Demonstrated ability to mentor team members, promote inclusivity, and uphold team culture.
Web3 Interest: Understanding or interest in the Web3 ecosystem, including wallets, transactions, IDOs/ICOs, and DeFi concepts.
User-Centric Development: Experience collaborating in user-focused settings, harmonizing technical requisites with customer needs.
Adaptability: Proven capability to manage changing priorities effectively and deliver high-quality results in fast-paced environments.
Desirable
- Extensive knowledge of the Web3 ecosystem and blockchain technology.
- Experience with high-risk environments such as payment platforms.
- Proficiency in AWS and infrastructure as code using tools like Terraform.
- Bachelor’s degree in computer science or related field.
Location
- Fully remote position.
- Flexible timezone within working hours falling between 9 AM to 10 PM (UTC).
Benefits
- 21 days of holiday per year in addition to local bank holidays.
- Sick days allowance.
- Budget for training and courses.
- Budget allocated for purchasing work equipment such as laptops.
Salary
Salary paid monthly in stablecoins (USDC).
Social Networking Service (SNS) Executive
Bitcastle is a cryptocurrency exchange and Forex (FX)platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-TimeSocial Networking Service (SNS) Executive to join our team.
About the Role:
We are looking for a Social Networking Service Executive to join the Bitcastle team. In this role, you will lead and execute our social media strategy to grow our brand presence across various platforms. You will manage content creation, community engagement, and campaign execution to strengthen our position in the crypto industry. This is a full-time, fully remote position.
Manage and maintain a strong presence across social media platforms, including X, Instagram, Facebook, LinkedIn, and TikTok, ensuring consistent messaging and tone
Conduct social listening to identify trending topics and emerging content within the cryptocurrency space
Monitor community feedback and collaborate with sponsorship, product, operations, content, and PR teams to deliver timely and relevant content
Create, curate, and manage engaging content tailored to each social media platform
Build and nurture a strong online presence by actively engaging with users, responding to inquiries, and fostering a positive community environment
Partner with communities and brands to boost visibility and establish meaningful collaborations
Track and analyze metrics such as engagement, reach, and growth across social accounts
Plan, execute, and manage social media campaigns, including product launches, contests, promotions, and events
Optimize campaigns to maximize user engagement and overall impact
Requirements:
At least 2 years of experience in social media content creation and management
Proven ability to develop and execute successful content strategies
Experience using social media analytics tools
Preferred Qualification:
Prior experience in social media management within the crypto industry
Deep interest in Web3, blockchain, and cryptocurrency developments
Understanding of social media SEO principles and platform algorithms
Full Stack Developer (Front End Leaning)
Winnables.com is looking for a creative front-end-leaning Full Stack Developer who loves bringing slick, engaging user experiences to life while still caring about the behind-the-scenes details.
You’ll collaborate closely with designers and product leads, iterate quickly on new ideas, and see the direct impact of your work in the hands of players around the world.
If you enjoy mixing imaginative front-end polish with just enough back-end know-how to make the magic happen, we’d love to hear from you.
Key Responsabilities:
Transform design mock-ups and product concepts into polished, responsive game screens, animations, and flows.
Collaborate daily with designers, product leads, and blockchain engineers to prototype, ship, and iterate on new games or new features.
Continuously test, debug, and optimize for performance across devices and network conditions.
Review code, share best practices, and help keep our small codebase clean, secure, and easy to extend.
Use player feedback and analytics to refine existing features and guide new ideas from concept to launch.
Champion accessibility and web-standards compliance, ensuring every player—regardless of device or ability—has a first-class experience.
What You’ll Be Building
Build interactive mini-games that deliver smooth, responsive gameplay.
Create real-time multiplayer features and live game mechanics.
Develop pack-opening systems with eye-catching, engaging animations.
Engineer raffle and lottery-style games that are fully on-chain and provably fair.
Implement Plinko and other physics-based games, tuned for fun and balance.
Craft user-friendly interfaces that perform flawlessly across mobile, tablet, and desktop.
Qualifications:
Tech Stack:
Core: TypeScript · React & Next.js · Node.js · Zustand · WebSockets & REST
Data & Infra: PostgreSQL (Supabase) · Redis · Docker · GitHub
Observability: Grafana · PostHog
Design & Web3: Figma · viem / wagmi
What We're Looking For
Strong experience with TypeScript and modern JavaScript
Solid understanding of React and Next.js ecosystem
Experience building real-time applications with WebSockets
Familiarity with Node.js backend development
Knowledge of PostgreSQL and database design
Experience with responsive design and mobile-first development
Understanding of state management patterns (Zustand experience preferred)
Understanding of web security fundamentals (CSRF protection, secure authentication flows, input validation)
Interest in gaming mechanics and interactive user experience.
Nice to Have
Experience with gaming or interactive application development
Knowledge of blockchain technologies and Web3 integration
Familiarity with monitoring tools (Grafana, PostHog)
Experience with Docker and containerization
Understanding of real-time multiplayer game architecture
Company Description:
Winnables.com is on a mission to re-imagine iGaming through full on-chain transparency. We believe players deserve provably fair odds, transparent math, and no black-box RNGs. Every spin and ticket purchase is recorded immutably on Ethereum, so anyone can audit the outcome, track prize pools, or even build their own analytics on top of our contracts.
All of our games are designed and engineered 100% in-house by a small, senior team that blends game design, cryptography, and smart-contract security. We currently operate two flagship experiences:
Raffles – transparent prize drawings where every ticket lives on-chain, letting players verify fairness before and after the draw.
Loot Packs – blockchain-powered loot boxes that reveal randomized rewards with engaging pack-opening animations.
We’re still just getting started. The roadmap is full of green-field challenges—and real, measurable impact on an industry ripe for change. Join us and help craft the next generation of fair, fun, and truly player-owned gaming.
Founding Head of Engineering
DevOps Engineer
Responsibilities:
Architect zero-downtime multichain ops (Arbitrum/BASE rollups, fraud-proof autoscaling)
Design self-healing node clusters that counter NFT minting DDoS attacks in <5ms
Embed on-chain circuit breakers to halt exploits before they drain $CORE liquidity
Turn Discord FUD storms into infra stress metrics via custom LLM pipelines
You’re a Fit If:
You’ve slashed gas costs by 30%+ in past DeFi/GameFi projects (prove it)
Your idea of “monitoring” includes MEV bot behavior and DAO vote latency
You’ve built systems where “chaos testing” means simulating chain splits during PvP wars
You see player rage-quits as a critical infrastructure metric
Compensation:
Base + % of rescued gas fees (paid in $CORE)
NFT “Backbone” Pass (permanent % of protocol revenue)
DAO voting power scaled to uptime milestones (*99.99% SLA = veto rights*)
Moderator needed for TG group
crypto and memecoin experience is essential
1 sol per week
expected to be online 8 hours per day