Senior Software Engineer (Backend & API Services)
Singapore
Full time
Office
Compensation is not specified
Role
Software Engineer
Description
Update
At Headquarters (HQ.xyz), we are dedicated to transforming how Web3 Teams handle their financial activities using blockchain innovations. We aim to bring forth a paradigm shift in how businesses manage their financial operations by offering a platform where companies can configure their FinOps setups with ease. Our working environment mirrors that of a high-performing sports team, comprising motivated individuals striving towards a shared objective. We strongly emphasize empathy and humility in our interactions within the company.
Key Responsibilities:
In the role of Senior Software Engineer within the Backend & API Services Team, you will have the chance to tackle complex challenges currently faced by the team. For instance, we are actively reimagining approaches to multi-factor authentication for crypto wallets to enhance user experience. We seek individuals enthusiastic about developing products and tools, adept at handling various project components.
- Collaborate closely with the Product Team to introduce valuable features for our users
- Manage delivery responsibilities from concept to deployment
- Create resilient APIs, libraries, and tools to support critical user services
- Provide guidance to software engineers, establishing standards for HQ's future engineers (Note: This is an Individual Contributor position)
- Identify and prioritize enhancements for the team's processes, codebases, and best practices proactively
Required Skills and Experience:
- Proficiency in Typescript & NestJS
- Experience with deploying production applications using Web3 technologies like block explorers and smart contracts
- Hands-on expertise in crafting scalable APIs
- Thorough comprehension of web application operation encompassing security, session management, and development best practices
- Proficient in deploying and maintaining production systems
- Sound understanding of the development life cycle
- Familiarity with micro-services, cloud computing, DevOps practices, relational databases, SQL, and GraphQL
- Strong written and verbal communication skills along with excellent interpersonal abilities
- Capable of making tech-oriented decisions using data insights for architectural planning and project prioritization
- Bonus for previous industry experience or startup exposure
Minimum Requirements:
- 5-7 years experience in launching APIs and Backend Services in a production setting
Skills Required
hq.xyz
Website
www.hq.xyzCompany size
Not specified
Location
United States
Description
Not specified
John Waldron
🚀 Hiring Solana Developers – Pump.fun
Montana City, USA
Montana City, USA
Full time
Remote
Solana Developer Needed – Pump.fun Style Platform (Starter Code Available)
Hi,
I’m reaching out from Valiant Solution LLC. We’re currently working with a U.S.-based client who is an experienced crypto professional and we’re looking for a skilled Solana developer to help build a platform similar to Pump.fun.
We already have a basic codebase from GitHub that the developer can start from, so the project will mainly involve customizing, improving, and completing the functionality rather than building everything from scratch.
Key requirements:
• Experience with Solana smart contracts (Rust / Anchor)
• Knowledge of token launch mechanics and bonding curves
• Experience with Solana Web3 integrations
• Ability to work with an existing codebase and extend it
If this sounds interesting, please reply with:
• Your Solana development experience
• Links to relevant projects or GitHub
• Your availability for a quick discussion
Looking forward to connecting.
Best regards,
Valiant Solution LLC
Hi,
I’m reaching out from Valiant Solution LLC. We’re currently working with a U.S.-based client who is an experienced crypto professional and we’re looking for a skilled Solana developer to help build a platform similar to Pump.fun.
We already have a basic codebase from GitHub that the developer can start from, so the project will mainly involve customizing, improving, and completing the functionality rather than building everything from scratch.
Key requirements:
• Experience with Solana smart contracts (Rust / Anchor)
• Knowledge of token launch mechanics and bonding curves
• Experience with Solana Web3 integrations
• Ability to work with an existing codebase and extend it
If this sounds interesting, please reply with:
• Your Solana development experience
• Links to relevant projects or GitHub
• Your availability for a quick discussion
Looking forward to connecting.
Best regards,
Valiant Solution LLC
Payment in Crypto
Sirex
Junior/Mid Decentralized Infrastructure Engineer
Full time
Remote
Role:
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements:
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects)
Solid Python / Rust / Go skills
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements:
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects)
Solid Python / Rust / Go skills
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Payment in Crypto
Sirex
Senior Decentralized Infrastructure Engineer
Full time
Remote
Role:
Build and scale production-grade decentralized infrastructure: compute networks, protocols, storage layers, orchestration for AI workloads, and open-source primitives that power the next generation of agent systems.Skills &
Requirements:
4+ years in blockchain infra, distributed systems or high-scale compute
Deep experience with Rust / Go / C++ and protocols (libp2p, IPFS, custom consensus, GPU orchestration)
Bonus: self-hosted AI compute, decentralized training or edge inference
Ship fast, own uptime, love extreme performance and cost efficiency
Salary:
$175,000 – $255,000 USD base + big equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug elite builders straight into our fastest portfolio companies.
This is your chance to build the actual rails for autonomous agents and open digital economy at scale. Zero bureaucracy, maximum leverage.
High risk. Zero apologies.
Build and scale production-grade decentralized infrastructure: compute networks, protocols, storage layers, orchestration for AI workloads, and open-source primitives that power the next generation of agent systems.Skills &
Requirements:
4+ years in blockchain infra, distributed systems or high-scale compute
Deep experience with Rust / Go / C++ and protocols (libp2p, IPFS, custom consensus, GPU orchestration)
Bonus: self-hosted AI compute, decentralized training or edge inference
Ship fast, own uptime, love extreme performance and cost efficiency
Salary:
$175,000 – $255,000 USD base + big equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug elite builders straight into our fastest portfolio companies.
This is your chance to build the actual rails for autonomous agents and open digital economy at scale. Zero bureaucracy, maximum leverage.
High risk. Zero apologies.
Payment in Crypto
Neonflick
Web3 Fullstack Developer
Part time
Remote
🌐 About Us
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.
Sirex
Junior AI Engineer
Full time
Remote
Role:
Join one of our fast-growing portfolio startups and help build simple AI features. You’ll work with large language models, create basic automations and chat tools, test ideas, fix small bugs, and integrate AI into everyday products.
Skills & Requirements:
0–2 years of experience (fresh graduates or self-taught welcome)
Basic Python knowledge
Interest in AI, LLMs or chatbots (personal projects are a big plus)
Quick learner who enjoys trying new things
Good English for team communication
Salary: $95,000 – $135,000 USD base + equity in the startup + full benefits
Description:
Sirex.vc not only invests — we actively help our portfolio companies hire great people. This Junior AI Engineer role is inside one of our AI-native startups. You’ll get real hands-on experience, learn from the best, and build things users actually use — all with full support from the Sirex team.
High risk. Zero apologies.
Join one of our fast-growing portfolio startups and help build simple AI features. You’ll work with large language models, create basic automations and chat tools, test ideas, fix small bugs, and integrate AI into everyday products.
Skills & Requirements:
0–2 years of experience (fresh graduates or self-taught welcome)
Basic Python knowledge
Interest in AI, LLMs or chatbots (personal projects are a big plus)
Quick learner who enjoys trying new things
Good English for team communication
Salary: $95,000 – $135,000 USD base + equity in the startup + full benefits
Description:
Sirex.vc not only invests — we actively help our portfolio companies hire great people. This Junior AI Engineer role is inside one of our AI-native startups. You’ll get real hands-on experience, learn from the best, and build things users actually use — all with full support from the Sirex team.
High risk. Zero apologies.
Payment in Crypto