Blockchain Security Technical Support Engineer
At our organization, the commitment to user security is overseen by a proficient Security Team consisting of seasoned cybersecurity professionals on a global scale. This team leads the company's efforts in Security, Privacy, and Security Compliance. Known for holding international patents for technologies integral to our security systems, the team is guided by a renowned CISO who is a member of the Forbes Technology Council and ranked among the Global Top 100 CISOs.
Reporting directly to the CEO, our Chief Information Security Officer ensures that security remains a top priority within our organizational structure. The team upholds industry standards and boasts certifications including ISO27001, ISO27701, ISO22301, PCI:DSS 3.2.1 (Level 1), NIST Tier 4, SOC 2 Type II, and the MPI License from Singapore MAS.
In addition to qualifications, our Security Team values practical experience, quick thinking, and continuous learning to navigate the ever-evolving challenges within the crypto industry. This enables them to preempt potential threats and safeguard our user base effectively.
We are seeking an individual passionate about Web3 and blockchain technology, with hands-on experience in writing smart contracts and ideally staking on various blockchain networks. The ideal candidate will be a blockchain expert within the organization and expected to research and understand new blockchains as they emerge frequently in the industry.
The role requires a strong understanding of practical blockchain applications, focusing on smart contracts, staking, and supporting blockchain ecosystems. Initially centered around the Solana ecosystem, the responsibilities will later extend to include others like Cronos/Cronos zkEVM.
Responsibilities:
- Understanding and deploying/maintaining/monitoring smart contracts on Solana/EVM
- Developing in-depth knowledge of supported blockchains and researching new blockchain additions
- Keeping abreast of software updates and other significant blockchain developments
- Communicating blockchain/DApps knowledge effectively to internal teams
- Troubleshooting blockchain-specific alerts and issues
Requirements:
- Proficient in client service within high-pressure environments
- Experience supporting applications in a 24/7 setting
- Sound knowledge of blockchain ecosystems, protocols, and DApps
- Hands-on experience in running blockchain nodes, writing smart contracts, staking, governance, and bridges
- Familiarity with programming languages like Rust, Solidity, Javascript, Node.js, and Python
- Task ownership of technical documentation
- Attentive to detail with an analytical mindset
- Adaptive to varying work conditions
- Strong English communication skills, both verbal and written
Working at our Company:
- Enabling employees to explore new opportunities and fostering a supportive work culture
- Providing a proactive and transformational work environment, encouraging innovation
- Facilitating personal and professional growth through skill development
- Emphasizing teamwork and collaboration towards achieving organizational goals
Benefits:
- Competitive salary
- Comprehensive medical insurance coverage for employees and dependents
- Generous annual leave entitlement
- Flexible work arrangements and remote options
- Internal mobility program for diverse career development opportunities
- Work perks include a company-provided crypto visa card
About our Organization:
With 80 million customers worldwide, our company is a rapidly growing global cryptocurrency platform, established in 2016. Our vision is to make cryptocurrency accessible to everyone through innovation and compliance, fostering a fair and equitable digital ecosystem.
Applicants' personal data will be used solely for recruitment purposes. Note that only shortlisted candidates will be contacted for further consideration.
Junior/Mid Decentralized Infrastructure Engineer
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.
Senior Decentralized Infrastructure Engineer
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.
Web3 Fullstack Developer
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.
Junior AI Engineer
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.
AI Agent Engineer
Join one of our high-conviction AI-native portfolio companies and build autonomous AI agents from the ground up. You’ll design agent architectures, implement tool-calling & memory systems, connect them to browsers/shell/APIs, run long-horizon tasks, and ship features that make the product feel alive and truly useful.
Skills & Requirements:
2–5 years building LLM-powered agents (LangGraph, CrewAI, ReAct, custom frameworks)
Strong Python skills + experience with tool calling, RAG, vector stores and evaluation
Bonus: familiarity with browser automation, self-hosted models or decentralized compute
Fast executor who loves shipping in ambiguity
Passion for agents that actually do real work (not just chat)
Salary: $160,000 – $230,000 USD base + meaningful equity (in the portfolio company) + full benefits + carry from Sirex network
Description:
Sirex.vc doesn’t only write checks — we actively help our portfolio companies recruit the best people on the planet. This AI Agent Engineer role is inside one of our fastest-moving startups building the next generation of autonomous agents. You’ll get direct support, intros, and operational help from the Sirex team while working on frontier technology that can change how the world uses AI.
High risk. Zero apologies.