Senior Engineer - Platform Risk(Java)
Hong Kong
Full time
Office
Compensation is not specified
Role
Backend Engineer
Description
Who We Are
At OKX, we believe that technology is reshaping our future. Founded in 2017, OKX is a leading cryptocurrency spot and derivatives exchange that has embraced blockchain technology. We offer a wide range of diverse and advanced products, solutions, and trading tools in the financial ecosystem. With over 20 million users in 180 regions, our goal is to provide a platform that empowers individuals to explore the world of crypto. In addition to our exchange, we have OKX Insights, a research arm focused on the latest trends in the cryptocurrency industry. Our vision is to create a world of financial access backed by blockchain and decentralized finance.
We value our people as much as technology. Our culture promotes teamwork, embraces change, and fosters a friendly and diverse environment for our employees. We believe in creating equal opportunities for everyone to develop and thrive.
About the Platform Tool Team
The Platform Tool team is responsible for providing infrastructure support to different teams within OKX. This includes message delivery abilities such as email, push notifications, and SMS, as well as managing the notification center and verification codes. Our aim is to help the tech teams streamline their work and improve their development efficiency.
What You’ll Be Doing:
- Coordinating the backend requirements, technical design, and development of the message delivery business.
- Optimizing system performance, solving technical problems, and ensuring high availability, reliability, and performance.
- Driving workflow optimization, improving cross-team communication, and enhancing team collaboration.
- Leading the team in technology reserves, taking on team responsibilities, and nurturing technical talent.
What We Look For In You:
- Strong foundation in Java, with a deep understanding of JVM configuration optimization, IO, multi-threading, concurrent frameworks, data structures, algorithms, and design patterns. Demonstrating good programming practices and substantial work experience.
- Familiarity with common middleware such as MQ, RPC, caching, message queues, and MySQL.
- In-depth understanding of distributed system principles, including CAP theorem, consistency, and idempotent operations.
- Clear logical thinking, agile mindset, and excellent communication skills.
- Strong team management and architectural design capabilities, with preference for those with team management experience.
- Preferred experience in integrating and developing platforms for email, SMS, push notifications, etc.
Perks & Benefits
- Competitive total compensation
- Comprehensive insurance coverage for employees and dependants
- More benefits to be communicated during the hiring process!
Skills Required
OKX
Website
www.okx.comCompany size
Not specified
Location
United States
Description
Not specified
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
Sirex
AI Agent Engineer
Full time
Remote
Role:
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.
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.
Payment in Crypto
Sirex
Investment Analyst
Full time
Remote
Role:
Help the team find and evaluate early-stage startups. Search for promising projects, do quick market checks, prepare short summaries, track portfolio companies, and assist with basic due diligence.
Skills & Requirements:
0–2 years of experience (recent graduates or startup background welcome)
Strong interest in AI, crypto, and new technologies
Good at research, writing clear notes, and using spreadsheets
Organized, fast learner, and comfortable with uncertainty
English at upper-intermediate level
Salary:
$85,000 – $115,000 USD base + small carry + full benefits
Description:
At Sirex.vc we back crazy ideas in AI and decentralized tech. As Investment Analyst you’ll be right in the middle of the action — scanning hundreds of startups every week, learning how real venture works, and helping decide where we put money. Perfect first step into VC for someone hungry and smart. High risk. Zero apologies.
Help the team find and evaluate early-stage startups. Search for promising projects, do quick market checks, prepare short summaries, track portfolio companies, and assist with basic due diligence.
Skills & Requirements:
0–2 years of experience (recent graduates or startup background welcome)
Strong interest in AI, crypto, and new technologies
Good at research, writing clear notes, and using spreadsheets
Organized, fast learner, and comfortable with uncertainty
English at upper-intermediate level
Salary:
$85,000 – $115,000 USD base + small carry + full benefits
Description:
At Sirex.vc we back crazy ideas in AI and decentralized tech. As Investment Analyst you’ll be right in the middle of the action — scanning hundreds of startups every week, learning how real venture works, and helping decide where we put money. Perfect first step into VC for someone hungry and smart. High risk. Zero apologies.
Sirex
Operating Partner
Full time
Remote
Role:
Work side-by-side with portfolio founders to scale their companies at speed. Lead talent acquisition for critical roles, build operational systems and processes, shape go-to-market strategy, track key metrics, and support follow-on fundraising.
Skills & Requirements:
4–6+ years of hands-on experience in high-growth startups (previous Head of Operations, Chief of Staff, or founding team member strongly preferred)
Deep understanding of AI, decentralized infrastructure or developer platforms
Strong talent network and proven ability to recruit top technical talent
Exceptional execution skills and comfort operating in ambiguity
Data-oriented and systems thinker
Salary:
$175,000 – $245,000 USD base + significant carry + equity + full benefits
Description:
Sirex.vc doesn't just invest — we build alongside our founders. As Operating Partner, you will be the difference-maker for our portfolio companies, rolling up your sleeves to help them move faster and smarter than their competition. If you live for turning chaos into momentum and want to help create the defining companies of the next decade, this is your role. High risk. Zero apologies.
Work side-by-side with portfolio founders to scale their companies at speed. Lead talent acquisition for critical roles, build operational systems and processes, shape go-to-market strategy, track key metrics, and support follow-on fundraising.
Skills & Requirements:
4–6+ years of hands-on experience in high-growth startups (previous Head of Operations, Chief of Staff, or founding team member strongly preferred)
Deep understanding of AI, decentralized infrastructure or developer platforms
Strong talent network and proven ability to recruit top technical talent
Exceptional execution skills and comfort operating in ambiguity
Data-oriented and systems thinker
Salary:
$175,000 – $245,000 USD base + significant carry + equity + full benefits
Description:
Sirex.vc doesn't just invest — we build alongside our founders. As Operating Partner, you will be the difference-maker for our portfolio companies, rolling up your sleeves to help them move faster and smarter than their competition. If you live for turning chaos into momentum and want to help create the defining companies of the next decade, this is your role. High risk. Zero apologies.
Payment in Crypto
Sirex
Venture Associate – AI & Decentralized Infrastructure
Full time
Remote
Role:
Source, diligence, and close early-stage investments in AI-native technologies, decentralized protocols, developer platforms, and compute infrastructure. Work side-by-side with founders post-investment on strategy, hiring, product roadmap, and scaling operations.
Skills & Requirements:
2–4 years in venture capital, startup operations, or technical role (engineering/product background strongly preferred)
Deep understanding of AI models, blockchain infrastructure, open-source ecosystems, and compute markets
Proven ability to build founder networks and spot asymmetric opportunities early
Exceptional analytical skills, written/verbal communication, and comfort with high-uncertainty decisions
Self-starter who moves fast and doesn’t need hand-holding
Salary:
$150,000 – $220,000 USD base + meaningful carry + equity upside + full benefits
Description:
Sirex.vc backs visionary founders redefining the open digital economy with asymmetric, high-conviction bets. We move at startup speed and expect the same from our team. As Venture Associate you’ll be on the front lines hunting the next 100x opportunities in AI, crypto infra, and compute — while rolling up your sleeves to help portfolio companies win. High risk. Zero apologies. If you live for the thrill of early-stage tech and want to build the future instead of just funding it, we want to talk.
Source, diligence, and close early-stage investments in AI-native technologies, decentralized protocols, developer platforms, and compute infrastructure. Work side-by-side with founders post-investment on strategy, hiring, product roadmap, and scaling operations.
Skills & Requirements:
2–4 years in venture capital, startup operations, or technical role (engineering/product background strongly preferred)
Deep understanding of AI models, blockchain infrastructure, open-source ecosystems, and compute markets
Proven ability to build founder networks and spot asymmetric opportunities early
Exceptional analytical skills, written/verbal communication, and comfort with high-uncertainty decisions
Self-starter who moves fast and doesn’t need hand-holding
Salary:
$150,000 – $220,000 USD base + meaningful carry + equity upside + full benefits
Description:
Sirex.vc backs visionary founders redefining the open digital economy with asymmetric, high-conviction bets. We move at startup speed and expect the same from our team. As Venture Associate you’ll be on the front lines hunting the next 100x opportunities in AI, crypto infra, and compute — while rolling up your sleeves to help portfolio companies win. High risk. Zero apologies. If you live for the thrill of early-stage tech and want to build the future instead of just funding it, we want to talk.
Payment in Crypto