Senior Software Engineer - Custody Services
Status
San Francisco, USA
Full time
Office
Compensation is not specified
Role
Software Engineer
Description
BitGo is the leading digital asset solutions provider, offering custody, wallets, staking, trading, financing, and settlement services from regulated cold storage. Since its establishment in 2013, BitGo has focused on enabling clients to securely navigate the digital asset space globally. Serving thousands of institutions, including top industry brands, exchanges, platforms, and millions of retail investors, BitGo plays a key role in the digital economy. The company handles a significant portion of Bitcoin network transactions, being the largest independent digital asset custodian and staking provider worldwide.
BitGo is seeking a Senior Software Engineer to join the Custody Services team, focusing on building a custodial platform for businesses and customers to trade, stake, and manage crypto products optimally.
Responsibilities:
- Design and develop scalable, well-abstracted, and robust APIs, libraries, and services for the custodial platform.
- Take ownership of functionality and scalability features from inception through deployment and integration with customers.
- Document and expose functionality to UI, third-party developers, and internal and external tooling.
- Collaborate with cross-functional teams to define, design, and implement new features.
- Write clean, efficient, and maintainable code.
- Ensure high performance, quality, and responsiveness of applications.
- Identify and resolve bottlenecks and bugs.
- Stay updated on new technologies to enhance development efficiency.
- Engage in code reviews and contribute to continuous improvement.
- Mentor peers in the engineering team through code reviews and sharing best practices. Skills & Experience:
Required:***
- 5+ years of experience in backend and server-side development.
- Skilled in algorithm design, problem-solving, and complexity analysis.
- Proficient in TypeScript, Node.js, and Kotlin.
- Experienced in PostgreSQL and MongoDB.
- Competent in RESTful API design.
- Familiar with microservices and service-oriented architectures.
- Knowledge of unit testing, functional testing, and debugging.
- Expertise in Git/GitHub, branching methodologies, and CI tools.
- Bachelor's degree in computer science, applied mathematics, or a related field from a reputable university.
- Strong interest in cryptocurrencies and blockchain.
Preferred:
- Experience in developing consumer-facing crypto products.
- Demonstrated success in building public-facing APIs in production.
- Ability to work full-stack with familiarity in React.
- Experience collaborating with clients and business partners.
- Familiarity with digital wallets, clearing and settlement, lending, trading, and accounting systems.
Why Join BitGo?
Join a team of driven individuals who embody BitGo's core values of ownership, craftsmanship, and open communication. Contribute your innovative ideas and problem-solving skills to disrupt the financial markets. BitGo offers competitive salary, bonuses, stock options, excellent benefits, and an inspiring startup environment. Grasp the opportunity to be part of the team transforming investing through cryptocurrencies.
Skills Required
BitGo
Website
www.bitgo.comCompany size
Not specified
Location
United States
Description
Not specified
Status
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
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