Senior Software Engineer - GoUSD
BitGo is a prominent infrastructure provider in the digital asset solutions space, offering custody, wallets, staking, trading, financing, and settlement services from regulated cold storage. Since its establishment in 2013, the company has been dedicated to enabling clients to securely navigate the digital asset landscape. With a wide global presence and multiple Trust companies, BitGo caters to numerous institutions, including renowned brands, exchanges, platforms, and millions of retail investors around the world. Serving as a crucial foundation in the digital economy, BitGo manages a substantial portion of Bitcoin network transactions and stands as the largest independent digital asset custodian and staking provider globally.
This position necessitates full-time onsite presence at the New York office to foster collaborative team dynamics and innovative problem-solving.
BitGo is seeking an experienced Software Engineer to join its Fiat Team.
Skills & Experience:
Required:
- A minimum of 6 years of demonstrated backend and server-side development experience
- Proficiency in algorithm design, problem solving, and complexity analysis
- Strong background in technical system design spanning various functional teams
- Expertise in Elixir, Phoenix, LiveView, and PostgreSQL
- Knowledge in RESTful API design
- Experience with microservices and service-oriented architectures
- Familiarity with unit and functional testing, as well as debugging
- Proficiency in Git/GitHub, branching methodologies, code review tools, CI tools, etc.
- Ability to adapt quickly in a fast-paced environment
- Bachelor’s degree in computer science, applied mathematics, or a related technical field from a reputable university
- Understanding of and keen interest in cryptocurrencies and blockchain
Preferred:
- Exposure to Ash framework
- Proficiency in TypeScript, Node.js, Express, and MongoDB
- Experience in developing consumer-facing crypto products
- Track record in building public-facing APIs and/or workflow applications in a production setting
- Previous work on interactive UIs with LiveView or React
- Experience collaborating with clients and/or business partners
- Knowledge of digital wallets, clearing and settlement, lending, trading, accounting systems, etc
Why Join BitGo?
Disrupting an industry necessitates vision, innovation, passion, technical skills, determination, collaboration, and execution. Collaborate with a team of exceptional individuals who pursue excellence and embody the corporate values of ownership, craftsmanship, and transparent communication. BitGo is in search of new team members who bring fresh perspectives and problem-solving skills, and who are poised to be part of a team that revolutionizes the world’s financial markets.
Benefits of working at BitGo:
- Competitive base salary, bonus, and stock options
- 100% company-paid health insurance for employee, partner, and dependents
- Up to 4% 401k company match
- Paid parental leave, vacation
- Complimentary custom lunches, dinners, and snacks
- Provision of computer equipment and workplace furniture tailored to your requirements
- Inspiring startup environment with great colleagues
Pay Transparency Notice: Depending on your level and location, the compensation for this position typically ranges from $165,000 to $210,000 USD base salary. Additionally, equity, an annual performance bonus, and the aforementioned benefits contribute to the overall compensation package for this role.
Cryptocurrencies represent the most disruptive change to the financial services industry in recent years. Join BitGo and be able to look back knowing you were part of the team that revolutionized investing.
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.
Investment Analyst
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.
Operating Partner
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.
Venture Associate – AI & Decentralized Infrastructure
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.