• Lead the design and development of full-stack solutions, with emphasis on event-driven microservices, APIs, and data platforms • Drive iterative modernization by decomposing monoliths into shared, modular services • Build reusable capabilities aligned with product-centric domain models • Contribute to agentic architectures and intelligent automation that power seamless user experiences • Collaborate with cross-functional teams to deliver measurable business outcomes, not just features • Mentor junior developers and promote best engineering practices

Fullstack Developer (Ruby on Rails + React) Location: Remote (LATAM, Europe, or Canada) Compensation: Up to USD48/hour (contract) Engagement: Full-time contractor About our Client Our client is a fast-growing technology company building data-driven financial solutions that simplify and optimize business operations. We develop secure, scalable systems that empower financial teams to work smarter — leveraging automation, transparency, and real-time data insights. We’re now looking for a Fullstack Developer with a strong backend focus to join our distributed engineering team. You’ll work on the core architecture that powers our platform, helping to scale our microservices and integrate modern financial technologies. What You’ll Do Build and maintain backend services and APIs using Ruby on Rails , integrated with React frontends. Design and implement microservices architectures that ensure scalability and reliability. Collaborate with product and data teams to integrate financial workflows and data pipelines. Optimize system performance, ensure code quality, and maintain robust testing practices. Contribute to architectural discussions and guide decisions around scalability and security. What We’re Looking For Must-Have Skills 5+ years of experience in fullstack development. Advanced proficiency in Ruby on Rails and React.js . Strong focus on backend systems , APIs, and microservices. Experience with relational databases (e.g., PostgreSQL, MySQL). Excellent understanding of version control (Git) and CI/CD best practices. Fluent English communication (written and spoken). Nice-to-Have Background in finance, fintech, or data-heavy products . Experience with containerization (Docker, Kubernetes). Familiarity with cloud platforms (AWS, GCP, or Azure). Prior work in a remote, distributed team environment. Why Join Competitive hourly rate (up to USD48/hr ). Work fully remote from LATAM, Europe, or Canada . High-impact environment where your code directly improves financial workflows. Collaborative, product-driven culture with strong engineering ownership. Interested? Apply now or reach out to our team directly — we’d love to learn more about your background and share details about the project.

COMPANY At 0x, our mission is to "Create a Tokenized World Where All Forms of Value Can Flow Freely". We deliver this to web3 builders with a delightfully simple suite of developer APIs that provide faster trading, better prices, and superior user experience. Founded in 2017, we’ve processed over 211M+ transactions and $180B+ in trading volume from users trading on Matcha, Coinbase Wallet, Robinhood Wallet, Phantom, Rainbow, DefiLlama, MetaMask, Zerion, Zapper, and many more. Our investors include Greylock Partners, Pantera Capital, and Jump Crypto. When you join 0x, you’ll become part of a veteran team of crypto builders who know the importance of code quality, team cohesion, and a culture of learning. Matcha is a DEX aggregator, built by 0x. With over 5 million tokens indexed across 9 blockchains, the decentralized exchange provides aggregated liquidity from +100 sources and the most efficient trade execution through smart routing. Matcha offers swaps, limit orders and cross chain trades, having enabled over $62B volume and 3.5M+ trades as the first consumer-facing product by the 0x team. 0x platform is developers' one-stop shop to build financial products on crypto rails. 0x empowers hundreds of teams and developers with essential web3 tools to enable faster trading, better prices and superior UX. Our suite of APIs has processed over 60M+ million transactions and $133B+ in volume from more than 6 million users trading on apps like Coinbase Wallet, Robinhood Wallet, Metamask, Zerion, Zapper, and more. Matcha API Tech Stack We care far more that someone has solid fundamentals, strong learning agility, and is an overall good human. That said, we’re excited about the rapidly evolving tech we’re building on. It includes: TypeScript + Node/Express (core stack) Rust AWS Cloud Services (Kubernetes, Kafka, Postgres, Redis, OpenSearch, etc) Grafana LGTM Observability Stack Next.js Responsibilities - Your Mission Be an individual contributor on projects as well as lead technical projects of moderate to high complexity Offer valuable insights as a peer when reviewing designs and performing code reviews Create high quality, secure, clean code Improve the way we build and deliver software Consistently ship Coach and mentor other engineers and generally up-level the team Empathize with our customers and users Requirements - Who you are Benefits The base salary range for this position is $95,000 - $230,000 + equity + ZRX tokens + benefits. Within the range, individual pay is determined by job-related skills, experience, location, business needs, and candidate preferences between the different compensation elements. Comprehensive insurance (medical/dental/vision/life/disability) for U.S.-based employees — 100% of base plan covered for you and dependents 401k and FSA for U.S.-based employees Monthly mobile phone bill, wellness, and pre-tax transportation expense Covered mental health benefits (included professional therapy sessions) A supportive remote environment Lunch reimbursement for all employees across the globe! Stipend for your ideal remote / WFH set-up: headphones, and any other work gear you may need 12-week paid parental leave Great office conveniently located in the SF Financial District for those in the region! Flexible vacation: Take time when you need it (and we really mean it!) 0x and its associated entities are dedicated to fostering diversity, inclusion, and belonging in its teams and workforce, and are proud to be equal opportunity employers. 0x does not make employment or hiring decisions on the basis of race, color, creed, religion, sex (including those who are pregnant or have given birth), sexual orientation, gender, gender expression or identity, age, disability, medical condition, genetic information, military or veteran status, marital status, pregnancy, citizenship, national origin, immigration or citizenship status, political affiliation, or any other basis that is protected by applicable local, state, or federal laws. This includes not making such decisions based on the status itself, as well as any associations, perceptions, and assumptions made regarding these statuses. 0x will also consider qualified applicants with arrest and conviction records in a way that is consistent with San Francisco’s Fair Chance Ordinance and similar local laws. Our commitment to equal employment opportunity extends to ensuring that all applicants and employees can perform to their fullest potential, including through obtaining reasonable accommodations when necessary.

SigNoz is a global open source project with users in 30+ countries. We are building an open-source application monitoring which helps developers monitor their applications and troubleshoot problems, quickly. We have crossed 23000+ Github stars , 6000+ members in the slack community and 150+ contributors. Why us? Opportunity to work in a global dev infra product Work on an open source product. Engage with the community. Evangelise the product. Backed by YC and some of the prominent VCs in the US. Fully Remote Who would be a good fit 1+ yrs experience as a software engineer. Can get your hand dirty in codes in different languages and deployment methods (think k8s, docker). Not necessary to have deep knowledge, but enough to set up some sample apps Active in dev communities like Github or different dev focused slack communities. Open source contributions are a big plus. Understanding of cloud native ecosystem, kubernetes, OpenTelemetry (plus) Curious and having a get stuff done attitude Interest in startups. If you are an ex-entrepreneur, we would love to chat with you What you will be working on Create dev focused blogs or videos, speak at dev-facing conferences Organize meetup / present in meetups & conferences about SigNoz Help users out in setting up SigNoz and understand their usecases Engage in online dev communities and present the product in online/in-person meetups