Company: tastytrade Role: Senior Software Engineer (JavaScript) As a Senior Software Engineer, you'll help by modifying existing systems, taking on ownership of current systems as well as green field projects, and troubleshooting issues as they arise. Our engineers work with a variety of tools including C++, Java, JavaScript, and Ruby. You'll work on front-end systems in an effort to expand and improve our product suite.  What you'll do: 

Work on tastytrade's front-end trading client applications using Svelte, though experience with other modern front-end JavaScript frameworks is valuable  Contribute to the Java-based core front-end trading logic library; prior Java experience beneficial but not required  Take ownership over several of tastytrade's client-facing applications or end-to-end systems within client-facing applications  Transform business requirements and technical direction into production-quality code  Collaborate with UX and Product teams to improve customer workflows and overall user experience  Provide technical leadership for junior team members through small project team management and individualized technical mentorship  Deliver concise, constructive peer reviews covering codecraft, implementation quality, and business domain correctness for both junior and senior engineers  Create proof-of-concept implementations that leverage new technologies or novel architectures to establish pathways for future projects  Scale existing technology through architecture profiling, code refactoring, and strategic collaboration with technical leadership and other teams  Write comprehensive tests for your code  Support application development with necessary infrastructure work, coordinating with the infrastructure team as needed 

Who you are: 

The ability to learn quickly in areas in which you don't already have deep expertise  A mastery of modern web development (JavaScript / Typescript, HTML, and CSS) and the ability/willingness to deploy and manage production applications  The ability to jump into a brand-new framework or language and quickly become productive in it  Confident in ability to write tests and quickly deliver stable and performant software  5+ years of professional experience working as a software engineer on a team, preferably with some experience as a technical lead or mentor  A keen eye for user experience and design

Team Perks: 

Performance Bonuses    Stock Purchase Options  Medical/Dental/Vision Benefits  Annual educational / conference stipend  Sustainable workday with minimal on-call responsibilities  401k Plan    20 Paid Vacation Days (plus an additional paid vacation day the month of your birthday!)    10 Paid Sick Days    Gym Membership Reimbursement    Commuter Benefits    Pet Insurance    Wellness & Mental Health Programs    Charitable Donation Matching    Two Paid Volunteer Days Off    Daily catered lunch when in the office    Full kitchen with snacks and beverages    In-building gym    Shuttle to/from Metra    Office located in the West Loop - Chicago's growing center of tech, great cuisine, and high-end bars  

Salary Range: $156,672 - $182,272 The actual salary offered will be based on the candidate's level of experience and qualifications  About Us: The tasty house of brands empowers individual traders differently. tastylive, founded in 2011, is an online financial media network, tastytrade (previously known as tastyworks) is a self-directed retail brokerage firm that launched in 2017, tasty Software Solutions and tastyfx, is a registered Forex broker-dealer. In 2021, London-based IG Group acquired tastylive, Inc. (previously known as tastytrade) and assigned it to lead business in North America. tastyfx is the fastest-growing forex broker in the US over the past few years. Changing the IG US name to tastyfx marks the next chapter, in aligning with the tasty brand family and offering a more forex-focused experience. This combined team has years of experience like institutional brokers, but also a passion for disrupting the entire trading industry.  Our dream is simple: we want more people to find more success with a better trading experience. That’s why we’re investing heavily in the right people, technology, and media to make that happen in the US and across the globe.  Location: Our office is in the West Loop - Chicago's growing center of tech, great cuisine, and high-end bars.  tastytrade | tastylive | tastyfx | tastycrypto 1330 W Fulton Market, Chicago, IL 60607  *Don't meet every single requirement? Studies have shown that women and people of color are less likely to apply to jobs unless they have every single qualification. Our team is dedicated to building a diverse, inclusive, and authentic workplace, so if you’re excited about this role but your experience doesn't align perfectly, we encourage you to apply anyway. You may be just the right candidate for this or other roles!  

Apply Now:

About Aztec At Aztec, our goal is to add privacy to Ethereum. In the current public blockchain paradigm, users and entities unknowingly broadcast data in the public, compromising privacy and security to get trustlessness. Not only are unencrypted blockchains inherently privacy-exposing, they require significant redundancy to compute and verify the legitimacy of transactions. Implementing scalable encryption in a public blockchain paradigm requires cutting-edge math and engineering. Thankfully, our team of scientists and engineers invented Plonk, the industry-standard zkSNARK, and Noir, the universal language of zero knowledge. Now, we’re building a first of its kind Layer 2 with private smart contracts. This requires new cryptographic primitives, a zero-knowledge DSL for writing contracts, a privacy-friendly execution environment, a carefully designed set of circuits that prove the validity of the chain to L1, a decentralized block-building and proving mechanism, and a top-tier user and developer experience. And it’s now time to bring it to market. We’ve raised $125 million from industry-leading investors including a16z crypto, Paradigm, Variant, Consensys, and a_capital, and we’re growing quickly.Role Overview As a Front-End Software Engineer at Aztec Labs, you’ll be at the forefront of designing and developing intuitive, high-performance user interfaces for developers and users interacting with our zkApps, wallets, and protocol tools. You will collaborate with design, cryptography, and protocol teams to ensure seamless and secure user experiences in a highly technical, fast-paced environment. This is a unique opportunity to help define the UX of privacy in Web3 and shape how users interact with next-gen decentralized systems. Key Responsibilities

Design, implement, and maintain front-end applications for zk-powered tools and dApps. Initial projects in the first months will be designing and developing the frontends for our showcase payment dApp and sequencer staking bootstrap projects, critical for our mainnet launch this year. Work closely with product managers to align UI/UX with product requirements. Work closely with engineers to integrate aztec.js into the apps and provide critical feedback. Create and translate design mockups and wireframes into pixel-perfect, responsive interfaces. Write modular, testable, and maintainable code using modern JavaScript frameworks. Contribute to UI/UX discussions and drive decisions around user experience best practices. Ensure performance, security, and scalability of all front-end applications.

Required Qualifications

3+ years of experience building production-grade front-end applications. Strong proficiency in TypeScript, JavaScript, React or Svelte, and HTML/CSS. A deep understanding of frontend performance optimization, accessibility, and responsive design. A focused, and minimalist approach to engineering and design, avoiding bloat, and keeping the code easy for everyone to maintain. Strong communication and collaboration skills. You will be expected to develop a deep understanding of the requirements, and can then take the initiative to meet them with minimal management. Passion for blockchain technology and a strong desire to build user-first Web3 applications.

Nice to Have

Experience working with Web3 libraries (e.g., ethers.js, viem, wagmi). Familiarity with zero-knowledge proofs, privacy-preserving technologies, or blockchain protocols. Previous contributions to crypto wallets, block explorers, or dApp front-ends. Understanding of UX design principles and familiarity with Figma or design systems. Experience with end-to-end testing frameworks (e.g., Cypress, Playwright). Exposure to Layer 2 solutions and Ethereum development tools.

What we offer:

A highly competitive compensation package (including equity) Flexible and remote work environment based out of London 25 days holiday + bank holidays annually An opportunity to work at the cutting edge of blockchain with a world class cryptography and engineering team Aztec Labs is an equal opportunity employer and we value creativity, diversity, and intellectual curiosity. If you're passionate about leveraging your creative talents to make a real-world impact, and if you want to be part of a team that's shaping the future of digital privacy, then we would love to hear from you.

Apply Now: