Senior Frontend Engineer, React

4 weeks ago

Boston, United States Jock MKT Full time

At JockMKT (pronounced “Jock Market”), we are building the second-screen experience for live sports with a social, interactive daily fantasy sports (DFS) marketplace where users buy and sell shares of players in real-time with real money. With all shares based on guaranteed payouts, JockMKT has rapidly grown transaction volume and processes millions of dollars of user trades each month.


Since launching in 2020, JockMKT has expanded gameplay from support for the PGA and NFL to the NBA, MLB, NHL, and NASCAR, and released innovative new products for our customers across our mobile apps, web platform, and open REST and websocket-based API. Headquartered in Boston, we embrace workplace flexibility with a hybrid work model and hire remotely across US time zones.


As a small team, we’re constantly pushing ourselves to solve new problems. We primarily develop with Typescript with our type system at the heart of our code base, utilizing Go and Python in specific trading contexts. We are self-starters who are always interested in learning ‘why’ as we encounter new challenges. 

What You'll Do

  • Work with our product and engineering team to develop new user-facing features across our mobile apps and web platform
  • Build reusable components and business logic that drives core user experience
  • Optimize real-time data streaming and state management, proactively diagnosing potential issues and implementing performance improvements
  • Monitor application performance through monitoring and alerting 

Who You Are

  • 4 years of professional software development experience working with Javascript/Typescript and React/React Native or similar frontend development framework (Vue, Native iOS with Objective-C/Swift, Native Android with Java/Kotlin)
  • Experience working with complex front-end requirements, data flow, and state management
  • Professional experience owning a software development process that included shipping a complicated piece of software to real users.
  • Detail oriented, highly organized, and a strong desire to learn and help teammates. 

Our Tech

  • Proprietary exchange/match engine and order system
  • Node, Postgres, and Redis backend with some Go & Python microservices
  • REST and Websocket APIs with a full type system
  • Public trading API
  • React/Next.js and React Native front ends with hooks
  • Redux, Redux Toolkit, and RTKQuery for state storage and data fetching
  • Deployed with AWS ECS & Vercel
  • Github, Slack, Notion, Datadog

What We Offer You

  • Interesting work at the intersection of finance and sports
  • Competitive salary and stock options
  • Health, dental and vision insurance
  • Paid parental leave
  • Flexible Paid Time Off (Suggested 4 weeks)
  • 401k
  • Team events and internal contests with our product
  • Home office stipend
  • Commuter Benefits

We value diversity at Jock MKT and believe the unique contributions of each of us drive our success. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.


Note: We are unable to sponsor work visas at this time. 

  • Staff Frontend Engineer

    3 weeks ago

    Boston, United States Motion Recruitment Full time

    Job Title: Lead Frontend Engineer (React) Location: Boston, MA (Hybrid Work Model) Company Overview: Our client is redefining the eCommerce landscape with our all-in-one platform that equips businesses with the tools they need to analyze and drive their success. Our mission is to create a seamless, data-driven experience that empowers businesses to...

  • Senior Frontend React Engineer

    2 weeks ago

    Boston, United States Motion Recruitment Full time

    Boston, MassachusettsHybridFull Time$160k - $160kMy client offers a pioneering AI startup located in Boston by helping to make medical data clear and understandable. Our purpose is to use AI technology to advance the healthcare field. We are looking for a creative front end developer to join our team. As a frontend react engineer, you will be responsible for...

  • Senior Frontend React Engineer

    4 weeks ago

    Boston, United States Motion Recruitment Full time

    My client offers a pioneering AI startup located in Boston by helping to make medical data clear and understandable. Our purpose is to use AI technology to advance the healthcare field. We are looking for a creative front end developer to join our team. As a frontend react engineer, you will be responsible for help building new features for main data...

  • Staff Frontend Engineer

    1 month ago

    Boston, United States Motion Recruitment Full time

    Job Title: Staff Frontend Engineer Location: Boston About Us: We are at the forefront of artificial intelligence and machine learning, specializing in technologies designed for the financial markets. Our advanced platform uses natural language processing (NLP) and other AI techniques to analyze extensive financial data from diverse sources such as news...

  • Senior Frontend Engineer Opportunity

    3 weeks ago

    Boston, Massachusetts, United States Motion Recruitment Full time

    Join an Award-Winning AI Innovator: Senior Frontend Engineer Opportunity Are you ready to make a difference in the medical field with cutting-edge technology? Our client recently recognized as one of the top 100 AI companies worldwide, is on the lookout for a talented Senior Frontend Engineer to join their dynamic team.About The Company: They are an...

  • Senior Frontend React Engineer

    2 weeks ago

    Boston, MA, United States Motion Recruitment Full time

    Boston, MassachusettsHybridFull Time$160k - $160kMy client offers a pioneering AI startup located in Boston by helping to make medical data clear and understandable. Our purpose is to use AI technology to advance the healthcare field. We are looking for a creative front end developer to join our team. As a frontend react engineer, you will be responsible for...

  • Senior React Engineer

    4 weeks ago

    Boston, United States Motion Recruitment Full time

    We are an innovative generative AI startup based in Boston, pushing the boundaries of artificial intelligence to create transformative solutions for diverse industries. Our mission is to leverage cutting-edge technology to drive unprecedented advancements in AI, and we are looking for a talented Senior React Engineer to join our dynamic team and help us...

  • Senior Frontend Engineer

    1 week ago

    Boston, United States Motion Recruitment Full time

    Job Title: Frontend React and Three.js Engineer Location: Boston, MA About Us: Our client is at the cutting edge of 3D simulation technology, pushing the boundaries of what's possible with immersive digital experiences. Our team is passionate about creating innovative solutions that blend high-fidelity 3D graphics with intuitive user interfaces. We’re...

  • Senior Frontend Engineer

    2 months ago

    Boston, United States Motion Recruitment Full time

    Job Title: Senior Frontend Engineer Company: Join our innovative tech company at the forefront of safety and security solutions. We specialize in next-generation scanning technologies that set new standards in the industry. Our mission is to create safer environments through cutting-edge AI and IoT integration. Location: Boston, MA Position Overview: We are...

  • Senior Frontend Engineer

    2 months ago

    Boston, United States Motion Recruitment Full time

    Job Title: Senior Frontend Engineer Company:Join our innovative tech company at the forefront of safety and security solutions. We specialize in next-generation scanning technologies that set new standards in the industry. Our mission is to create safer environments through cutting-edge AI and IoT integration. Location:Boston, MA Position Overview:We are...

  • Senior Frontend Engineer in AI Technology

    3 days ago

    Boston, Massachusetts, United States Motion Recruitment Full time

    Location: Hybrid role based in Boston, MassachusettsEmployment Type: Full TimeSalary Range: $100k - $200kAre you passionate about transforming the healthcare landscape through advanced technology? Our client, a distinguished startup recognized among the top 100 AI firms globally, is seeking a skilled Senior Frontend Engineer to enhance their dynamic team of...

  • Senior Frontend Engineer in AI Innovation

    1 week ago

    Boston, Massachusetts, United States Motion Recruitment Full time

    Location: Hybrid role based in Boston, Massachusetts.Employment Type: Full TimeSalary Range: $100k - $200kAre you passionate about transforming the medical industry through advanced technology? Our client, a distinguished startup recently acknowledged as one of the leading AI firms globally, is seeking a skilled Senior Frontend Engineer to enhance their team...

  • Senior Frontend Engineer Opportunity

    3 weeks ago

    Boston, United States Motion Recruitment Full time

    Join an Award-Winning AI Innovator: Senior Frontend Engineer Opportunity Are you ready to make a difference in the medical field with cutting-edge technology? Our client recently recognized as one of the top 100 AI companies worldwide, is on the lookout for a talented Senior Frontend Engineer to join their dynamic team. About The Company: They are an...

  • Senior Frontend Engineer, React Native

    3 months ago

    Boston, Massachusetts, United States Jock MKT Full time

    At JockMKT (pronounced "Jock Market"), we are building the second-screen experience for live sports with a social, interactive daily fantasy sports (DFS) marketplace where users buy and sell shares of players in real time with real money. With all shares based on guaranteed payouts, JockMKT has rapidly grown transaction volume and processes millions of...

  • Senior Software Engineer

    2 weeks ago

    Boston, United States Motion Recruitment Full time

    Job Title: Senior Software Engineer (React.js, IoT) Location: Boston, MA Our client is an innovative company at the forefront of technology, specializing in cutting-edge hardware solutions and data analytics platforms. Our mission is to transform how data is leveraged in the IoT space, creating impactful and insightful analytics that drive smart...

  • Senior Frontend Engineer in AI Innovation

    3 days ago

    Boston, Massachusetts, United States Motion Recruitment Full time

    Location:This position offers a hybrid work model, allowing flexibility between remote and on-site work arrangements.Compensation:Competitive salary range of $100k - $200k, reflecting the importance of attracting top-tier talent.About The Company:Our client is a pioneering startup, recently highlighted in major publications for their innovative contributions...

  • Senior Frontend Engineer Opportunity

    2 weeks ago

    Boston, MA, United States Motion Recruitment Full time

    Boston, MassachusettsHybridFull Time$150k - $200kJoin an Award-Winning AI Innovator: Senior Frontend Engineer OpportunityAre you ready to make a difference in the medical field with cutting-edge technology? Our client recently recognized as one of the top 100 AI companies worldwide, is on the lookout for a talented Senior Frontend Engineer to join their...

  • Frontend Engineer

    1 month ago

    Boston, Massachusetts, United States Motion Recruitment Full time

    Job Title: Frontend AI Software Engineer (React, TypeScript, ) Company Overview: Join the forefront of AI innovation in the vibrant tech hub of Boston. We are trailblazers in revolutionizing AI applications, leveraging cutting-edge technology to redefine industries and drive unprecedented advancements. As a rapidly growing company, we thrive on pushing the...

  • Award-Winning AI Innovator: Senior Frontend Engineer Opportunity

    1 month ago

    Boston, United States Motion Recruitment Full time

    Are you ready to make a difference in the medical field with cutting-edge technology? Our client, recently recognized as one of the top 100 AI companies worldwide, is on the lookout for a talented Senior Frontend Engineer to join their team of incredible engineers. About The Company: They are an innovative startup, recently featured in Forbes and valued at...

  • Award-Winning AI Innovator: Senior Frontend Engineer Opportunity

    3 hours ago

    Boston, United States Motion Recruitment Full time

    Boston, MassachusettsHybridFull Time$100k - $200kAre you ready to make a difference in the medical field with cutting-edge technology? Our client, recently recognized as one of the top 100 AI companies worldwide, is on the lookout for a talented Senior Frontend Engineer to join their team of incredible engineers. About The Company: They are an innovative...