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Software Engineer

kastel group • United State
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AI Summary

Join a fast-growing technology company as a Software Engineer to build critical infrastructure powering a massive industry. Design and build scalable backend services and APIs, develop integrations with complex third-party and legacy systems, and work on real-time data synchronization and infrastructure challenges. Strong backend and/or full-stack engineering background required.

Key Highlights
Build scalable backend services and APIs
Develop integrations with complex third-party and legacy systems
Work on real-time data synchronization and infrastructure challenges
Key Responsibilities
Design and build scalable backend services and APIs
Develop integrations with complex third-party and legacy systems
Work on real-time data synchronization and infrastructure challenges
Technical Skills Required
Cloud Infrastructure Distributed Systems SQL
Benefits & Perks
Base Salary: $120,000–$200,000
Meaningful equity package
Visa sponsorship available
Nice to Have
JavaScript
React
Next.js

Job Description



About the Company



A fast-growing, venture-backed technology company is seeking an exceptional early-career Software Engineer to help build critical infrastructure powering a massive, underserved industry. This is an opportunity to join a profitable startup with strong product-market fit, hundreds of paying customers, and significant growth momentum.



About the Role



The company is building core data infrastructure that connects fragmented legacy systems and enables real-time synchronization of critical business information. Engineers work on complex backend challenges involving distributed systems, third-party integrations, cloud infrastructure, and high-scale data processing. This role offers significant ownership and direct impact on products that customers rely on every day. You'll work alongside a small, highly technical team where engineers influence architecture, product direction, and engineering culture.



Responsibilities



  • Design and build scalable backend services and APIs
  • Develop integrations with complex third-party and legacy systems
  • Work on real-time data synchronization and infrastructure challenges
  • Build and maintain cloud-native systems and services
  • Collaborate closely with product and engineering leadership
  • Contribute to architectural decisions and technical strategy
  • Help shape engineering best practices within a growing team



Qualifications



  • 0–4 years of software engineering experience
  • Strong backend and/or full-stack engineering background
  • Experience working independently with minimal oversight
  • Hands-on experience with cloud infrastructure (AWS preferred)
  • Computer Science degree from a highly regarded U.S. or Canadian university, or equivalent demonstrated technical excellence
  • Strong software engineering fundamentals and problem-solving skills



Required Skills



  • Experience at early-stage startups (Seed through Series B)
  • Exposure to high-scale backend systems and distributed architectures
  • Track record of excellence through academics, internships, startup achievements, competitive programs, or other notable accomplishments
  • Strong ownership mentality with a bias toward execution
  • Low-ego, collaborative approach to problem-solving



Preferred Skills



  • Enjoys solving difficult technical problems
  • Excited by fast-paced startup environments
  • Motivated by building foundational infrastructure
  • Thrives in high-autonomy environments
  • Interested in long-term company building and engineering culture



Pay range and compensation package



Base Salary: $120,000–$200,000



Meaningful equity package



Visa sponsorship available for qualified candidates



Full-time employment



Equal Opportunity Statement



Successful candidates will typically come from strong CS programs in the U.S. or Canada, high-performing startups, notable internship/co-op programs, technical founder backgrounds, and engineers with demonstrated excellence early in their careers.



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