Top 3 reasons to join us

• Competitive salary packages.
• Dynamic and open-sharing working environment.
• Hybrid and flexible working mode.

Job description

Build like a founder. Ship like Spartan.

Our customers are scaling fast - and so are we. That’s why we’re looking for a Backend Engineer to join our world-class team.

At Spartan, we don’t act like vendors. We embed with startups backed by YC, Pear VC, BlingCap ,a16z, Techstars, and more — partnering with founders and engineers from Stanford, MIT, Yale, Google, Amazon, Uber, and beyond. Together, we help launch MVPs in 30 days and scale systems that power billions of requests.

This isn’t “just another software engineer role.” It’s a chance to work shoulder-to-shoulder with elite builders, solve complex startup challenges, and see your code directly drive companies raising millions on the global stage.

You’ll also be working at the frontier of AI: 70% of our portfolio today is LLM-powered. Our engineers leverage the latest tools like Cursor, Claude, and Codex to move faster, write cleaner code, and solve harder problems.

What You’ll Do

• Contribute to real production projects for US-based startups.
• Learn and build in one or more areas:
  • Backend (APIs, databases, cloud infra, distributed systems)
  • Frontend (React, TypeScript, Next.js, UI/UX)
  • AI/LLM (RAG pipelines, vector DBs, evals, guardrails)
  • DevOps/Infra (CI/CD, Kubernetes, observability)
• Ship features end-to-end with mentorship from senior Spartan engineers.
• Participate in our proven process: async standups, PRDs/RFCs, code reviews, testing.
• Experiment with AI-native tooling (Cursor, Claude, Codex) to boost your workflow.

Your skills and experience

What We’re Looking For

• Strong English communication - you’ll collaborate directly with US-based teams.
• Strong ownership mindset - proactive, takes initiative, and follows through on tasks. 
• Curiosity and eagerness to learn fast — a builder’s mindset.
• Solid foundation in at least one area: algorithms, data structures, databases, or web dev.
• Familiarity with modern programming languages (TypeScript, Python, Go, Java/Kotlin, etc.).
• Pursuing a degree in Computer Science (or equivalent) OR recent graduate.

Tech You’ll Touch (depending on your track)

• Go • Java/Kotlin/Scala • TypeScript • Python •
• Postgres • MongoDB • DynamoDB • ElasticSearch • Redis
• Pinecone • Qdrant • pgvector
• Kafka • Pulsar • SQS • AWS Kinesis • GCP Cloud Tasks
• AWS • GCP • Azure • Kubernetes (k8s)
• Spark • Flink
• Jenkins • GitHub Actions
• DataDog • Prometheus • Grafana • ELK Stack (Elasticsearch, Logstash, Kibana)

Why you'll love working here

Perks & Benefits

• 💻 Real startup experience - not classroom projects
• 🧑‍🏫 Mentorship from engineers who’ve scaled companies from 0 → IPO
• 🌍 Exposure to top-tier US startups (YC, a16z, Techstars, Pear VC)
• 🏝 Flexible hours + hybrid style
• 🎉 Team events and Spartan culture (monthly parties, annual trip)
• 🚀 Potential return offer for top performers

Career Growth

• Work with founders from Stanford, MIT, Yale, Google, Amazon, Uber, and more.
• Exposure to cutting-edge tech (LLMs, AI agents, cloud infra, real-time systems).
• Transparent career path and mentorship from engineers who’ve taken 3 companies to IPO.
• Solve real startup challenges — every project feels like its own mini-startup.

Why Spartan

• 50+ MVPs launched, 3 IPOs, $100M+ raised.
• 95% engineer retention — because we hire the top 1%.
• You’ll never just “take tickets” here. You’ll own problems, ship fast, and grow with the founders we partner with.