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Sixtyfour · 1 month ago

Software Engineer - Full-Stack

United States

Full-time

Remote

New Grad, Entry Level

$100K/yr - $200K/yr

Sixtyfour is a data orchestration engine for company and people data, and they are seeking a Full-Stack Software Engineer to build polished product experiences and design backend APIs. The role involves deploying data pipelines, maintaining high reliability and performance, and ensuring customer-focused product decisions.

Artificial Intelligence (AI)Market ResearchSales

No H1B

Responsibilities

Build polished, fast product experiences in Next.js + TypeScript (design-quality UI, accessible components, responsive layouts)

Design clean backend contracts and APIs (FastAPI/Python) for workflows, jobs, billing, and auth

Evolve our workflow engine (DAG/state machine): scheduling, retries/idempotency, rate limits, progress tracking, logs, and user-visible run history

Ship data pipelines and background workers (Celery/queues), with strong observability and alerting

Deploy the stack on AWS + Docker (ECS/EKS or similar), with caching (Redis), pagination, backpressure, and cost controls

Implement product features end-to-end: DB schema → API → UI, including tests and telemetry

Maintain a high bar for reliability, performance, and UX; instrument everything

Be very customer-focused on how certain product decisions impact end customers

Qualification

PythonNext.jsDockerAWSPostgresRedisFastAPICeleryGraphQLWebSockets

Required

Strong backend skills in Python (FastAPI preferred): API design, testing, error handling, schema/versioning

Good design taste is a must

Experience deploying/operating with Docker and a major cloud (AWS preferred: ECS/EKS/Lambda, SQS, CloudWatch)

Comfortable with Postgres (or MySQL) schema design and Redis (caching, rate limiting, locks)

Performance mindset: RSC/Server Actions, data-fetching patterns, bundle/TTFB tuning, DB query perf

Production observability: logs, traces, metrics (e.g., Langfuse, OpenTelemetry, Sentry), and on-call pragmatism

Solid security hygiene (PII handling, secrets, JWT/session auth, CSRF/CORS, least-privilege access)

Preferred

Next.js App Router, RSC, Server Actions, edge/runtime primitives (Vercel/AWS CloudFront)

Prisma/Drizzle; tRPC or GraphQL; Zod/JSON schema; feature flags/experimentation

Realtime UX (WebSockets/SSE), optimistic updates, background revalidation

Celery/RQ, event sourcing, or state-machine libs (e.g., Temporal, Dagster, Prefect, XState)

Testing: Playwright (e2e), Vitest/Jest, pytest; accessibility checks

Company

Sixtyfour

Sixtyfour is a AI based reasech service company that automates to enrich specialized professionals, company data, and insights.

Founded in 2025

San Francisco, California, USA

2-10 employees

https://www.sixtyfour.ai

Funding

Current Stage

Early Stage

Total Funding

$0.5M

Key Investors

Y Combinator

2025-04-02Pre Seed· $0.5M

Leadership Team

Saarth Shah

Co-Founder & CEO

Company data provided by crunchbase