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1,781 systems software engineer jobs at 717 companies in Norwalk, CT

2mo
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Software Engineer, Build Systems / CI
San Francisco or Seattle or New York City
$185k-$490k/yr OnsiteFull Time
OpenAI
OpenAI: Develops artificial intelligence models and generative AI software services.
5+ YOE5+ years of software engineering experience; building infrastructure or tooling for developers; experience with build systems (Bazel, Buck, Pants, Gradle); scale CI; cross-team collaboration; strong developer experience; distributed systems debugging.
Bazel, Starlark, Buildkite, Python, FastAPI, Kubernetes, Terraform, PostgreSQL, Kafka
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2mo
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Software Engineer - Options Trading Systems
New York, New York, United States
$175k-$250k/yr OnsiteFull Time
Summit Securities Group
Summit Securities Group: A systematic trading firm merging human intuition with machine intelligence.
5+ YOE5+ years in production software engineering; strong C++, systems fluency, networking; low-latency, high-performance focus.
C++, Networking, Socket programming, Multithreading
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1mo
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Senior Software Engineer, Agentic Systems
New York City, New York, United States
$150k-$300k/yr HybridFull Time
Asepha
Asepha: AI-native clinical automation platform for pharmacies.
5+ YOE5+ years software engineering experience with backend focus; proficiency in Python or TypeScript; experience with APIs, data stores, distributed systems, cloud infrastructure, and agentic AI systems.
Python, TypeScript, FastAPI, Flask, Redis, Kafka, SQL, NoSQL, vector databases, Azure, AWS, GCP
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2w
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Software Engineer - Systems
New York City or San Francisco or London
$200k-$275k/yr OnsiteFull Time
Spiral
Spiral: Building high-performance multimodal data infrastructure for AI systems.
5+ YOE5+ years systems programming experience, strong OS foundation, performance engineering, familiarity with Apache Arrow/Parquet/DataFusion/Clickhouse/DuckDB, PyTorch/CUDA understanding, Rust a bonus; able to work onsite in NYC, SF, or London.
Vortex, Apache Arrow, Parquet, DataFusion, Clickhouse, DuckDB, PyTorch, CUDA, Rust
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Staff HPC Systems Software Engineer
New York City or United States
$225k-$275k/yr OnsiteFull Time
Nscale
Nscale: Vertically integrated AI infrastructure provider for high-performance computing.
Extensive experience designing and building Slurm-based HPC systems, strong software skills in Go or Python, deep knowledge of GPU infrastructure and HPC networking (InfiniBand, RoCE, RDMA), and experience integrating HPC with cloud-native platforms.
Slurm, Kubernetes, Go, Python, Kueue, InfiniBand, RoCE, RDMA
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4w
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Software Engineer, Geospatial Systems
Brooklyn, New York, United States
$150k-$220k/yr HybridFull Time
Paces
Paces: Software to accelerate renewable energy and power project development.
4+ YOE4+ years building data-intensive software; strong CS fundamentals; fluency in a systems/backend language; experience with DuckDB/Apache Arrow or comparable columnar systems; emphasis on performance, correctness, and computational geometry.
DuckDB, Apache Arrow, GeoArrow, Clay, Rust, C, C++, Zig, PostGIS, GDAL, GEOS, georust/geo, zarr, GeoZarr
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Software Engineer, Systems ML
Bellevue or Menlo Park or New York
$184k-$257k/yr OnsiteFull Time
Meta
MetaNASDAQ: META: Develops social networking platforms and virtual reality technologies.
8+ YOEBachelor's or equivalent, 8+ years in systems engineering/ML infrastructure, experience with distributed ML training/inference, PyTorch/JAX/TensorFlow, low-level C++/CUDA optimizations, and leading cross-functional ML systems projects.
PyTorch, JAX, TensorFlow, C++, CUDA, MLIR, XLA, TVM, Triton
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1d
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Senior Software Engineer - Backend & Systems
New York City, New York, United States
$180k/yr OnsiteFull Time
Noise Labs
Noise Labs: Platform for trading and measuring cultural attention and trends.
3+ YOE3+ years backend engineering experience; expertise in Rust/Scala/Python/TypeScript, Postgres, distributed systems, Kubernetes, Terraform, observability, and strong system design and testing practices.
Rust, Scala, Python, TypeScript, SQL, Postgres, Postgres RDS, Terraform, Kubernetes, AWS, Nix, Nixpkgs, Tokio, Axum, SQLx, Flink, Kafka, Pandas, NumPy, SciPy, Node.js, REST, gRPC
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1w
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Radar Systems/Software Engineer
Trumbull, Connecticut, United States
$105k-$170k/yr OnsiteFull Time
Technology Service Corporation
Technology Service Corporation: Develops advanced sensor systems and engineering solutions for defense.
5+ YOEB.S. in EE/Physics/CompE (M.S. preferred),5+ years radar and M&S experience,proficient in MATLAB,Python,C/C++,CUDA,VHDL,Windows/Linux,ability to obtain DoD Secret clearance,U.S. citizenship required.
MATLAB, Python, C, C++, CUDA, VHDL, Windows, Linux
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1mo
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Software Engineer, Trading Systems (C++)
New York City, New York, United States
$120k-$285k/yr HybridFull Time
Tower Research Capital
Tower Research Capital: Global quantitative trading firm developing automated algorithmic strategies.
Degree in CS/Engineering/Math/Physics, strong algorithms/data-structures and distributed systems foundation, excellent C++ (Python preferred), experience building low-latency/high-performance systems, interest in financial markets.
C++, Python, Rust, Linux, FPGA
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3mo
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Staff Software Engineer - Systems Intergration
Santa Monica or New York City
$200k-$220k/yr HybridFull Time
Pivotal Health
Pivotal Health: AI platform automating healthcare insurance claim disputes for providers.
7+ YOE7+ years backend software experience; owns architecture; builds ERP/CRM integrations; payments systems knowledge; distributed systems; greenfield work; strong communication.
ERP, CRM, Financial systems, Salesforce, NetSuite, Sage, QuickBooks
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Software Engineer, Revenue Systems
New York City, New York, United States
OnsiteFull Time
Nomic
Nomic: AI platform for architecture, engineering, and construction workflows.
Senior IC with strong systems integration and data modeling; revenue-domain experience; Python/TypeScript production work; correctness-focused.
Python, TypeScript, HubSpot API, REST APIs, Webhooks, SQL
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3mo
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Software Engineer, Streaming Systems
New York or San Francisco
$180k-$320k/yr RemoteFull Time
Hightouch
Hightouch: Syncs customer data from warehouses to business and marketing tools.
Distributed systems and high-scale, real-time streaming experience; ownership mindset; startup environment; knowledge of Kafka/Kinesis/Pulsar is a plus.
Kafka, Kinesis, Pulsar, Warpstream
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1d
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Software Engineer, Developer Infrastructure - Build Systems
New York City or Los Angeles or Austin or Seattle
$130k-$230k/yr OnsiteFull Time
Nominal
Nominal: Software platform for testing and operating complex hardware systems.
4+ YOE4+ years building and maintaining build systems, experience with Bazel and large monorepos, improving CI/CD performance and release reliability, strong engineering judgment.
Bazel, Datadog, Grafana, OpenTelemetry, Kubernetes
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2w
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Senior Software Engineer, Manufacturing Systems
Glen Cove, New York, United States
$180k-$210k/yr HybridFull Time
Standard Bots
Standard Bots: Develops and manufactures AI-powered robotic arms for industrial automation.
5+ YOE5+ years engineering experience; full-stack development with React/Typescript and Node.js/Python; PostgreSQL, GCP/AWS, Kubernetes, Docker; experience designing MRP/MES or production systems preferred.
React, Typescript, Node.js, Python, PostgreSQL, GCP, AWS, GraphQL, REST, Kubernetes, Docker
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3w
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Software Engineer, Design Systems
San Francisco or New York City
$160k-$270k/yr OnsiteFull Time
Assembled
Assembled: A workforce management platform for scaling customer support operations.
3+ YOE3+ years building frontend products, ownership of design systems, deep frontend expertise (TypeScript, component architecture, frontend tooling), strong product/design instincts, and collaboration skills; experience with AI-assisted development preferred.
TypeScript, React, Storybook, visx, D3, Chart.js
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3mo
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Software Engineer, Video Input/Output Systems
New York, New York, United States
$160k-$185k/yr HybridFull Time
Fubo
FuboNYSE: FUBO: Live TV streaming platform with a focus on sports.
3+ YOE3+ years backend software development; Go, Python, or Java; distributed systems; REST APIs; cloud (GCP/AWS); Kubernetes; observability.
Go, Python, Java, REST, SQL, Kubernetes, Terraform, Prometheus, Grafana, AWS, GCP
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3w
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Principal Software Engineer: Distributed Systems (Config, Test, & Deployment)
Austin or New York City or San Francisco or Washington
$200k-$288k/yr HybridFull Time
Cloudflare
CloudflareNYSE: NET: Provides security and performance services for internet properties.
10+ YOE10+ years software engineering experience, technical leadership across orgs, expertise in distributed systems, strong typed language mastery, API design, experience with LLMs, Kubernetes, RocksDB and large-scale systems.
Kubernetes, RocksDB, LLMs, Prodspec and Annealing
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2w
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Software Engineer - Infra & Systems
New York, New York, United States
$144k-$235k/yr HybridFull Time
Astronomer
Astronomer: Managed data orchestration platform powered by Apache Airflow.
0+ YOE0–4 years infra/platform engineering experience; Linux, networking, and at least one language (Python, Go, Bash); exposure to AWS/GCP/Azure or on-prem Kubernetes; Git and testing knowledge; strong written communication.
Terraform, Kubernetes, Golang, TypeScript, Python, Go, Bash, AWS, GCP, Azure, OpenShift, Git, Apache Airflow, Helm, CI/CD, Linux
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3mo
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Software Engineer, Machine Learning (Systems)
New York, New York, United States
$240k/yr OnsiteFull Time
Sweep
Sweep: Providing a cyber-physical defense layer for high-stakes security environments.
5+ YOE5–10 years building and operating production ML systems; strong Python; Go/TypeScript; cross-device and cloud experience; able to debug production systems quickly.
Python, Go, TypeScript, Kafka, LLM, APIs, Pipelines, Data Storage
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