Senior Software Engineer Jobs

Coder is an AI software development company building an Agentic Development Environment (ADE) for deploying autonomous coding agents alongside human developers. The platform is self-hosted, policy-driven, and focuses on security, governance, auditab…

We build AI phone agents for US healthcare — insurance claims, benefit verification, scheduling. 300K+ calls/month. Series A closed, R&D fully in Barcelona. Stack: Python, FastAPI, React/TypeScript. Small engineering team, fast pace, real ownership.…

Category Labs (formerly Monad Labs) is a team of systems engineers and researchers building step-function improvements in decentralized blockchain technology. After raising $225M in Series A funding led by Paradigm, they are hiring for roles includi…

We are building at the intersection of AI and human behavior — behavioral intelligence at scale. Platform uses LLMs and proprietary data pipelines to evaluate trust, identity, and reputation. Launching to mass consumer market this year. Team from Go…

Fullstory provides privacy-preserving session replay and analytics for web and mobile. Multiple engineering roles are open in Atlanta (semi-onsite, 1 day/week), Bogotá, and London, with some Remote (US) options. Listings include senior engineering r…

Cassidy is an AI agent and automation platform for non-technical knowledge workers. Series A company (~25 people) hiring onsite in New York City. Roles open: Senior and Mid-level Software Engineers focused on end-to-end product engineering and build…

Freeform builds AI-native manufacturing systems that unify software, hardware, and physics to produce industrial-scale parts at the speed of human ideation. By treating manufacturing as a single integrated system, the company aims to revolutionize i…

Thirdfort is a Series A startup in London building a Client Due Diligence Platform to prevent fraud and money laundering. They have rebuilt their product and are leaning into AI across the system. Engineers are expected to contribute to product desi…

Zigment is a customer journey platform that makes it simple to build AI agents for enterprises. Small, lean tech team focused on building reliable and scalable AI systems, with access to the latest AI coding and productivity tools. Open roles: Softw…

AI + Cybersecurity company hiring engineers to build AI platform and pipelines, working closely with applied AI scientists. Onsite roles in San Jose, CA. Open roles include Principal Software Engineer (AI Platform), Senior Software Engineer (AI Plat…

CivAI is a non-profit that educates policymakers and the public about AI risks using live software demonstrations. As a software engineer, you will be responsible for conceiving of, and building end-to-end, the software demonstrations that are the c…

We are a VC-funded startup (recently raised $51M Series C) building an infrastructure orchestrator and collaborative management platform for Infrastructure-as-Code (OpenTofu, Terraform, Terragrunt, CloudFormation, Pulumi, Kubernetes, Ansible). Backe…

The AMF works to fight malaria in an extremely cost effective way with insecticide treated bed-nets. Every year hundreds of millions of people will be infected with malaria, and half a million of them will die, with many more being debilitated or di…

Fast-growing profitable SaaS that helps stores sell Pokemon cards and other trading card games. Two onsite positions in Burlingame, CA: Senior Software Engineer (Full-Time, $100k–$150k) and Customer Service Rep (Full-Time, $40k–$55k).

Ping Data Intelligence (Miami, FL) is hiring a Senior Software Engineer to work onsite in Delhi, India. The role involves working alongside the data entry team to increase efficiency, streamline processes through ML and UI improvements, and triage a…

Vantage is a FinOps / Cloud Cost Management platform (Series A) used by 15,000+ organizations. Hiring Senior/Staff Software Engineers for NYC and US-remote. Ruby on Rails shop focused on infrastructure and cloud cost management, with projects in AI/…

Lantern builds AI-powered revenue intelligence and agentic systems. Senior Software Engineer will own complex technical problems end-to-end, translate customer needs into scalable architecture, optimize AI model efficiency (including prompt engineer…

We are building an AI platform for credit unions. A variety of tools (third party integrations + RAG) backed by multiple LLM options, including OLMo, running in our own AWS infrastructure. Small team (CTO is the poster and the first technical hire) …

Lead design and development of Bloomberg's next-generation authentication and MFA systems. Modernize and unify authentication infrastructure to provide fast, resilient, highly available identity solutions across web, API, and proprietary technologie…

We9re building the AI-powered platform for enterprise data. Automatically analyse data quality, automatically fix and enhance data, and prevent bad data. Our platform automatically detects issues in master and transactional data, generates improvem…

Join builds collaboration software for the construction industry — helping contractors, owners, and architects coordinate on high-value projects. We are hiring multiple senior/staff engineers across frontend-heavy, fullstack, and backend-heavy profi…

Arcol (arcol.io) is a small, high talent density team building the future of building design — a future that's collaborative, fast, and intuitive. We're a web-native, fully collaborative 3D design tool modernizing the experience of architectural des…

WorkWhile is an ML-powered labor marketplace helping hourly workers find better-paying, more predictable work. The company uses demand forecasting, real-time skill-based worker shift matching, dynamic pricing and other features to address staffing i…

Hover | https://hover.to | San Francisco, CA | ONSITE | Full-time. Roles: - Software Engineer, 3D Modeling - Senior Software Engineer, 3D Modeling. The TL;DR: We are writing software that generates 3D models of buildings. Homeowners, contractors, an…

Hike Medical | Boston or San Francisco (ONSITE) | Senior+ Software Engineer Hike Medical is reinventing musculoskeletal care, starting with feet. Our proprietary AI-vision platform turns a 30 second web-based (no sensors) foot scan into precision e…

Join us in pioneering the next generation of nuclear reactors! You'll leverage your software skills alongside nuclear engineers to model, simulate, design, and deploy advanced fission power technology. You will work at the forefront of the nuclear i…

Temporal offers an entirely new way to build scalable and reliable applications. Temporal enables developers to focus on writing important business logic, and not on managing state or worrying about the underlying infrastructure. Backed by top VC fi…

Skydio is the leading U.S. drone company and world leader in autonomous flight. Our drones are used for inspecting the energy grid, de-escalating life and death scenarios in public safety, inspecting bridges, providing battlefield situational awaren…

Findigs is transforming the rental experience by building high-scale applications to streamline renting for millions. The company uses a modern tech stack and fosters a collaborative culture with high ownership and autonomy. The team is based in a n…

Root Insurance is hiring on the Partner Activation team for a Senior Software Engineer (and a Technical Services Engineer) to work on embedded partnerships and integrations. The role is fully remote with HQ in Columbus, OH and occasional on-sites (t…

Coder is an AI software development company focused on agentic AI for software development. They provide a self-hosted Agentic Development Environment (ADE) to deploy autonomous coding agents alongside human developers, emphasizing secure, standardi…

At Upvest, we are on a mission to make investing as easy as spending money. Upvest empowers businesses to offer a wide range of investment products and a great experience in capital market investment and retirement planning. Upvest’s Investment API …

LiveKit is building the infrastructure layer for the voice-driven era of computing. Their platform provides developers tools to build, test, deploy, scale, and observe agents in production. Currently hiring multiple roles including Senior Software E…

Trayd is building the financial operating system for commercial construction, replacing spreadsheets and legacy software with a single platform that automates payroll, union compliance, time tracking, and job costing. Construction payroll moves ~$26…

Fullstory provides privacy-preserving session replay and analytics for web and mobile apps. Current engineering roles are semi-onsite in Atlanta (1 day per week in office). Open roles include multiple software engineering positions as well as sales,…

Freeform builds AI-native manufacturing systems that unify software, hardware, and physics to produce industrial-scale parts. The company focuses on integrated systems for complex metal part manufacturing across industries like aerospace, defense, a…

Build and modernize Bloomberg's authentication infrastructure to verify identities for clients and employees. Lead design and development of next-generation authentication and MFA systems, create scalable end-to-end identity solutions across web, AP…

We build kinetic sculptures that live in iconic public spaces. Small multidisciplinary team of designers and engineers creating large data-driven installations. Role is a senior software engineer who will be a senior voice on a tight team, touching …

Findigs is transforming the rental experience by building high-scale applications to streamline renting for millions. The company fosters a collaborative culture with high ownership and autonomy, taking features from concept to deployment. Roles are…

We are hiring experienced Software Engineers to help accelerate delivery of AI solutions at our Energy company. We're looking for full-stack experience, multi-agent workflows, context engineering, agentic development. Proficiency in Python, Ruby, SQ…

We're a fast growing profitable SaaS that helps stores sell Pokemon cards (and other tcgs).

Senior/Principal Software Engineer role at Mana Pool. We make the market for Magic cards. If you play Magic, we'd love to see you apply.

Vantage is an a16z-backed FinOps / Cloud Cost Management platform that helps 15,000+ organizations globally (e.g., Block, Vercel, Temporal, Rippling, FanDuel, CircleCI) manage their infrastructure costs. The company is a Ruby on Rails shop and is wo…

We’re hiring principal-level software engineers to join the former Affera team — now part of Medtronic — building next-generation cardiac electrophysiology (EP) mapping and ablation systems. The Affera Mapping and Ablation System is designed to trea…

VC-funded startup (raised $51M Series C) building an infrastructure orchestrator and collaborative management platform for Infrastructure-as-Code (OpenTofu, Terraform, Terragrunt, CloudFormation, Pulumi, Kubernetes, Ansible). Backend is 100% Go runn…

We’re a team of experienced generalist SWEs and AI enthusiasts who are building custom AI agents for enterprise clients. You’ll work on 3-4 different projects a year and play a central role on each one. No AI experience required: we are actively try…

HqO is the leading real estate experience platform — we help commercial real estate teams and enterprises create better workplaces through digital-to-physical experiences. 57% of the Fortune 100 use our platform across 1,800+ properties in 32 countr…

Modern hardware supply chains run on spreadsheets, email, and PDFs. Silkline is building an AI-first procurement platform for aerospace, defense, and nuclear manufacturing. Customers include Machina Labs, Astranis, K2 Space, Castelion, Antares, and …

Arcol (arcol.io) is a small, high talent density team building the future of building design - a future that's collaborative, fast, and intuitive. We're a web-native, fully collaborative 3D design tool modernizing the experience of architectural des…

Lantern is building AI-powered revenue intelligence and is hiring multiple software engineering roles. Senior Software Engineer: own complex technical problems end-to-end, design scalable architecture, optimize AI model efficiency through prompt eng…

BillionToOne builds molecular diagnostics detecting disease at the single-molecule level (prenatal and oncology). Over 1M tests processed; revenue growth to ~$300M and guiding $415-430M for 2026; publicly traded and GAAP profitable. Hiring multiple …

Temporal Technologies builds a platform to help developers create scalable and reliable applications by handling state and infrastructure concerns. Backed by top VCs, the company is hiring senior-level engineers for multiple roles across cloud, fron…

Beautiful.ai — SaaS B2B presentation software (Series B, $16M funding) hiring full-time remote roles in US & CAN across engineering and sales. Multiple engineering positions offer base salary plus equity; Account Executive role offers base plus unca…