Roundly | Engineer | Remote (WorldWide WW) | Part-time / Full-time
Website: https://roundlyhq.com
Stack: astro, js, laravel, php, reactjs
Email: nesra at roundlyhq.com
290 matching jobs
Return | REMOTE | BESS Optimization Developer (Python) | Full-time
Return (https://return.energy) is hiring a developer who will build the software that powers our BESS optimization algorithms. Return’s main activity is building and operating industrial-size Battery Energy Storage Systems. Our operations are located in the Netherlands, Germany, Belgium, and Spain. You will be making a measurable (country-level) impact on the transition to renewable energy. Return recently raised €300M to support its growth.
While we employ over 130 people, our teams are deliberately small. You will join the Optimizer Quant team, which builds the algorithms that decide when and how our batteries charge and discharge. Our platform automates processes in energy storage, monitoring, market optimization, sales, project management, procurement, and construction.
We expect you to be strong in Python and comfortable with APIs and backend fundamentals, cloud, Docker, and basic DevOps. You should be able to reason about system design and architecture, and to build and operate reliable data pipelines. A working understanding of optimization, time-series and forecasting, and the statistics behind quant work will help you move fast and ask the right questions. You do not need a finance background, but you should enjoy working closely with the quants who design our algorithms.
Our tech stack/toolset is straightforward: Python, PostgreSQL, TigerData, dbt, Dagster, Grafana, Terraform, self-hosted + cloud compute. We tend to keep meetings to a minimum in order to provide at least five hours of uninterrupted coding time per day. We practice code reviews and apply automated and manual testing. Our platforms are often deployed multiple times per day.
The team includes people who have co-founded several companies and/or have experience with remote development teams since 2008. They will personally help you through most of the recruiting process (there is no recruiter involved).
Apply at https://jobs.polymer.co/return/40229
Climate Friendly | Senior Data Engineer | Sydney, Melbourne, Brisbane (Australia) | Hybrid | Full Time
We are looking for a Senior Data Engineer to lead the delivery of scalable, high-quality data pipelines that support carbon, nature, and natural capital projects. This is a hands-on, technical leadership role where you will own pipeline delivery, shape data products, and support data-led decision-making across the business.
The Senior Data Engineer is responsible for the end-to-end delivery of data pipelines as products, ensuring datasets are reliable, scalable, and aligned with business and product requirements. Acting as the data pipeline delivery lead and technical data product owner, you will translate stakeholder needs into actionable pipeline solutions while ensuring delivery meets expectations.
You will own pipeline execution, planning, and coordination, including oversight of junior engineers, while ensuring alignment with platform standards defined by the Senior Geospatial Engineer.
Please follow apply through Seek https://au.seek.com/job/92537981
Tetsuwan Scientific | Software Engineer | San Francisco (SoMa) | ONSITE | Full-time | $140K–$180K + equity | https://tetsuwan.com
We work with robots that run biology experiments. The robots are accurate, but programming them by hand takes so long that most labs don't bother. So we wrote a compiler and visual editor a scientist can use. They describe their protocol in plain language, we parse it into a structured format, and compile that to optimized code. Our end goal is to build the infrastructure for autonomous science and a centralized cloud lab. Short demo: https://tinyurl.com/mrx63phb
The team is three software engineers, an automation engineer, the founders, and soon a designer. The codebase is one monorepo containing an OCaml compiler, Python backend services, and a TypeScript/React editor. The challenges come in the form of eliciting scientific context and tacit knowledge and in the fact that a protocol has to deterministically run correctly.
We are looking for at least 3 years of experience. OCaml isn't a requirement, just a willingness to learn it. Nice if you've done DSLs, compilers, life sciences or lab automation, an ML-family language, or LLM parsing and evals.
Apply: https://jobs.ashbyhq.com/tetsuwan/ad583fec-dc0a-4b6c-8171-41...
We are hiring full-stack and applied AI engineers, as well as a UI designer, for in-person roles in NYC.
Our product helps everyone make better legal decisions by better understanding the law. About one-third of important U.S. law is not accessible via ChatGPT or Claude. Much AI-generated legal analysis is wrong. We are building one of the largest collections of U.S. law in existence and using AI to make it make sense.
We are a seed-stage start-up, still in stealth (but already with an acquisition offer!), backed by tier-1 VCs and many of the most prominent experts in legal technology. We are working with several of the best law firms in the world. We have strong customer demand and need people to help us fill it. We are committed to improving access to justice.
We are hiring a small team of extremely talented, motivated, intense, and interesting people to solve the most difficult and important problem in legal tech: high quality answers to legal questions. Expect market-leading compensation, including meaningful equity ownership. Please send your resume to contact[at]ashmere.com.
Sequent Tech | Senior Fullstack Engineer | REMOTE (Global) | Full-time | sequentech.io
Sequent builds cryptographically secure online voting infrastructure used in 200+ real elections across multiple countries. We're a fully remote team working on an open-source platform combining Rust, TypeScript, and modern DevOps. We handle End-to-end encrypted voting, cryptographic mixnets, and tamper-evident logging.
Tech Stack: Rust, TypeScript/React, WebAssembly, GraphQL, PostgreSQL, Kubernetes, Keycloak, ImmuDB
Open Roles:
Senior Fullstack Engineer (Rust + TypeScript/React)
Reach out: team@sequentech.io
Xata | Backend Engineer | Remote (Europe or East Coast US) | Full-time
Xata is building Postgres for agentic workloads.
As AI agents become software’s newest users, they need isolated Postgres environments to experiment, test, and execute safely. We enable companies to create Postgres branches instantly, giving every agent its own environment with production-like data.
We're hiring Backend Engineers to join our Control Plane, Data Plane, or Storage teams.
We're looking for engineers who enjoy building distributed systems, have strong backend development skills, and are highly self-directed. You should be comfortable taking ownership of projects and driving them from idea to production. Experience with Go, Rust, Kubernetes, PostgreSQL, or storage systems is a plus.
Ohr | Founding AI Infrastructure Engineer | Remote (US, PST Preferred)
Ohr is building critical chemicals without oil refining and reinventing the infrastructure behind chemical manufacturing.
We're hiring a Founding AI Infrastructure Engineer to build AI-powered internal systems across laboratory operations, compliance, logistics, procurement, documentation, and intellectual property.
We're looking for engineers who enjoy automating messy, real-world workflows and building reliable systems that help organizations move faster. A blend of startup and big tech experience desired.
Relevant experience may include:
Internal tools and workflow automation APIs and systems integrations LLMs in production OCR, document processing, and knowledge systems Platform, backend, or infrastructure engineering
Compensation: $150k-$220k+ plus meaningful equity.
Due to export control regulations and customer requirements, candidates must be U.S. citizens.
Interested? Email ai@ohr.xyz, mention Hacker News, and we'll send the full role description.
Hive (S14) (www.hive.co) | Engineering roles | Remote within Canada | Full-time
We power marketing for 1,500+ live event brands across North America — festivals, venues, promoters, tours. 40M+ emails and SMS a month, billions of customer data points, real-time integrations with Ticketmaster, Eventbrite, Shopify, and 20+ others.
We’re hiring across a few of our pods:
Senior Product Software Developer, Frontend / Fullstack (3+ yrs) Ship customer-facing features end-to-end. https://jobs.ashbyhq.com/hive.co/19c52872-49b4-4095-b0d6-e75...
Engineering Manager, Platform & Services (3+ yrs managing · 5+ yrs hands-on) Lead our platform, infrastructure, and integration pods. Coach the team, set the bar, and help shape engineering-wide direction as part of the eng leadership team. https://jobs.ashbyhq.com/hive.co/cc0790ff-b693-4e3f-8dba-31d...
Second Nature | Staff Software Engineer (Engineering AI Team), Staff Software Engineer, Senior Software Engineer, Engineering Manager | REMOTE (US) | Full-time
Second Nature (https://secondnature.com) is redefining professional property management with fully managed Resident Benefits Packages. We're a Resident Experience Platform helping 1,000+ property management companies automate resident onboarding, credit-building, renters insurance, utilities, and other resident services, creating "Triple Win" experiences for residents, property managers, and investors.
We're the only 7-time national NARPM vendor of the year!
Tech Stack: TypeScript, React, Next.js, NestJS, PostgreSQL, Kubernetes, Terraform, AWS. CI/CD with GitHub Actions. Domain-driven design and event-driven architecture.
Culture: We move fast ("Pirate Ship, Not a Cruise Ship"), take extreme ownership, and focus on outcomes. We're investing heavily in AI across our product and workflows, including a dedicated AI team.
Benefits: 100% remote (US), medical/dental/vision, 401K, open PTO, equity.
Open Roles:
Staff Software Engineer, Engineering AI Team ($150K-$180K) - High-agency IC building agentic AI dev workflows; the team ships 100% of its software with AI coding agents like Claude Code.
https://www.secondnature.com/careers?ashby_jid=ce8bb758-f58a...
Staff Software Engineer ($150K-$190K) - Senior IC setting technical direction across teams while staying hands-on in the codebase.
https://www.secondnature.com/careers?ashby_jid=9bc8e6af-d2bf...
Senior Software Engineer ($155K-$185K) - Full-stack across the platform: TypeScript, Python, SQL, CI/CD.
https://www.secondnature.com/careers?ashby_jid=6b92e266-4491...
Engineering Manager - Player/coach: lead 5-10 engineers, drive architecture decisions, and ship production code.
https://www.secondnature.com/careers?ashby_jid=6ac49e4d-9541...
Aquabyte | USA | Full-Time | Perception Engineer | Platform Engineer | SF HYBRID and REMOTE
Aquabyte is on a mission to revolutionize the ocean sustainability and efficiency of aquaculture. By making fish farming cheaper and more viable than livestock production, we aim to mitigate one of the biggest causes of climate change and help prepare our planet for impending population growth. Aquaculture is the single fastest growing food-production sector in the world, and now is the time to define how technology is used to harvest the ocean for generations to come. Through custom underwater cameras, computer vision, and machine learning we are able to quantify fish weights, detect sea lice infestations, and generate optimal feeding plans in real time. Our product operates at three levels: on-site hardware for image capture, cloud pipelines for data processing, and a user-facing web application. As a result, there are hundreds of moving pieces and no shortage of fascinating challenges across all levels of the stack.
See our full list of open roles at https://jobs.lever.co/aquabyte/ and learn more about Aquabyte at https://www.aquabyte.ai. Email gem.openreq@aquabyte.ai if you have any questions!
• Perception Engineer (SF Hybrid or Remote): https://jobs.lever.co/aquabyte/2c47d0eb-cc40-4a69-a0e1-048df... https://jobs.lever.co/aquabyte/a3c965b2-a169-408f-9867-3c038...
• Sr. Software Engineer - Platform Engineer: https://jobs.lever.co/aquabyte/ee780744-3f37-4e65-8471-05a5b...
Pelotech | Staff Software Engineer | REMOTE (US Only) | Full-Time
We're Pelotech (https://www.pelotech.com), a software consulting company. We are deeply technical but also deeply human: approachable, adaptable, curious, and helpful. We aren't here to blindly build features; we're here to solve problems thoughtfully.
We're looking for a Staff Software Engineer who enjoys working directly with clients, mentoring engineers, and solving messy real-world problems.
You might call yourself a passionate polyglot, versatile specialist, or curious expert. We're looking for engineers with 5+ years of experience, strong backend skills, proficiency in languages such as TypeScript, Go, Python, Java, or Rust, and familiarity with Kubernetes, Terraform, ArgoCD, AWS, and GCP.
We value curiosity, pragmatism, kindness, autonomy, and people who enjoy learning new technologies.
Compensation: $160k–$210k base salary + 10–20% profit sharing + full benefits.
Contact: [henry.anderson@pelo.tech](mailto:henry.anderson@pelo.tech) https://www.linkedin.com/in/henryanderson9/
Rhythm | Chicago / Remote (Ok for exceptional candidates) | Senior ML Engineer | Full-time
We are a KP-backed startup that is solving sleep apnea for 1bn people. We are looking for an exceptional ML/AI engineer to help build human simulators.
Our team is full of world class technical talent and this is a once in a lifetime opportunity to meaningfully improve the daily lives of people around the world.
Please email us a proof of any one exceptional AI project at kanishk [at] rhythmpap [dot] com.
Bonus points if you've had to titrate a CPAP before
Tech Mahindra | Full-time, all levels | India, USA, Canada, Mexico | techmahindra.com
Tech Mahindra’s Cloud Advisory division is hiring engineers (4+YoE) and cloud solution architects (8+YoE) to help enterprises modernize and operate at scale on AWS, Azure, and GCP. We value folks with a strong software development background who have grown into cloud and platform engineering roles. Our work spans cloud application modernization, platform engineering, DevOps, SRE, SecOps, and FinOps. Any experience with using AI to improve cloud platforms, DevOps or operations is a plus.
We’re hiring across all levels and geographies (India, Mexico, Canada, USA).
Roles include: Cloud Engineers, Platform/DevOps/SRE, Cloud Architects, DevSecOps, Tech Leads, and Engineering Managers.
Apply: Send your resume to cprabala@techmahindra.com (mention HN – Cloud Advisory).
Fold | Remote (US Only) | Senior Back End Engineer | Full-time
Fold is a publicly listed bitcoin financial services company building the tools people need to earn, buy, sell and live on Bitcoin. We're looking for a Senior BE Engineer to help build the financial infrastructure behind our products - payment processing, ledger systems, card transaction flows and event-driven pipelines.
- 5+ years software engineering experience
- Strong in: Java or similar (Kotlin, Scala, C#)
- Experience with: production microservices, distributed systems
- Familiar with: messaging/event streaming (Kafka, Pulsar)
- Solid relational database and data modeling skills
- Nice-to-have: fintech, payments, ledger/accounting domains
- Nice-to-have: event-driven architectures, CQRS, event sourcing
- Nice-to-have: Micronaut, Quarkus or similar modern Java frameworks
- US residency (regulatory requirement)
Email tiffany.sawhney (a) foldapp.com if you have questions or apply here: https://ats.rippling.com/fold-inc/jobs/514ba20e-a93e-4960-ad... [0] https://foldapp.com
Stream (https://getstream.io/) | Staff Database Reliability Engineer - PostgreSQL | Amsterdam or Remote (Europe) | Full-time | Visa Sponsorship
Stream runs 35–40 PostgreSQL databases (largest: 15TB) behind high-write, high-concurrency APIs serving billions of requests a month. We're migrating from AWS RDS to self-hosted Postgres on Kubernetes and need someone who has owned this end-to-end: query plans, vacuum and bloat, replication, backup, HA, sharding.
Required: deep Postgres internals (MVCC, the query planner, autovacuum), real sharding experience beyond table partitioning, self-managed databases in production, and enough engineering depth to work directly with application teams on access patterns.
Explicit non-goals: RDS/Aurora-only backgrounds, analytics/data-warehouse experience, or DBAs who don't code.
Strong plus: CloudNativePG, Kubeblocks, logical replication, CockroachDB experience.
Apply here: https://jobs.ashbyhq.com/stream/44056edb-2489-4187-97ff-afe0...
Senior Software Engineer| New York City | Fintech
Tapitab is a stealth-mode fintech startup building a proprietary self-learning customer intelligence platform for the US hospitality industry. We are patent-pending across multiple core innovations and are moving fast toward launch.
We are looking for a Senior Software Developer to join our technical team and take full ownership of building our POS software layer — including payment integration, tab origination and settlement flows, and Android application development on a handheld payment device.
What We Need:
• 5+ years of Android development experience (Java or Kotlin) • Hands-on payment processor API integration — Stripe, Shift4, Fiserv, Worldpay, Finix, or equivalent • Deep knowledge of EMV, NFC, and contactless payment standards • Proven experience building POS software for bars, restaurants - hospitality industry • Prior work with leading POS system providers is a strong plus • Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent
What We Offer:
• Ground-floor opportunity at a stealth-mode startup with genuinely novel, patent-pending technology • Full contract basis at a competitive rate — OR — salary + equity for the right candidate • Work directly with the founding team on a greenfield architecture — no legacy code • Location: ONSITE - New York City
This is not a general dev role. We need someone who has built payment flows before and understands the hospitality POS environment from the inside.
Interested? Send your resume and a brief note on your POS and payments experience to:
info@tapitab.com
Senior Python Backend Engineer | REMOTE (EMEA/APAC)
We’re looking for Python backend engineers to work on a trustless supercluster of performance-proofed GPU-enabled sandboxed docker container runners controlled by truly decentralized algorithms (not just PAXOS or RAFT).
Wow, that was a mouthful...
If you found it interesting, join Reef Technologies and tackle complex technical challenges like this on your own terms:
- Contribute from wherever you like, we are fully remote - Set your own time commitment, as long as it’s at least 30h per week - See how we work in our handbook: github.com/reef-technologies/handbook - Influence the way we operate through our Sociocracy 3.0 decision-making process
Salary on a B2B contract:
- 45-70 USD or 180-280 PLN per hour - Flexible work schedule (as measured with a time tracker) - We automatically adjust rates based on inflation twice a year
We're looking for someone with 5+ years of programming experience, including at least a year with Python (including opensource and significant personal projects).
So, what do you think? You don't even need a CV; just go to https://careers.reef.pl/?utm_source=hackernews and shoot a few quick commands to apply.
Contact: hiring@reef.pl Web: https://reef-technologies.com/
Piramidal | Senior Backend, Infra, Frontend Engineers | NYC onsite | Full-time
Piramidal is looking for senior software engineers - frontend, backend, and infra - who are excited about solving difficult problems at the boundary of foundational AI and neuroscience. We work on real-time monitoring of neurological data to help clinicians better treat their patients.
Our core backend and infra stack is Python, Go, and Terraform deployed to various cloud and on-prem, while our frontend stack is React and TypeScript. Bonus points for either: standing up and maintaining reliable streaming systems with a production/ops mindset; or building smooth, data-intensive React UIs with modern plotting/visualization libraries.
You would take an active role in architecture and design, implementation, and hiring from your early days, and will have the opportunity to have ownership commensurate to your capacity and interests.
Apply for jobs here: https://job-boards.greenhouse.io/piramidalinc
Puntt AI | SF Hybrid | Forward Deployed Engineers | Founding Sr. Applied AI Engineers | Salary: $180,000 - $210,000 USD + equity, benefits and unlimited PTO
One of our customers has thousands of packaging assets spread across dozens of markets, languages, regulations, and brand standards.
Every change needs to be reviewed before launch. Humans currently do most of that work.
We are automating it. The challenge isn't generating text. The challenge is building systems that can be wrong almost never.
We're looking for:
- Forward Deployed Engineers who enjoy sitting with customers, figuring out what's actually broken, and building solutions faster than a roadmap ever could.
- Applied AI Engineers who obsess over retrieval, evaluation, orchestration, reliability, and all the ways AI systems fail in production.
Small team. Real customers. Revenue. Lots of difficult edge cases.
Please reach out directly if interested: linkedin.com/in/christinakayler