Toolkit LLC | Full-stack web application developer | REMOTE (US) | Full-time | 90k-140k/yr USD

Toolkit is a fast-growing environmental technology company that has developed a suite of applications used by industrial facilities to manage environmental compliance.

Our platform includes applications for managing environmental permits and compliance obligations, calculating and tracking air emissions, completing TRI and Tier II reporting, managing hazardous waste, and tracking chemical inventories. We've also developed Ivy, an AI assistant integrated into our platform.

We're looking for a full-stack developer to support, maintain, improve, and expand these applications. You'll work across an established and growing software platform, developing new features, resolving issues, and helping us introduce new AI capabilities. You'll also collaborate with our affiliated environmental and sustainability law firm and air dispersion modeling group.

Eligible for health benefits after probationary period. Residence in Arizona is preferred, but not required. Flexible schedule, though overlap is needed with 8am-5pm AZ time Monday through Friday.

Required Skills: TypeScript, Frontend Development, Node.js, AI-Assisted Development

Hiring Process: Shortlisted candidates will participate in a one-hour video conference. This session will include a discussion, practical programming exercise, and a brief code review.

Interested? Send the following to tyler [at] tritoolkit.com:

- Your resume.

- A brief description of something you built that you are proud of.

- A link to your GitHub or portfolio site, if available.

Epsilon |Hybrid (Chicago, IL) | Full time | $150-$160K USD

Hello everyone, Epsilon is hiring for a Lead Software Engineer. This is a hybrid role working out of our downtown Chicago office. Looking for backend/API development as well as data engineering experience.

Apply here: https://careers.publicisgroupe.com/epsilon/jobs/151072?lang=...

Who's hiring a customer success, guide onboarding specialist and account management roles remotely in US UK and other European countries, Netherlands Germany or even worldwide

LiveKit|http://livekit.io/| VoiceAI | webRTC | Remote | Full Time LiveKit is building the infrastructure layer for the voice-driven era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe agents in production. Hiring:

>> Solutions Architect | UK (Remote): https://jobs.ashbyhq.com/livekit/63cec43b-4627-4494-b70d-cb7...

>> Solutions Architect | Germany (Remote): https://jobs.ashbyhq.com/livekit/d79e72d0-8bde-42b8-8a21-184...

>> Staff Product Manager, Telephony | North America (Remote) or SF (Hybrid): https://jobs.ashbyhq.com/livekit/d0dbf189-af6d-400e-ac1f-4da...

Co-founders: Russ d'Sa (CEO) https://www.linkedin.com/in/russelldsa/ & David Zhao (CTO) https://www.linkedin.com/in/davidzhao/

Check out our blog: https://livekit.com/blog

Our other roles: https://jobs.ashbyhq.com/livekit?utm_source=1bpyr8q375

Polymath | Founding MTS, Full-Stack | San Francisco | ONSITE (5 days) | $160K–$220K + 0.75%–1.5% equity | https://polymathmade.com

Polymath builds AI agents that read engineering drawings, generate CAD models, and rebuild parts across CAD systems. We're VC-backed, Harvard- and Stanford-founded, in production with our first product, and running pilots with Fortune 100 manufacturers in aerospace and consumer hardware.

We're hiring our first dedicated full-stack engineer to own the product stack end to end: the chat UIs inside CAD (TypeScript/React over MCP and REST), the Python/FastAPI services behind them (auth, job orchestration, metered billing with Auth0 and Stripe), and the pipeline that packages and deploys it all. You report to the CEO, join customer calls, and set the standards for the next ten hires.

Looking for: 5+ years running production web apps with ownership across front end, API, and deployment; prior early-stage experience (first 50 engineers somewhere); TypeScript and Python; shipped on AWS or GCP with Terraform/CloudFormation and Kubernetes/ECS/Cloud Run. Nice to have: LLM product ops, enterprise SSO, C#/C++ desktop packaging, any CAD or mech-eng curiosity.

Must be authorized to work in the U.S. Immediate start.

Apply: email careers@polymathmade.com with a resume, a GitHub or portfolio link if you have one, and a few sentences on a system you built and ran in production. I read every application and reply within a week. Full JD: https://polymath-ai.notion.site/careers-1

Location: Bangalore, India (IST / UTC+5:30) Remote: Yes (Worldwide) Willing to relocate: Yes (Worldwide, visa sponsorship required) Technologies: TypeScript, Node.js, Go, Python, React, PostgreSQL, MongoDB, Redis, RabbitMQ, BullMQ, AWS, Docker, WebSockets, WebRTC, GraphQL, OpenAI, RAG, Vector DBs, ONNX Runtime, Grafana/Loki Résumé/CV: https://drive.google.com/file/d/1kHPNmquEQniZlqC8bJYhCKPTztC... Email: shubhankars361@gmail.com

Senior Software Engineer (~5 YoE) building real-time AI systems, event-driven backends, and distributed infrastructure in Node.js/TypeScript, Python, and Go. Available immediately.

Experience:

- Playhouse Media (Senior SDE): Re-architected real-time voice AI for sub-300ms latency (streaming LLMs, STT/TTS), Redis/BullMQ queues, Stripe billing, and Grafana/Loki observability (-80% MTTR) powering https://secretdesires.ai

- Troopr Labs (SDE): Built enterprise AI Agent Assist & RAG pipelines (Jira/Salesforce), vector search, and WebSockets; optimized Node.js concurrency to boost AI throughput by 40%.

- Zeeve (Software Engineer): Built distributed notification and async event infrastructure using RabbitMQ, Node.js, TypeScript, and PostgreSQL.

Shipped & Open Source:

- ServerPulse (https://serverpulse.strangr.space): VPS monitoring platform with a lightweight Go telemetry agent and React dashboard.

- EmbedServe-ORT (https://github.com/shubhankar-mern/EmbedServe-ORT): CPU-optimized ONNX embeddings server with an OpenAI-compatible REST API.

- redis-lua-rate-limiter (https://www.npmjs.com/package/redis-lua-rate-limiter): Atomic Redis Lua token-bucket rate limiter for Node.js.

Portfolio: https://shubhankar-devv-portfolio.pages.dev GitHub: https://github.com/shubhankar-mern LinkedIn: https://www.linkedin.com/in/shubhankar27

Stealth Health-Tech Startup | Senior Backend/Infrastructure Engineer | San Francisco | ONSITE | Full-time | [salary range] + generous equity

We're a rapidly growing, venture-backed stealth startup helping people understand their medical records and lab results. We need an engineer to own security (HIPAA/SOC 2, KMS, IAM, audit logging), indexing and querying large volumes of medical data in Postgres, and scaling a serverless backend as traffic grows.

Stack: TypeScript, Next.js, AWS serverless (Lambda, Aurora Postgres, SQS, Step Functions), CDK.

Apply (5 min): https://forms.gle/N9U7zkz2zaUUtunV7

Collabify | Senior Full-Stack Engineer (backend-heavy) | REMOTE (worldwide) | Contract, 4–5 months | $3,000–4,000/month

I'm looking to hire our first engineer to own architecture and build product first version.

Stack: TypeScript, React/Next.js, Node.js and PostgreSQL.

The core challenges: tenant isolation on a shared Postgres schema with row level security, multiple authentication flows, subdomain-based client portals and large video uploads.

You should have personally shipped and maintained a production multi-tenant SaaS product, have strong PostgreSQL and data-modelling experience, and be able to explain your architectural decisions and trade-offs.

Terms: a paid 4–5-month contract, 20-30+ hours/week, at $3,000–4,000/month, paid against agreed milestones. At least three hours of daily overlaps. For the right person, there’s potential to continue in a founding role with equity

Process: a short application, a live walkthrough of something you've built, then a paid 2-3hr tenant-isolation exercise and a 30-minute discussion.

Apply here:https://forms.gle/yJAabKvLKtJmfz21A

Public source code isn't required. Please don't share confidential employer or client material.

Sunsave | Product Engineer (Mid-Level / Senior) | London, United Kingdom (Holborn) | ONSITE (hybrid, 3 days/week in office) | Full-time

Sunsave is building what replaces your energy supplier. Customers switch to solar and a battery with nothing to pay upfront: kit, install, finance and long-term protection in one package, and the battery trades energy on the grid every day to push their bills towards zero. Founded in 2022, £113m Series A (equity and debt) in 2025, more than 3x growth last year, nearly 90 people.

I lead engineering and data science. Software runs every step of the customer journey: the quote, the finance application, the contract, the install and the battery trading. You'd join a small squad on one area: acquisition (website, quote, finance, contract), installation, in-life (customer app, monitoring, maintenance) or energy (battery optimisation and grid trading).

Product engineers here own problems end to end, from working with the people who use what they build to running it in production. Agents do a lot of the implementation. We expect you to use them every day, delegate the implementation but never the thinking, and own every line you merge. We offer finance and hold customer data, so correctness, auditability and security matter a lot.

Experience: 2+ years running production software for mid-level, 6+ for senior. TypeScript, NestJS, React/Next.js, PostgreSQL and AWS are a plus but not required. Right to work in the UK required.

The interview is built for how we work. No leetcode. A ~45 min async review of a pull request written with AI, then a ~90 min live session where you shape and build a small problem close to our work with your own AI tools.

JD: https://sunsave.notion.site/Sunsave-Product-Engineer-410e7b6... Apply: https://ats.welcometothejungle.com/board/sunsave-RTBuAt/job/...

Tecla IO | Digital Sales Specialist | REMOTE (Worldwide) | Paid, $10 -$13 per hour

We are searching for a high-energy communicator to join our team as a Digital Sales & Communications Specialist. If you love building rapport, solving problems, and turning casual chats into meaningful business wins, this opportunity is built for you.

Key Responsibilities & Focus Direct Outreach: Initiate contact with prospective clients using phone lines, digital messaging, and email networks. Advisory & Solutions: Listen closely to customer inquiries and present our offerings clearly and effectively. Record Management: Log notes, track lead stages, and update pipeline info cleanly using our CRM. Team Innovation: Share feedback and brainstorm strategies during our regular team meetings. Compensation & Rewards Hourly Pay Rate: $10.35 – $13.95 / hour

To apply: lily.stewart.recruiting@outlook.com

Subject: Digital Sales & Communications Specialist

Amodo Design | Compute Infrastructure Lead | ONSITE (UK) | Fulltime, Paid

Amodo Design is a hardware engineering company based in Sheffield (UK).

I am looking for someone to manage our small HPC cluster that we use for software and hardware R&D.

Full job ad here: https://amododesign.com/career/compute-infrastructure-lead/

DevOps Engineer Hybrid, 3 days a week in the office Hong Kong Full-time

We are looking for a DevOps Engineer to own, scale, and secure our cloud and on-premise computing environments. You will work closely with ML researchers, data scientists, and software engineers to streamline model training, optimize GPU cluster utilization, and automate our continuous integration and deployment (CI/CD) pipelines.

Core Responsibilities AI & GPU Infrastructure Management: Provision, monitor, and scale high-performance GPU clusters (NVIDIA H100/A100, CUDA/ROCm setups) for heavy model training and inference workloads. MLOps & Model Serving Pipelines: Support model deployment, fine-tuning, and low-latency inference optimization using open LLM ecosystems (e.g., vLLM, Triton Inference Server, Llama, Mistral). CI/CD & Automation: Design, build, and maintain robust CI/CD pipelines for both software services and ML model artifacts using GitHub Actions, GitLab CI, or ArgoCD. Infrastructure as Code (IaC): Manage cloud resources (AWS, GCP, or Azure) repeatably using tools like Terraform or Pulumi. Containerization & Orchestration: Deploy, scale, and manage distributed containerized workloads using Kubernetes (K8s), Docker, and KubeFlow or Ray. Observability & Reliability: Implement logging, tracing, and metric dashboards (Prometheus, Grafana, OpenTelemetry) to track cluster health, GPU memory/utilization, and inference latency. Security & Governance: Enforce DevSecOps practices, secret management (HashiCorp Vault), container image scanning, and access controls tailored for sensitive AI datasets and models. Required Qualifications Experience: 3+ years of experience in DevOps, Site Reliability Engineering (SRE), or Cloud/Platform Engineering, with exposure to MLOps or AI/ML workloads. Cloud & Containers: Strong hands-on experience with AWS, GCP, or Azure, alongside production Kubernetes and Docker management. Scripting & Programming: Proficiency in Python, Bash/Shell, or Go for automation and tooling. IaC & CI/CD: Demonstrated mastery of Terraform, GitOps workflows, and automated testing/deployment pipelines. AI Ecosystem Knowledge: Familiarity with GPU node provisioning, distributed storage for massive datasets, and model serving runtimes. Preferred Qualifications Experience with LLM orchestration frameworks (LangChain, Ray Serve, vLLM). Bachelor's or Master’s degree in Computer Science, Computer Engineering, or a related technical field. Active cloud or Kubernetes certifications (e.g., CKA, AWS/GCP DevOps Engineer).

Apply: https://round1.work/listings/listing_tenant_a741427d-313d-41...