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Arc Exclusive

7 active opportunities available

Jobs

Arc Exclusive

Freelance Backend Developer

The company is looking for a skilled Freelance Senior Backend Developer to work on a live PropTech SaaS application. This application has a Supabase/PostgreSQL backend and a React frontend, and was built using Lovable AI-assisted development. The role involves conducting a security audit and refining the multi-tenant role architecture, as well as taking over ongoing feature development. Juliana Torrisi is the contact person for this role and can answer any questions. The role requires the developer to conduct a thorough security audit of Row Level Security policies and refine the multi-tenant role architecture. The developer will also review and harden payment commission logic within the existing architecture. The codebase is currently AI-generated via Lovable, so the developer should be comfortable reading, auditing, and extending existing code. The company is looking for a developer with proven experience in Supabase and PostgreSQL, especially Row Level Security in production. The developer should also have a strong understanding of multi-tenant architecture and role-based access control. Benefits - Opportunity to work on a live PropTech SaaS application - Chance to conduct a security audit and refine the multi-tenant role architecture - Take ownership of the codebase going forward Eligibility - Proven experience with Supabase and PostgreSQL, especially Row Level Security in production - Strong understanding of multi-tenant architecture and role-based access control - Comfortable auditing and extending an existing codebase (including AI-generated code) - Nice to have: familiarity with React, experience in PropTech, real estate, or marketplace/SaaS commission models Required Documents 2. Prepare any questions you may have for Juliana Torrisi, the contact person for this role. 3. Click the Apply button below to submit your application.

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Qt/C++ GUI Developer (Embedded Electro-Optic Systems) - PT - US/NA

A manufacturer of electro-optic devices is seeking a senior Qt developer to design and build the graphical user interface for next-generation devices. The company is transitioning from analog to digital product lines. The ideal candidate will work closely with the company's FPGA/hardware engineer to define technical requirements and integration points. The interface will run on embedded hardware, controlled via a small physical button array, allowing users to switch between imagery backgrounds and overlays. The role involves designing and developing a Qt-based GUI for embedded electro-optic hardware, with a focus on creating a simple and robust UI architecture. The developer will participate in scoping discussions with the end client as needed and build for long-term, ongoing collaboration across multiple device generations. The company is looking for a candidate with strong hands-on experience with Qt and C++-based GUI development. The position requires collaboration with a non-technical team, advising on UI/UX architecture decisions, and participating in pre-development planning phases. The company is looking for a candidate who can work independently and communicate effectively with the client, who is based remotely. Responsibilities - Design and develop a Qt-based GUI for embedded electro-optic hardware, controlled via physical buttons - Collaborate with the FPGA systems engineer to define technical requirements and integration points - Advise the client on the simplest, most robust UI architecture for their goals - Participate in scoping discussions with the end client as needed - Build for long-term, ongoing collaboration across multiple device generations Requirements & Qualifications - Strong hands-on experience with Qt (C++-based GUI development) - Working knowledge of C++ and Python - Experience designing UI for embedded/hardware-constrained systems - Fluent English (remote client communication, async-friendly) - Must be a U.S. citizen, as the role touches ITAR-controlled end products - Background in electro-optics, military-grade sighting/imaging systems, or similar defense-adjacent hardware - Familiarity with camera/imaging pipelines Benefits - Remote work arrangement - Opportunity for long-term, ongoing collaboration across multiple device generations - Direct input into UI/UX architecture decisions during the pre-development planning phase 2. Prepare your resume and any supporting materials, such as code samples or references. 3. Click the Apply button below to submit your application.

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Senior Full-Stack Engineer — TypeScript, React & AWS (PT-LATAM)

The company is hiring a Senior Full-Stack Engineer to work on their Spanish-language platform for entrepreneurs. This role involves taking over an existing codebase and improving its functionality. The ideal candidate will have experience with TypeScript, React, Node.js, and REST APIs, as well as AWS application development. They must also have professional Spanish fluency and reside in Latin America. The company needs someone who can work effectively with non-technical stakeholders and communicate technical issues and recommendations clearly. The role is full-time and based in Latin America. The platform is designed for entrepreneurs, and the company is looking for someone who can enhance and refine it. The Senior Full-Stack Engineer will be responsible for the platform's technical development and will need to prioritize high-impact work. Responsibilities - Analyze and comprehend the existing frontend, backend, database, and cloud architecture - Assume full-stack development responsibilities, ensuring seamless integration and enhancement of the platform - Identify and rectify bugs, incomplete functionalities, and technical risks - Develop and enhance product features in alignment with business priorities - Work proficiently across the React frontend and TypeScript/Node.js backend - Maintain and improve AWS-based services and infrastructure - Manage relational and NoSQL databases efficiently - Support and integrate third-party services such as authentication, payments, analytics, and messaging - Contribute to the development of AI-powered product functionalities - Enhance the platform's reliability, maintainability, and performance - Communicate technical issues and recommendations effectively to non-technical stakeholders - Document significant technical decisions, risks, and forthcoming steps Requirements & Qualifications - Proficient in TypeScript, React, Node.js, and REST APIs for full-stack development - Experienced in AWS application development, including AWS Lambda and cloud-based deployments - Skilled in SQL and database development, particularly with PostgreSQL or similar relational databases - Proven experience in taking ownership of an existing codebase, identifying technical debt, and making safe changes - Strong communication skills, able to work effectively with non-technical stakeholders and prioritize high-impact work - Professional Spanish fluency and residence in Latin America, with the ability to work within Latin American time zones - Experience with NestJS or other structured Node.js frameworks - Familiarity with AWS services like Aurora, RDS, DynamoDB, and infrastructure as code tools such as AWS CDK or Terraform - Knowledge of AI platforms, Stripe subscriptions, and authentication platforms like Auth0 - Understanding of product analytics tools, messaging integrations, and UI frameworks like Tailwind CSS - Experience with automated testing tools and supporting startup product launches - Familiarity with AI coding tools such as GitHub Copilot are specified in the source. 2. Prepare your resume and any other required documents, such as a cover letter or portfolio. 3. Click the Apply button below to submit your application.

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Real-Time AI Orchestration Engineer (WebRTC / Mobile) - PT/FT - Worldwide

The company is hiring a Real-Time AI Orchestration Engineer to build a real-time, voice-first AI experience for mobile devices. This role involves architecting a system to start and stop live streaming sessions on demand while controlling costs. The position is a remote contract job requiring around 30 hours of work per week for approximately three months, with potential extension. The ideal candidate will have production experience in real-time streaming media, such as WebRTC, and a hands-on approach to building and shipping apps. The company needs someone who can work during US Eastern time hours. The role involves working with React Native, low-latency conversational voice pipelines, and focusing on cost and latency at the streaming layer. This is a contract position, not a full-time job. The company is looking for someone with specific experience, including genuine production experience with real-time streaming media and a hands-on approach to building and shipping apps. Responsibilities Architect a system to start and stop live streaming sessions on demand Switch between streaming vendors invisibly under a strict latency budget Hide the spin-up of live streaming sessions Keep cost-per-minute under control Requirements & Qualifications Genuine, production experience with real-time streaming media — WebRTC, or frameworks built on it (LiveKit, Daily, Pipecat) Experience building a live, low-latency conversational voice pipeline — real turn-taking, barge-in, sub-second response Working competency with React Native Experience shipping apps to the App Store / Google Play Focus on cost and latency at the streaming layer (cost-per-user-per-minute) Hands-on individual builder who can point to real shipped work Benefits Remote contract position ~30+ hrs/week ~3 months to build the prototype, with potential to extend 2. Prepare your application, including any relevant experience and examples of your work. 3. Click the Apply button below to submit your application.

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Senior C#/.NET Engineer (Trading System) - Part-time - Overlap PST (2)

The client needs a Senior C/.NET Engineer to finish, integrate, stabilize, and deliver a fully working trading bot for a partially built automated futures trading system in C/.NET on Quantower. The ideal candidate has 5+ years of experience as a senior C/.NET developer, with experience building automated or algorithmic trading systems. The job involves implementing AI model persistence, building an AI training pipeline, integrating AI and wavelets into a unified strategy, and verifying wavelet IDWT round-trip integrity. The developer will work on a trading system, making the system run end-to-end inside Quantower, adding backtesting and performance verification, and implementing full .NET logging. The client is looking for someone with a signal processing or applied mathematics background, experience with wavelet analysis, and personal trading experience in futures. The developer should be able to communicate clearly and deliver reliably, with weekly syncs, consistent versioning, and accurate change logs. This is a part-time position that overlaps with Pacific Standard Time. Responsibilities Implement AI model persistence Build the AI training pipeline Integrate AI + wavelets + rule-based strategies into a unified strategy Verify wavelet IDWT round-trip integrity Make the system run end-to-end inside Quantower Add backtesting and performance verification Implement full .NET logging Improve stability: multithreading, race conditions, error handling Validate signal quality and ensure logical, consistent outputs Document the system and show the client how to operate it Requirements & Qualifications Senior C/.NET developer with 5+ years of experience Experience building automated/algorithmic trading systems on retail or institutional platforms Personal trading experience Signal processing or applied mathematics background Experience with wavelet analysis Experience picking up and extending someone else's partially-built codebase Clear communication and reliable, accountable delivery Benefits Paid trial engagement available before long-term commitment 2. Prepare your profile and experience to demonstrate your qualifications. 3. Click the Apply button below to submit your application.

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Founding AI Engineer

OmaScan, a healthtech startup, is looking for a Founding AI Engineer to help develop an AI assistant for home assessments. The company aims to improve the lives of seniors and people with accessibility challenges by automating the paperwork process for clinicians. This role is for a very early-stage company, and the engineer will play a key part in shaping the product and engineering culture. The ideal candidate will have experience with retrieval, structured outputs, and handling messy multimodal inputs. They should also have a background in shipping LLM systems into production and working in fast-paced environments or startups. The role involves a lot of freedom and responsibility, including ingesting raw assessment data, generating reports, and building post-assessment follow-up workflows. OmaScan has raised funding and has real pilots across Canada, but it is still an early-stage company with a lot to build. This founding-level role comes with founding equity, a competitive salary, and the potential for significant upside. Responsibilities Ingesting messy inputs, such as dictations, photos, measurements, and 3D scans, and turning them into clean, structured data Generating reports that fill existing clinic templates and creating quick summaries for assessors to share with clients, vendors, or colleagues Building agentic post-assessment follow-up workflows Handling health data correctly, safely, and in line with privacy regulations Weighing in on product decisions and participating in customer calls Working alongside existing engineers and outside contractors Traveling to pilot sites and conferences as needed Requirements & Qualifications Experience with retrieval, structured outputs, and messy multimodal inputs Background in shipping LLM systems into production Ability to own something end-to-end and make architecture calls independently Experience working in fast-paced environments or startups, particularly in healthtech Strong experience with full-stack development, mobile application development, and LLM application development Knowledge of real-time AI visual processing, product sense, and judgment to make product calls Bonus experience with multimodal AI, agentic and tool-using systems, healthcare or regulated industry experience, 3D data ingestion and pipelines, and AWS infrastructure depth Benefits Founding equity Competitive salary Opportunity for significant upside Hybrid work arrangement in Toronto or St. John's 2. Prepare your application, including a brief description of your most interesting full-stack project and why this role interests you. 3. Click the Apply button below to submit your application.

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AI Automation Specialist

The company is hiring an AI Automation Specialist to work on projects focused on AI integration and backend development. The goal is to use AI to improve automation processes and integrate backend systems efficiently. This role involves implementing AI automation solutions, working on backend integration projects, and collaborating on multiple projects. The ideal candidate will have experience with AI automation tools, a strong background in backend integration and development, and the ability to manage multiple projects. The company is looking for someone who can work with diverse project teams and adapt to different industry needs. They should also be familiar with modern AI technologies and their application in automation. The job requires working closely with stakeholders to understand project goals and deliver effective AI-driven solutions. The company is looking for a skilled individual to fill this position and contribute to the development of AI automation solutions. Responsibilities Implement AI automation solutions using Claude Code or Codex to optimize existing processes Engage in backend integration projects, ensuring seamless connectivity and data flow across systems Collaborate on multiple projects, adapting to different requirements and challenges Work closely with stakeholders to understand project goals and deliver effective AI-driven solutions Requirements & Qualifications Proficiency in AI automation tools like Claude Code or Codex Strong background in backend integration and development Ability to manage and execute multiple projects with varying scopes Experience in working with diverse project teams and adapting to different industry needs Familiarity with modern AI technologies and their application in automation 2. Prepare your application materials, including your resume and any other required documents. 3. Click the Apply button below to submit your application.

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