Jobs Node.js

Fully remote · Start hourly → convert to full-time

About us

We build and scale health & wellness digital subscription / web products (info products, assessments, companion-style apps). Product + growth move fast: a lot of early surfaces are vibe-coded, then need to become real production systems next to media buying and analytics.

About the role

Backend-leaning full-stack engineer who can take vibe-coded funnels and products (e.g. Base44-style builds, GitHub exports, AI-generated apps) off the sandbox and onto self-hosted infrastructure — then wire pixels, GTM, GA4, Amplitude, and payment APIs so ads and subscriptions actually track and charge correctly.

You do not need quiz-funnel DNA. That’s a plus, not a requirement. You do need to read PSP/docs carefully and ship reliably.

What you’ll do

• Export / migrate vibe-coded projects (GitHub / similar) into clean repos and self-hosted environments
• Own hosting, deploys, env/secrets, basic ops for funnel + product surfaces
• Connect Meta / Google (and related) pixels; implement GTM + GA4 events correctly (purchase, subscribe, trial, etc.)
• Instrument Amplitude (or equivalent product analytics) so growth can see funnels end-to-end
• Integrate payment APIs — Stripe, Adyen, NMI (and similar) — checkout, webhooks, subscription status, refunds as needed
• Work with PMM / UA / product on event naming, debug broken tracking, harden what “vibe code” left fragile

Must-have

• Strong backend + enough front-end to ship funnel/product pages and tracking scripts
• Real experience putting apps on self-hosted / VPS / container infra (not only managed toy deploys)
• Hands-on GTM + GA4 (and pixel) event wiring you can walk through
• Amplitude (or very similar product analytics) in production
• At least one of Stripe / Adyen / NMI (others welcome) — comfortable reading API docs + webhooks
• English enough to read technical docs and async with the team

Nice-to-have

• Quiz / long-form web funnel or subscription paywall products
• PSP aggregators (Solidgate, Apigate, etc.)
• CAPI / server-side events; Meta signal quality hygiene
• Node / Python / PHP / Next — whatever ships; stack is secondary to shipping production

Not a fit

• Pure front-end / design-only
• Never owned hosting or production deploys
• “I’ll learn payments later” with no API/webhook history
• Looking only for a slow enterprise FT ramp with no hourly start

How we hire

This is a full-time seat, but we start immediately on hourly until we’ve shipped enough together to convert to FT.

How to apply

In your application (or first message), list exactly what you can already do from what we need — short yes/no or 1-line proof for each:

1. Take a vibe-coded / AI-built app (GitHub export / Base44-style) and move it to self-hosted infra
2. Own hosting / deploys / env / secrets for a live web product
3. Wire Meta/Google pixels
4. Implement correct events in GTM + GA4 (purchase / subscribe / trial / etc.)
5. Set up or run Amplitude (or equivalent) on a product funnel
6. Integrate payments via API docs — which of Stripe / Adyen / NMI (or similar) you’ve done, including webhooks / subscriptions if any
7. Hourly availability to start now + when you could go full-time

Optional plus: quiz / long web-funnel or subscription paywall experience (not required).

About the Client

Our client is a fast-growing deep-tech startup building advanced solutions for monitoring large-scale critical infrastructure. Their technology combines innovative fiber-optic sensing with machine learning to turn existing optical fiber into a real-time distributed sensor, helping monitor infrastructure such as power grids, pipelines, railways, roads, and other critical assets.

They are building a scalable, cloud-native platform designed to solve real-world, high-impact problems. Their culture is product-driven, fast-paced, and ownership-oriented. They value strong engineers who think like builders, move fast, and care deeply about quality.

We are looking for a Senior AI-Integrated Full Stack Engineer to join our client’s applications engineering team. You will play a key role in designing, building, and scaling their platform end-to-end — from intuitive frontend experiences to robust backend services and cloud infrastructure.

What You’ll Do

* Design and implement scalable, high-performance web applications end-to-end

* Be part of an intensive transformation to modern AI work methodology using the latest AI models.

* Architect backend services and APIs and build modern, responsive frontend applications.

* Be part of complex technical discussions with the ability to contribute a major part to the discussion and decisions.

* Own features from concept to production

* Optimize performance, reliability, and security across the stack as well as promote engineering best practices

What You Bring

* 5+ years of experience as a Full Stack Developer.

* Proven experience in development using AI as the main working tool.

* Proven experience with the relevant technologies and frameworks.

* Strong understanding of system design (experience with Chakra UI is an advantage), scalability, and cloud architecture

* Proven experience working with AWS in production environments

* Fluent in English and strong communication skills.

* You embrace change and learning on the go.

* Experience working in startup or fast-paced environments.

* Strong problem-solving skills and ownership mindset.

Our Client’s Tech Stack

* Full stack: Next.js, NestJS (Typescript)

* System design: ChakraUI

* Infrastructure: Kubernetes, Docker, CI/CD pipelines

* Database: SQL / NoSQL (depending on service)

* Cloud: AWS (Lambda, ECS/EKS, S3, RDS, etc.)

AI & Modern Engineering Expectations

Candidates must be proficient and up-to-date with the latest AI advancements, actively using AI-powered development tools (like Claude Code, Code Rabbit, or similar) to accelerate development, enhance code quality, and innovate product features where AI adds user value.

Nice to Have

* Experience with Spec-Driven-Development and methodologies to support full AI embracement

* Experience designing and developing microservices architecture.

* Experience with Python and Dash.

* Background in performance optimization and distributed systems

Responsibilities

• Develop and maintain product functionality across frontend, mobile, and backend
• Work with Node.js, React, Next.js, and Flutter
• Build and maintain functionality using PostgreSQL and Redis
• Take ownership of tasks and drive them from implementation to completion
• Understand how individual features fit into the product as a whole
• Collaborate directly with technical stakeholders on the client side
• Participate in technical discussions and contribute to implementation decisions
• Use AI-assisted development tools as part of the development workflow
• Work independently and proactively identify potential issues and improvements
• Collaborate with cross-functional team members throughout the development process

Requirements

• 3+ years of commercial software development experience
• Strong hands-on experience with Flutter
• Practical experience with Node.js
• Practical experience with React and Next.js
• Hands-on experience across the key technologies in the stack
• Experience working with PostgreSQL
• Practical experience with AI-assisted development tools such as Cursor, Claude Code, or similar
• Ability to work independently and take ownership of tasks
• Product-oriented mindset and end-to-end understanding of features
• Strong problem-solving skills
• Open and proactive communication style
• Comfortable communicating directly with the client
• Good English for direct communication with technical stakeholders

Nice to Have

• Experience with Redis
• Experience with Cloudflare
• Experience working in product-oriented teams
• Experience collaborating directly with international clients
• Interest in football

What We Value

• Look beyond individual tasks and understand the broader product context
• Can work independently without constant supervision
• Take responsibility for the final result, not just implementation
• Communicate openly and proactively
• Are comfortable discussing ideas and technical decisions directly with stakeholders
• Use AI tools thoughtfully to improve development speed and efficiency
• Adapt quickly and are comfortable working in a dynamic environment

Why Work With Us?

Not Meeting Every Skill?

Join Sigma Software’s IT Solutions Department and help shape the internal platforms and automation solutions that support thousands of daily business operations across the company. We are looking for a Principal level engineer who combines deep technical expertise with strong leadership and communication skills.

In this role, you will work in a complex enterprise environment, contributing to scalable Back-end-heavy Full Stack solutions, enterprise integrations, and AI-enabled engineering practices. 

The position combines hands-on development with architectural decision-making, mentoring, and cross-team collaboration.

We at Sigma Software value engineering excellence, continuous improvement, and modern development approaches. You will have the opportunity to influence technical strategy, drive automation initiatives, and help establish responsible AI-assisted development standards across projects.

CUSTOMER

The role is part of Sigma Software’s IT Solutions Department, which is responsible for building and evolving the company’s internal digital ecosystem. The department develops enterprise business applications, automation platforms, integrations, and productivity solutions that improve operational efficiency and employee experience across multiple business domains.

PROJECT

The project focuses on developing and evolving enterprise-scale internal platforms and automation systems used across Sigma Software. The environment includes interconnected services, enterprise integrations, process automation workflows, and AI-assisted engineering practices designed to support operational scalability and business efficiency.

You will contribute to architecture design, implementation of scalable Back-end solutions, enterprise integrations, and AI-enabled capabilities while collaborating closely with multiple technical and business teams.

Key Technologies: JavaScript, Node.js, React.js, REST API, GraphQL, Claude Code, Codex

Job Description

• Collaborate with stakeholders on solution discovery, technical design, estimations, and delivery planning
• Design and implement scalable and maintainable software solutions aligned with business and architectural goals
• Develop production-quality Back-end-focused solutions while contributing across the Full Stack when required
• Own features end-to-end from technical design to deployment and support
• Lead and mentor Middle and Senior engineers through technical guidance and peer reviews
• Act as a key technical point of contact across multiple teams and drive cross-team collaboration
• Design and implement enterprise integrations, automation workflows, and data processing solutions
• Contribute to AI-enabled engineering workflows and product capabilities
• Establish standards for responsible usage of AI coding assistants within the project
• Review AI-generated code for scalability, maintainability, security risks, and edge cases
• Ensure system reliability, scalability, and performance under growing business demands
• Translate business requirements into practical technical solutions delivering measurable value

Qualifications

• 7+ years of commercial software engineering experience with a strong Back-end focus
• Strong hands-on experience with JavaScript and Node.js
• Experience with React.js
• Solid experience designing and developing REST API and/or GraphQL solutions
• Hands-on experience using AI coding assistants such as Claude Code or Codex in daily development workflows
• Strong understanding of software architecture, design patterns, scalability, integrations, and risk management
• Experience working in enterprise environments with multiple stakeholders and distributed teams
• Ability and willingness to lead technical initiatives and mentor engineers
• Strong communication and stakeholder management skills
• Ability to balance technical and business priorities
• Experience working with incomplete or evolving requirements
• Upper-Intermediate English level or higher

WILL BE A PLUS

• Previous formal team leadership experience
• Experience building AI-enabled business solutions
• Experience with enterprise process automation platforms
• Experience defining governance standards for AI-assisted development
• Exposure to complex distributed enterprise systems

PERSONAL PROFILE

• Analytical mindset with strong systems thinking
• High level of ownership and accountability
• Proactive and communicative approach
• Result-oriented mindset focused on measurable outcomes
• Ability to work effectively in complex organizational environments
• Strong balance between technical depth and business understanding
• Comfortable making decisions in ambiguous situations