Jobs

We are looking for a Middle/Senior Full-Stack (Node.js + React.js) Developer.

Required:

• At least 4+ years in commercial development;
• English — Intermediate or higher.

Backend:

• Node.js (4 years of commercial experience);
• TypeScript;
• Nest.js;
• MySQL/PgSQL;
• RMQ, Redis;
• SOLID, Patterns knowledge/experience.

Frontend:

• React.js (3 years of commercial experience);
• TypeScript;
• Redux/RTK/Mobx;
• Thunk/Saga;
• Hooks;
• SASS, Bootstrap, or something similar.

We offer:

• Maximum flexibility;
• Professional trainings, conferences and certifications;
• Corporate events and benefits;
• Professional literature;
• English courses;
• Discount program.

OBRIO is an IT company with Ukrainian roots inside Genesis business ecosystem. Our team consists of more than 250 talented professionals whose ambitions and striving for success help us build the best products on the market. We have offices in Kyiv and Warsaw.

We are developing Nebula — the biggest brand in the spiritual niche. Nebula has over 60 million users worldwide and has been ranked as the № 1 lifestyle app of the day in the Apple Store and Play Market in the USA, Canada, and Australia several times. Nebula is available on iOS, Android, and Web.

Our mission is to make people happier by improving the quality of their relationships.

Here are some details we would like to share with you:

• Nebula is #1 in its niche in terms of downloads and revenue targets;
• 60 million users worldwide;
• Users from 50+ countries;
• 4.8 — our average AppStore rating (with more than 215 thousand ratings).
• OBRIO’s achievements and team’s expertise were shared in Tier-1 international and Ukrainian media, organizations, and brands such asForbes Ukraine, TechCrunch, VECTOR, The Next Web, Tech.eu, Entrepreneur Media, Fast Company, AIN, IT Arena, MEGOGO, DOU, Projector Institute.
• OBRIO — a Forbes-recognized lovemark brand with the highest eNPS.
   

Who are we looking for?

To strengthen our team, we are looking for a Lead Back-End Engineer to join our Retention Team and take ownership of the backend strategy, architecture, and performance for user engagement and retention solutions. This is a mission-critical role with direct impact on product performance and user lifetime value.
 

Your impact:

• Provide strong technical leadership and mentorship to backend engineers;
• Design, build, and scale backend architecture focused on retention-related services;
• Ensure high code quality and maintainability through thorough code reviews and technical guidance;
• Collaborate closely with product managers, QA engineers, data analysts, and DevOps to deliver integrated, cross-functional solutions;
• Make informed technology decisions to optimize system performance and scalability;
• Implement and champion CI/CD best practices to improve development efficiency;
• Participate actively in sprint planning and drive sound, strategic technical decisions.
   

About you

• You have 4+ years of backend development experience with a proven track record of leadership
• You are highly skilled in Node.js, PostgreSQL, Redis, and RabbitMQ;
• You excel at collaborating with teams and motivating engineers to deliver their best work;
• You have a proactive, solution-oriented mindset and can navigate ambiguity effectively.

Nice-to-Have: Experience with Grafana, ELK stack, MongoDB, and Go is a plus.
 

 Why OBRIO is the best place to work?

• Unleash Your Ambitions: Our company was built by ambitious people who never settle for less. By joining OBRIO, you’ll have the chance to unleash your own ambitions and achieve your career dreams.
• We don’t just give you opportunities for growth and development, we give you maximum autonomy and believe we can’t do without you and your active thinking.
• Collaborate in a Team Environment: We believe that success is a team effort. When you join OBRIO, you’ll have the chance to collaborate with talented individuals who share your passion for achieving outstanding results.
• At OBRIO, we’ve gathered influential experts, all of whom are open to sharing their knowledge and ready to help solve issues based on their experience. This is the company where you can quickly reach your potential and advance your career.
   

Our benefits:

• Work from the comfort of your home or from one of our offices in Kyiv or Warsaw. The choice is yours!
• Enjoy 20 annual vacation days and unlimited sick leave, all covered by the company;
• Don’t worry about getting the right equipment, we’ve got you covered if necessary;
• Stay healthy with access to a corporate doctor online, and health insurance options in Ukraine or a fixed amount towards insurance abroad after your probation period;
• Keep learning with our extensive corporate library, internal online meetings, and lectures;
• Grow your skills with our training compensation program;
• Take advantage of our supportive corporate culture, including assistance with relocation, advice on legal stay abroad, housing support, and help for third-country nationals;
• Have fun with our online events and team-building activities
   

Here’s what our hiring journey looks like: Initial Screening ➡️ Team Interview ➡️ Skills Assessment ➡️ Final Check ➡️ Job Offer.
 

Let’s team up and reach for the stars together!

What is the project idea?

The project was founded back in 2014 with the goal of connecting private and government universities with regular people like we are. You have a variety of auditoriums, gyms, classrooms, and other venue options available for community use – schedule facility uses and manage requests from the community all in one place.

Just imagine that you’re a football player and you can rent a football field at Harvard to play with your friends. Amazing, right?

What exciting things is the product doing for the community?

The product is transforming the way public and private spaces are discovered, reserved, and used across communities – all online and accessible anywhere.

Requirements and responsibilities

Hard skills

– 3+ years of working experience using Node.js;
– Hands-on experience with MongoDB;
– Experience with Serverless and Lambda functions (pet-project also works);
– Understanding NoSQL (MongoDB, relations, triggers, etc.);
– Experience working with Jira and Confluence (understanding what is A/C, DoD, and Scrum ceremonies);
– Experience in building schemas, validations, and models using Mongoose in Node.js applications;
– Upper-intermediate or higher level of English.
Working hours:
⏰ Important to have the ability to stay till 8-9 pm CET, at least 2-3 times per week.

It would be a plus:

– Experience with other programming languages;
– Experience with MongoAtlas;
– Degree in a technical field.

Responsibilities

– Development of the web application with search functionality;
– Development of the Client application’s structure;
– Direct communication with the development team and customers;
– Participation in sprint planning and task evaluation;
– Ensuring the code tests coverage.

How many stages of the interview are there?

– Interview with the Recruiter – up to 30 min.;
– Interview with PM – up to 30 min.;
– Technical interview – up to 1 hour;
– Interview with the client – up to 1 hour.

We offer

01

Work vibe

• Flexible full-time/part-time hours
• No micromanagement—time logging is for accounting only
• High-quality equipment (MacBook or your own device)
• Dynamic, low-bureaucracy environment
• Team events, swag, and a great crew to hang with
  
  02
• Holidays and leaves
• 20 days of paid annual vacation;
• 15 days of paid sick leaves;
• Possibility to use vacation during probation;
• Days off on all government holidays.
  
  03
• Education
• $100 annual education allowance
• Mentorship program—learn or lead
• English lessons with biannual reviews
• Certification cost reimbursement
• Free access to Udemy courses on request
  
  04
• Perks
• Social package: medical insurance, sports compensation, or psychological training
• IT Club Loyalty card (Lviv IT Cluster)
• No overtime—work-life balance matters
• Transparent payments in EUR/USD, on time every month
• Assistance with military reservation procedure

We’re building Firesale — a platform where sellers create AI-powered listings by simply recording a video. Buyers see beautiful, interactive posts generated automatically. It’s fast, visual, and redefines how products are presented and discovered.

Everything is built from scratch with a modular, service-oriented architecture using NestJS and NextJS.

Watch the intro video (1 min)
📺 https://youtu.be/hU2vJU8fo0w?feature=shared

The ideal candidate profile includes:

• 6+ years of commercial software engineering experience
• 3+ years in a senior-level position
• 3+ years of hands-on backend development experience (NestJS, modular microservices)
• 3+ years of hands-on frontend development experience (React, Next.js)
• Strong grasp of DDD, Clean Architecture, KISS
• Ability to build and own complete features from UI to backend integration
• Self-directed, detail-oriented, and committed to code quality

Nice to have:

• Familiarity with NATS
• Exposure to event-driven systems
• Exposure to CI/CD pipelines (GitHub Actions, Docker)

Role & responsibilities:

• Initial focus on frontend: building key UI flows, interactions, and responsive forms
• Integrate with backend services via REST and SSE
• Help define and maintain architectural consistency and code quality
• Collaborate directly with the founder/CTO, shaping the product from day one

What we offer:

• Modern architecture: no legacy, no shortcuts, full control
• Async collaboration, flexible hours, remote-first
• Direct impact: everything you build will ship to real users
• Fast feedback loop, deep technical discussions, and strong product/tech alignment
• Opportunity to grow into a core engineering or lead role

Backend Developer (NestJS + Web3)

🚀 Alton is building a cutting-edge DeFi & SocialFi platform on the TON blockchain. We are looking for a Backend Developer to help us scale our infrastructure and build the backend logic behind our Web3 platform.

🔧 Responsibilities

• Develop and maintain backend services using NestJS
• Work with PostgreSQL and Redis for core data storage and caching
• Help integrate ClickHouse for advanced analytics (coming soon)
• Collaborate with the frontend, smart contract, and data teams
• Design scalable APIs and systems for the DEX and other DeFi products

✅ Requirements

• 1.5+ years of experience in backend development with NestJS
• Solid experience with PostgreSQL and Redis
• Understanding of scalable API architecture and microservices
• Basic knowledge of Web3 and smart contract interactions
• Familiarity with working in TypeScript-based environments

🌐 Nice to have

• Experience or understanding of:
  • TON blockchain, particularly working with blueprints and ton/core
  • ClickHouse or similar analytical DBs
  • Rust, Tokio, or Axum (bonus for data engineers)
  • Web3 libraries and blockchain indexing tools

💎 What we offer

• Remote-first and flexible working conditions
• Work with a passionate, agile team aiming to build a Web3 unicorn
• Deep involvement in TON and DeFi ecosystems
• Token Option plan (early contributor allocation)
• Opportunity to shape technical architecture and backend design from early stages

📍 Location

Remote / Hybrid (negotiable)

💬 Ready to build the future of DeFi?

Apply on Djinni or drop us a message — we’d love to talk!

We're building cutting-edge AI-driven experiences that redefine industry standards in online gaming. As our Backend Engineer, you'll drive technical initiatives across teams to build scalable web applications, in-app solutions, and integrations that power our innovative gaming platform.

A must have for this job is a bachelors degree in a technical domain (preferably Computer Science) and 2 years of full-time experience with backend development (at least one year with Node.js).

## What You'll Build

- Highly-available and performant gaming applications

- Scalable backend systems for global audiences

- MVPs and production-ready solutions for online poker games

- Integration systems with various service providers

- Robust microservices architecture

## Required Skills

- 3+ years backend development

- Advanced TypeScript/JavaScript knowledge

- REST APIs, GraphQL, gRPC, and WebSockets

- Testing frameworks (Jest)

- Databases (PostgreSQL, MongoDB, DynamoDB)

- Caching and queues (Redis, RabbitMQ, Kafka)

- High-load and concurrent systems

- Microservices and distributed systems

- Security best practices

## Nice to Have
 

- Experience with NestJS

- DevOps and CI/CD pipelines

- Cloud platform expertise (AWS, Cloudflare)

- Background in gaming or high-concurrency applications

## About Us
 

AceGuardian at A5 Labs combines gaming expertise with AI technology to revolutionize both gaming and real-world problem-solving. Our team focuses on building advanced AI agents through reinforcement learning, game-solving, fine-tuning, and planning, tackling challenges like anti-cheat detection and optimal gameplay.

## What We Offer

- Remote-first environment

- Opportunity to work on innovative AI projects

- Collaboration with experts in AI and game development

- Flexible work environment

- Career growth in a fast-growing company

- Supportive and dynamic team
 

Ready to help build the future of AI-powered gaming technology? Join us in creating resilient, scalable systems that power the next generation of online gaming experiences. We'd love to hear from you!

We are building a cutting-edge financial white-label platform that empowers businesses and individuals to manage their finances seamlessly. Our platform integrates state-of-the-art technology to offer:

• A neo-banking experience with mobile apps operating over robust payment gateways.
• Open and closed-loop mobile wallets.
• Embedded KYC modules for user data collection and validation.
• Virtual card support with payment capabilities at physical and online merchants.
• Advanced business tools: team management, invoicing, QR-code payments, and real-time analytics.
• A currency exchange feature with real-world rate integration.

Our system is designed with scalability and performance in mind, employing a microservices architecture powered by NestJS, RabbitMQ, and PostgreSQL, with Kubernetes and Docker as key enablers for flexible deployment.

We are looking for a highly skilled Senior Back-End Developer to join our team and contribute to the next phase of our product development. 

If you are passionate about crafting high-quality, scalable systems and enjoy working in a fast-paced, innovative environment, we want to hear from you!

Your Responsibilities

• Design, develop, and optimize back-end services using TypeScript and NestJS within a microservices architecture.
• Build and integrate secure APIs for payment gateways, KYC modules, and business functionalities.
• Collaborate closely with cross-functional teams, including front-end, mobile, and DevOps, to ensure seamless integration and high performance.
• Optimize database design and queries for PostgreSQL to handle high transaction volumes.
• Implement robust messaging solutions using RabbitMQ.
• Ensure the security and compliance of the system with financial industry standards.
• Contribute to architectural decisions and guide best practices for back-end development.

Your Skills and Experience

• 4+ years of professional experience in back-end development, with a focus on TypeScript and NestJS.
• Strong expertise in microservices architecture and message brokers (RabbitMQ or similar).
• Advanced knowledge of relational databases, particularly PostgreSQL (optimization, indexing, and migrations).
• Experience with containerization and orchestration tools: Docker and Kubernetes.
• A solid understanding of API security, encryption, and authentication mechanisms (OAuth2, JWT).
• Proven track record of delivering high-performance, scalable systems in a production environment.
• Familiarity with CI/CD pipelines and cloud platforms (AWS, Azure, or GCP) is a plus.
• Excellent problem-solving skills and the ability to mentor junior team members.

What We Offer

• A unique opportunity to work on a high-impact, innovative financial platform.
• Competitive salary and performance-based bonuses.
• Flexible working hours and remote-first culture.
• Opportunities for professional growth and technical leadership.
• A collaborative and inclusive team environment.

Join us in reshaping the future of financial technology. Apply now to make your mark!

VARTEQ is a top technology solutions provider, crafting cutting-edge digital experiences for businesses in diverse industries. Our portfolio includes web and mobile app development, e-commerce solutions, and custom software tailored to each client’s unique needs.

About the role:

Our Client is a leading provider of payment solutions and financial technology services, dedicated to empowering businesses with innovative solutions that streamline transactions.

We are seeking a skilled Node.js Developer to join our technology team. In this role, you will be responsible for upgrading, optimizing, and adding new features to our current web applications, ensuring they remain efficient, scalable, and secure.

Requirements:

• 3+ years of experience in Object-Oriented Programming
• 2+ years of experience with Node.js in commercial projects.
• Familiar with web standards and modern XHTML/HTML/HTML5/CSS.
• Proven experience in database design and writing optimized SQL queries.
• 2+ years of experience with Linux/Ubuntu.
• 1+ years of experience with AWS or other cloud platforms.
• Knowledge of SOAP, REST, or similar web services.
• Previous experience working in Agile teams.
• Strong ability to explain technical concepts to non-technical users.
• English proficiency: Upper Intermediate.

Preferred Qualifications:

• Experience with PostgreSQL database design and basic administration.
• Knowledge of unit testing practices.
• Experience using Git for source control.

Responsibilities:

• Develop and maintain web applications using Node.js.
• Manage and optimize relational databases, particularly PostgreSQL.
• Collaborate with cross-functional teams to define and implement new features.
• Maintain, optimize, and debug code to improve application performance.
• Use Linux command-line tools for server management, deployment, and automation tasks.
• Diagnose and resolve system issues using Linux command-line tools.

What we offer:

• Dynamic environment with a low level of bureaucracy
• Challenging tasks
• Education path: boost your skills and knowledge with our regular internal events (trainings, workshops, etc), language courses, and company-paid certifications
• Growth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally
• Friendly team buildings, cool corporate events
• Paid vacation, holidays, and sick leaves

Our Customer:

The company is a global leader in Virtual and Augmented Advertising and Product Placement, with over a decade of experience in the industry. It partners with TV stations and producers worldwide to deliver impactful, AI-enhanced advertising solutions that generate new revenue and elevate brand visibility. Initially focused on traditional advertising, the company now specializes in integrating virtual reality and AI into television advertising. The company's technology is used in live tournaments and annual non-sports events.
 

Responsibilities:

• Develop and maintain the backend pipeline to monitor, synchronize, and manipulate data workflows over the cloud and on-premise;
• Integrate and manage modules written both in C++ and Node.js;
• Implement a complex metadata system over AWS, including S3 security access and acceleration;
• Design and deploy backend architecture (NodeJs) to manage data allocation and pipeline control;
• Create and maintain a dashboard to monitor pipeline status and performance.
   

Required experience and skills:

• 5+ years of experience in backend development;
• Experience with Node.js;
• Experience with AWS;
• Proficiency in Client-Server architecture design at scale;
• English - Upper-Intermediate.

Would be a plus:

• Experience with database management, particularly MySQL;
• Experience with C++ real time programming;
• Experience with sports broadcasting and AR technology.

Working conditions:

• Remote work;
• 5-day working week, 8-hour working day, flexible schedule;
• All public holidays are days off;
• Vacation and sick leave are covered by the company.

• 
  One of the biggest UK rail network companies operating with rail infrastructure and asset management has a need to develop and support enterprise-level information systems.
  
  Align the data science initiatives with the overall business goals. This could range from improving customer satisfaction, enhancing operational efficiency, to driving sales growth.

• Responsibilities:

  Software development
  Unit/integration testing
  Azure environment configuration
  Customer communications

• Mandatory Skills Description:

  3+ years of experience
  Azure App service implementation and deployment.
  Fastapi and asyncio (asynchronous programming)
  Auth (OAuth, JWT, Microsoft authentication flow).
  Docs (OpenAPI, Swagger).
  SQL Alchemy or alternative DB integration libraries.
  Python/Pytest
  JS/Node
  SQL
  GIT and collaborative workflows
  Bash, shell scripting.

• Nice-to-Have Skills Description:

  Azure Container Management (docker, container registries, CI/CD to app services).
  CI/CD approaches
  Security across Azure (key vault, app service configuration, auth).
  Virtual Machine deployment
  Familiarity with storage accounts and their components

We are looking for a Full-Stack React & Node.js Product Developer for Estonian startup Snoika - AI Search Engine Visibility and Optimization SaaS.

Snoika is the results-driven AI Marketing Engine that guarantees 5+ qualified inbound leads per week for B2B companies while making them visible in both AI and traditional search engines. Our platform fuses cutting-edge knowledge-graph analytics, large-language-model (LLM) optimization, and high-quality content pipelines to outrank expensive legacy SEO and GEO agencies at a fraction of the cost.

Why this role rocks

As one of the first Full-Stack Developers in our Product Guild, you'll turn AI/ML research and growth experiments into polished, revenue-generating product features that land in customers' hands every one-week sprint. You'll join a team whose members have built solutions for NASA, Google, Microsoft, Bosch and dozens of F2000 enterprises.

What you'll build & ship

• Customer Console – real-time dashboards that visualize share-of-voice, entity-gap heatmaps, and lead flow.
• Content Ops Studio – A React-based interface for editing and managing AI-generated content, integrating AI drafting, human SEO review, and publishing pipelines
• API Layer – Node.js/TypeScript (Express / Nest) services that expose our Knowledge-Graph and Q&A scoring engines.
• Integration hooks – webhooks & SDKs (GraphQL/REST) ​​for CRMs, CMSs, and data warehouses.
• Security & Compliance – implement auth (OAuth 2, JWT), rate-limiting, and privacy-first data flows.
• Dev-Experience – CI/CD (GitHub Actions), automated tests, and feature flags so we can release multiple times per day.

The toolkit you'll use

• Front-end: React 18 / Next.js, Vite, Tailwind, Materia UI, React-Query, D3 or Recharts.
• Back-end: Node.js 20 +, TypeScript, Express or NestJS, TypeOrm or Postgres, Redis, Langchain, RabbitMQ Pub/Sub.
• Cloud: AWS, Kubernetes.
• CMS: Strapi
• Quality: Jest, Cypress,  Datadog.
• Collaboration: ClickUp+Scrum, Figma.

You're a great fit if you…

• Have 2  – 5+ years building production React and Node.js applications (TypeScript a must).
• Own features end-to-end: UX, API, infrastructure, deployment, monitoring.
• Love data-heavy UIs and know your way around charts, virtualized tables, and WebSockets.
• Can design REST/GraphQL APIs that serve thousands of req/min with single-digit latency.
• Understand CI/CD, infra-as-code, and cloud-native patterns (12-factor), SSR/SSG/ISR.
• Thrive in startup ambiguity, deliver in short sprints, and iterate on customer feedback.
• Communicate clearly in English; bonus for experience with SEO, analytics, or AI/LLM/RAG pipelines.

What we offer

• Impact from day one  - the components you ship directly increase leads and revenue for high-growth SaaS, fintech, and deep-tech brands.
• Elite peer group – collaborate with PhDs and operators who've scaled technologies at global brands
• Competitive salary and opportunity for career growth.
• Remote flexibility – async-first culture; we measure outcomes, not hours.
• Transparent KPIs – see exactly how your work moves the needle on client conversions.

If you're excited to push the boundaries of AI Search Engine Visibility and Optimization and want to help shape the future of marketing technology,  we want to hear from you!

Location: Remote

Type: Full-time

Company: Techlexity.com

 

About Us:

Techlexity is an outsource development company focused on building modern, scalable web and mobile products for international clients. We’re looking for a motivated Junior Strong Backend Developer who already has hands-on experience with real commercial projects and is ready to grow fast within a senior-led team.

This is a great opportunity to sharpen your backend skills while working on real client products and internal tools using modern backend tech.

Tech Stack You’ll Work With:

• Node.js / NestJS / hono.dev
• TypeScript
• PostgreSQL / Prisma ORM
• Redis
• AWS / S3 / Lambda / CloudWatch
• RabbitMQ (will be a plus)
• Docker, GitHub, CI/CD pipelines

What You’ll Do:

• Help develop backend features using NestJS and TypeScript
• Integrate with third-party APIs and cloud platforms (mostly AWS)
• Work with Redis for caching and queueing
• Maintain and evolve backend modules and services
• Collaborate with frontend developers and PMs in Agile flow
• Participate in code reviews and team discussions
• Learn and grow quickly under mentorship

Requirements:

• 0.5+ years of experience in commercial backend development (internship/freelance counts if real-world)
• Solid knowledge of Node.js, TypeScript, and NestJS
• Understanding of relational databases (PostgreSQL preferred)
• Familiarity with Redis and basic caching principles
• Basic knowledge of AWS services or eagerness to learn
• Git & team workflow understanding
• Responsible attitude, attention to detail, willingness to grow
• English: Intermediate (reading docs, daily communication)

Nice to Have:

• Experience with Prisma ORM, RabbitMQ, or Docker
• Previous work in outsource teams or for international clients
• Understanding of REST API design and microservice architecture basics

What We Offer:

• Projects with real users and modern architecture
• A strong engineering team ready to mentor and support
• Fully remote work with flexible hours
• Clear growth path to Middle developer
• Competitive compensation based on your level

We’re looking for a Backend Engineer to join our team and help power a platform for online courses with flexible payment options — including one-time payments and subscriptions. If you’re strong with Node.js, TypeScript, and Stripe integrations, and know your way around clean APIs and relational databases, let’s talk.

What You’ll Be Working On

You’ll be building and maintaining a backend that supports:

• A modern online course platform
• Subscription-based and one-time payment flows via Stripe
• A robust data layer for managing users, payments, and course content

What We’re Looking For

🔧 Technical Skills

• Strong Node.js and TypeScript experience
• Solid understanding of the NestJS framework
• Hands-on experience integrating and managing Stripe payments (subscriptions & one-time)
• Proficiency with Prisma ORM for database access
• Familiarity with PostgreSQL and relational database design best practices

You’re a Great Fit If You…

• Have launched or supported backend systems in production environments
• Understand clean API architecture and modular code organization
• Are confident navigating payment flows, webhooks, and Stripe APIs
• Communicate clearly and work well in a remote, collaborative team

What We Offer

🌍 100% remote
🎓 A real-world product that helps people access education
💳 Direct impact on core payment and access functionality
💻 A modern tech stack and product you’ll be proud to ship

We’re building the future of marketing - one AI agent at a time.

Join us as a Senior Software Engineer to help architect and deliver intelligent marketing automation tools powered by Anthropic platform, and other cutting-edge LLMs. This isn’t your typical API-wrangling gig. You’ll be working on a product that acts like a real teammate: handling campaigns, messaging, and ops across few platforms, and beyond.

🔧 What You’ll Be Working On

• AI Workflows: Design and implement autonomous workflows using Anthropic APIs (e.g. Claude, GPT-4o) to handle real marketing tasks, not just toy examples.
• Tool Integration: Build seamless API integrations
• LLM Ops: Architect prompt management, context injection, tool-use orchestration, and response validation pipelines.
• Autonomy & Reliability: Build smart retries, memory/context chaining, fallback strategies, and a modular codebase that scales.
• UX for Ops: Collaborate with designers to deliver powerful yet intuitive internal tooling for marketers.

⚙️ Our Stack

• Language: TypeScript (Node.js)
• Frontend: React Router v7
• AI/LLM: Anthropic (Claude)
• Infra: Docker, Temporal, Postgres
• Dev Experience: CI/CD, GitHub Actions

✅ You’re a Great Fit If You…

• Have 5+ years of experience in backend or fullstack development
• Use AI coding assistants every day
• Have shipped production apps using OpenAI, Claude, or similar LLM APIs
• Know your way around API integrations (REST, webhooks, OAuth flows)
• Understand prompt engineering, context windows, and system message structuring
• Are pragmatic, autonomous, and care deeply about product outcomes
• Write clean, maintainable TypeScript and love debugging tricky workflows

💡 Bonus Points

• Experience with agentic workflows, RAG pipelines
• Worked in martech, e-commerce, or SaaS tools
• Familiarity with memory management across sessions (e.g. vector DBs, embeddings)
• Obsession with great internal tools or developer experience

🌍 About Us

We’re a small, senior team building the next generation of vertical AI agents- specialized coworkers that deeply understand your workflow and do real work, not just chat. We move fast, cut through fluff, and are backed by experienced operators who know how to build great software and businesses.

 About Us
We are a San Francisco and Kyiv-based FinTech startup revolutionizing cryptocurrency investing. We’re currently building a cross-chain Modular Naming Service (MNS) — an identity and naming infrastructure powered by LayerZero, Web3, and the Aptos framework. Our mission is to simplify digital identity across blockchains.
 

About the Role
As a Back End Developer  you’ll work on backend systems powering our dApp, enabling seamless cross-chain identity, wallet integrations, and decentralized finance features. You’ll have the opportunity to contribute to both foundational infrastructure and product-level innovation — including future AI/ML enhancements.

Responsibilities

• Design, develop, and maintain back-end services for our cross-chain identity platform
• Integrate smart contracts and blockchain SDKs (Ethereum, Aptos, etc.)
• Collaborate with product and engineering teams to design scalable APIs (GraphQL, REST)
• Work with AWS infrastructure, CI/CD pipelines, and containerized deployments
• Research and prototype AI/ML integrations (e.g. prompt-wrapped queries to LLMs, self-hosted models)
• Stay informed on latest Web3 and blockchain standards (e.g. improvement proposals, ZK tech, DID)
• Write clean, maintainable, well-documented code with a strong emphasis on testing and performance
   

Requirements

• 3+ years of experience as a Back End or Full Stack Developer
• Strong knowledge of TypeScript and Node.js
• Experience with SQL or NoSQL databases
• DevOps skills, especially with Docker, AWS, and Terraform
• Familiarity with Ethereum, smart contracts, Web3, and DeFi
• Exposure to LayerZero and/or Aptos is a strong plus
• Experience with large-scale applications, system design, and scalable APIs
• Understanding of data structures, algorithms, and OOP
• Bonus: Experience with AI/ML, prompt engineering, or LLM integration
• English: Upper-intermediate level
   

Tech Stack

• Languages & Frameworks: Node.js, TypeScript, ExpressJS, Apollo GraphQL
• Databases: Firestore, MySQL
• Infrastructure: AWS, Docker, GitHub Actions
• Blockchain: Ethereum, Aptos, LayerZero
• AI/ML: LLMs (OpenAI, custom wrapped queries), with plans for self-hosted models
• Tools: GitHub, Jira, Confluence
   

Salary: $2,500 – $3,000 USD/month depending on experience