HubMub
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AllCares

Senior Backend Engineer

AllCares
Ukraine · Full-time · Mid-Senior
About Us

Scrambly is the most rapidly growing Italy-based tech startup operating in the performance marketing and rewarded advertising space. Our platform helps users discover and test new apps, games, and services - and get rewarded for it. With millions of installs, we're focused on scaling our mobile product and building a seamless user experience.

Now we are looking for a Senior Backend Engineer to join the team building the core systems behind Scrambly. In this role, you will be solving complex scalability challenges for a platform serving millions of users globally.

Your focus will be on writing robust, high-performance code and bridging the gap between product requirements and technical reality. You will work within a modern tech stack to ensure our systems remain fast, reliable, and easy to maintain as we grow.

You Will Focus On

  • Designing and building high-performance services.
  • Architecting scalable and maintainable backend systems.
  • Mentoring engineers and elevating code quality standards.
  • Identifying bottlenecks and optimizing system performance.
  • Collaborating with DevOps to streamline infrastructure and deployments.
  • Bridging the gap between complex technical constraints and product goals.

Responsibilities

  • Design & Implementation:
    • Design, build, and maintain high-performance, scalable backend services and APIs using Node.js (NestJS).
    • Write clean, maintainable, and testable code that serves as a benchmark for the team.
    • Ensure seamless integration between backend services and frontend applications.
  • Architecture & Technical Strategy:
    • Propose and implement architectural improvements for core systems.
    • Design complex features with a focus on long-term scalability, extensibility, and maintainability.
    • Apply best practices for distributed systems and RESTful API design.
  • Mentorship & Code Quality:
    • Champion high code quality and engineering best practices across the team.
    • Mentor other engineers through constructive code reviews, technical guidance, and pair programming.
    • Foster a culture of technical curiosity and continuous improvement.
  • Performance & Infrastructure:
    • Monitor system performance, identify bottlenecks, and proactively resolve reliability issues.
    • Collaborate with DevOps to ensure smooth CI/CD pipelines, deployments, and infrastructure reliability.
    • Work with containerization and orchestration tools to manage application lifecycles.
  • Cross-functional Collaboration:
    • Work closely with Product, Design, Frontend, and QA teams to deliver high-quality features.
    • Translate product requirements into robust technical specifications.
    • Communicate technical constraints and trade-offs clearly to non-technical stakeholders.
Requirements

  • Experience: 5+ years of software engineering experience, with a strong focus on backend development.
  • Tech Stack: Strong proficiency in Node.js and modern frameworks like NestJS.
  • System Design: Excellent system design skills and a solid understanding of backend architecture, RESTful APIs, and distributed systems.
  • Infrastructure: Experience with cloud platforms (GCP preferred; AWS or Azure acceptable), containerization (Docker), and orchestration/IaC (Kubernetes, Terraform, Helm).
  • Databases & Messaging: Proficiency with relational (e.g., PostgreSQL), NoSQL (e.g., Redis) databases, and message queues (e.g., RabbitMQ, GCP Pub/Sub, Redis Pub/Sub).
  • Collaboration: Strong communication and collaboration skills, comfortable working in a fast-paced team environment.
  • Huge Plus:
    • Scale: Experience in a B2C startup that has scaled to millions of users.
    • Additional Stack: Basic proficiency in Go; able to read, write, and maintain basic Go services without starting to learn from scratch.
    • Frontend Autonomy: Hands-on experience with React, capable of implementing basic UI features or internal tools independently.
We Offer

  • Work on systems where performance optimizations translate to immediate user impact for millions of users
  • A culture of code reviews, knowledge sharing, and mentorship where the best idea wins
  • A fast-paced environment where your code quickly translates into real user value
  • We value the stability and value of what you ship, not just the number of lines of code
  • Full-time & fully remote position
  • 15 days of paid vacation days
  • 5 days of paid days off
  • 5 days of paid sick leave
  • Maternity/Paternity leave
  • National holidays by the country of your stay
  • An annual allowance of $100 for self-improvement activities

Key Skills

Ranked by relevance

containerization devops redis gcp message queues product design restful apis kubernetes postgresql terraform rabbitmq docker react nosql cloud cicd aws ui
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Posted
Jan 16, 2026
Type
Full-time
Level
Mid-Senior
Location
Ukraine
Company
AllCares

Industries

Human Resources Services

Categories

Engineering Information Technology

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