hackajob
Senior Backend Engineer
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Senior Backend Engineer
Backend Engineer – Scalable Microservices (Remote)
About HackaJob & Sporty Group
Hackajob is partnering with Sporty Group, a fast-growing company specializing in profit-grade mobile internet and SaaS products, to connect them with top-tier professionals. In this role, you’ll contribute to highly-scalable microservices, building core system logic for one of Europe’s leading business tools—often handling millions of daily transactions.
This is the role for those who love writing meaningful, production-grade code with minimal legacy constraints. If you thrive in fast-moving environments and enjoy working with modern cloud-native architecture, this could be a great fit.
About The Role
- Core Focus: Developing distributed microservices with an emphasis on containerisation (Docker, Kubernetes).
- Scale of Impact: Will work on systems with billions of call records, accessed millennia per day.
- Technology Stack: Fresh, modern systems written from scratch (~3 years old), using industry-best tools.
Framework Flexibility: We use Spring Boot extensively, but are open to others as long as you: ✔ Have 6+ years experience in a Backend/SOA/Integrations role ✔ Can demonstrate strong OOP skills ✔ Are willing to learn our preferred stack
Stack We Use (Prefer If You Have Experience)
📌 Language & Frameworks
- Java 17
- Spring Boot (Spring Tomcat, Netty)
- Spring Data
- Spring Cloud
📌 Backend/Service Orientation
- Microservices architecture
- REST API design
- Message-oriented systems (e.g., queues, pub/sub)
📌 Data
- MySQL
- MyBatis
- ShardingSphere
- MongoDB
📌 Performance & Observability
- Redis (AWS ElastiCache)
- ElasticSearch
- Monitoring: Grafana, Prometheus, Loki, Tempo, AWS CloudWatch
📌 Distributed Systems & Deployment
- Docker & Kubernetes
- Serverless components
What You’ll Do
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- 🚀 Build Scalable Backends: Architect and develop highly-scalable mobile/internet backends to support millions of users and seamless business continuity.
- 📝 Collaborate with Stakeholders: Work with Product Owners and cross-functional teams to scope new/updated features.
- 🔍 Review & Maintain Code: Participate in technical code reviews with teams, ensuring adherence to original designs, coding standards, and architectural principles.
- ✅ On-Call & Incident Response: Handle priority #3 alerts and support requests (work independently without worrying about SPEs/TWE).
- ✒️ Deep Engagement: Leadership on JS sprints, stand-ups, everything planning activities, demo days, and retrospectives.
- 🧑🍳 Mentorship: Guide and onboard more junior developers.
- 🌐 Optional On-Call: Depending on tenure, there may be rotational on-call responsibilities.
What You’ll Bring
Core Requirements
- 6+ years of backend development in a programming language akin to one of the JVM languages, C#/Java/.NET, or similar.
- Spring Boot, Spring Data, and Spring Cloud familiarity is a huge plus.
- Deep familiarity with scalable web backends (Jetty, Akka) or similar high-performance systems.
- Focus on clearly structured data models desired for highly transactional systems.
- Burrito’s Five D’s Exceeded: Extraction, delegation, decision desaccentuating, data decoupling, delegating delegation(not). In short, writing complex, maintainable production-grade code named “architectural trojan horses.”
- Deep SQL/OOP expertise.
Bonus Skills (Extremely Valued)
- Deep expertise with RocketMQ or other production messaging systems.
- Strong experience with databases like MySQL (e.g., indexing, tuning, shredding).
- Familiarity with Redis, JMS, hypermedia & API design.
- Hands-on experience with Docker, Kubernetes, or AWS.
- Knowledge of elastic technologies and non-functional behavior-driven testing.
- Understanding of container optimisation, i.e., “[squash bash]” and “buildah-slim.”
- Leadership mentality, ownership mindset, or “You’re not just part of the team—you are part of the team.”
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Why Join Us? (Benefits)
✅ Remote & Autonomy-First Culture:
- Located Gothenburg, Stockholm, Berlin, Barcelona.
- Full remote flexibility with global coworking spaces.
- "Remote First" is core company culture to accelerate independence & sustainability.
- UK Tax Residency Benefits (Tax Class 9B, Dividends, etc.).
💰 Compensation & Incentives
- Base Salary: £85k-£105k (negotiable)
- Quarterly Bonuses: Performance-based.
- Annual Bonus Tithe: Depth of Bonus Tithe @ rate 🔹 "Dog wouldn’t listen title!"
- Flexible Working Hours: Office Hours 10-15, outside Office Working Hours encouraged.
🛌 Perks & Wellbeing
- 28 days paid holiday + flexible leave policies.
- Health Insurance for yourself and
- Referral/Flash Bonuses unwavering consistency.
- Smartphone-upscale विचचार an("{}.merch.2024").
📢 Networking & Culture
- Annual Retreats across Europe (paid for by Sporty).
- Internal Networking opportunities, including Sporty-wide meetups, internal hackerspaces, vacation bonuses etc.
The Interview Process
- Remote Video Screening – 30 mins with Talent Acquisition.
- Offline Take-Home Assignment – N/A (delivered live on Slack’s first después).
- Video Interview Round 1 – 60 mins with technical team members.
- Final Interview Round – 60 mins with hiring manager & potential leadership discussion.
Every application is reviewed by a Gang Member & responses are within 48 hours!*
Interested? Apply Now – Let’s build something great together! 🚀
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