Senior Engineer
Change is a regulated European multi-asset investing and trading platform. It enables retail users to buy, sell, hold, and withdraw cryptocurrencies and trade CFDs on stocks, forex, indices, and commodities through its app and MetaTrader 5 integration.
Funding history
About Change
Change, operated by Change Securities B.V., is a Dutch-regulated fintech and Crypto-Asset Service Provider serving customers across the European Economic Area. Its multi-asset platform provides crypto investing alongside CFD trading on stocks, forex, indices, commodities, and crypto, with deposits, withdrawals, recurring crypto purchases, price alerts, and wallet withdrawals. It targets retail investors, including beginners and experienced traders, seeking a single mobile platform for regulated access to multiple financial markets.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You own one or two core domains end to end and ship measurable improvements to regulated, money-moving systems. You evaluate Kotlin and .NET architectures through prototypes and benchmarks, define agentic software development practices, and write clean, tested, observable code. You also collaborate with business, compliance, marketing, and infrastructure stakeholders while communicating architecture and constraints clearly.
Requirements
- 5+ years building production systems where correctness and uptime matter
- Strong expertise in either Kotlin, Spring Boot, and Kafka or .NET, C#, and ASP.NET Core
- Openness to work across both the modern JVM and .NET ecosystems
- Experience with AWS, EKS, observability, and infrastructure concepts
- Understanding of event-driven systems, idempotency, reconciliation, and distributed systems
- Ability to communicate architecture, boundaries, data flows, and constraints clearly
- Daily use of coding agents such as Codex, Cursor, Claude Code, or Aider
- Experience building or customising a real agentic workflow, tool, or automation used in practice
- Judgement about human oversight in regulated environments
- Strong written communication and design documentation skills
- Ability to give and receive direct feedback
Responsibilities
- Take ownership of one or two core domains end to end
- Ship measurable improvements to regulated, money-moving systems
- Contribute to the Kotlin versus .NET architectural evaluation
- Prototype, benchmark, and document architectural options
- Define and prove out the agentic software development lifecycle
- Use coding agents in design, review, testing, and incident response
- Write clean, well-tested, observable code
- Partner with business, compliance, marketing, and infrastructure functions
Benefits
- Hybrid work arrangement
- Travel to Athens and Estonia a few times a year
- Learning budget