Senior Software Engineer (CALC engine)

Romania·Cluj-NapocaFull-timesenior

Software EngineerSoftware Engineering

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Overview

Aera Technology is the Decision Intelligence company. We deliver innovation and services that enable enterprises to operate sustainably, intelligently, and efficiently.

Technical Tools

anthropicjavaperformance-optimization

Aera Technology is the Decision Intelligence company. We deliver innovation and services that enable enterprises to operate sustainably, intelligently, and efficiently. Our platform, Aera Decision Cloud™, integrates with your existing systems to digitize, augment, and automate decisions in real time. Aera helps enterprises around the world transform decision making – delivering millions of recommendations that have resulted in significant revenue gains and cost savings for some of the world’s best-known brands.

The Senior Software Engineer (CALC engine) is a specialised role working on a complex Java based high-performance OLAP engine. Our engine is a multi-dimensional calculation engine with its own modelling language. The model declaration is dynamically compiled into efficient runtime objects.

We use AI-driven development innovation a little differently on the engine because the complexity of the code is often beyond what the AI tooling is capable of. That said, Claude Code is a major part of our lifecycle and is used to focus more efforts on the key areas that drive customer value.

The successful candidate will be working right in the core of the engine, where correctness and quality are as important as calculation performance.

Work closely with the product team to codify design decisions into executable criteria.

Collaboratively design and implement high-performance, low latency calculation engine code .

Communicate complex technical concepts clearly and effectively to team members and stakeholders.

Advocate for correctness-first approaches and foster a culture where quality is paramount.

8+ years of experience in backend software development.

Either:

Strong Core Java skills: threading, allocation & garbage collection, performance tuning.
Strong domain knowledge in database engine / Compiler design / Investment bank Front office
Experience writing low latency Java.
Experience of language design.
Understanding of how the JVM works.
Familiarity with working with AI tools such as Claude Code.

Prior experience building planning software

Likely (but not exclusively) to have worked in one of the following industry:

Database engines (not database implementations)
Low latency front office investment bank
Compilers

Basic understanding of Spring.
Knowledge of Multi dimensional modeling.
Knowledge of Lambda Architecture (https://en.wikipedia.org/wiki/Lambda_architecture)