Bastian Isensee

Software Engineer
Technical Consultant
Freelancer

Backend Engineer (Go) & Technical Consultant for Regulated Domains

Bastian Isensee is a backend engineer and technical consultant with over 12 years of experience building reliable software systems for high-stakes, regulated domains such as finance and trading. Clients value his ability to deliver maintainable solutions where correctness, performance, and auditability are critical to business success.

Bastian specializes in Golang and uses technologies like PostgreSQL, Kafka, REST, Docker and Kubernetes. He places strong emphasis on deeply understanding business requirements to ensure technical solutions are aligned with actual needs. Alongside hands-on development, he supports teams as a trusted advisor through architecture evaluations, thorough reviews, mentoring, and technical leadership.

Contact Bastian to discuss your specific software project needs.

Services Offered

Backend Development

System design and implementation, performance tuning, issue analysis and problem-solving, code reviews, testing, communication and documentation

Technical Consulting

Expert guidance on requirements engineering, architecture, maintainability and development processes

Training

Effective knowledge sharing and individual mentoring

Primary Tech Stack

Golang, PostgreSQL, Kafka, REST / WebSocket / RPC, Docker, Kubernetes, Linux, AWS, CI/CD - GitLab, Prometheus, Grafana

Experience

Börse Stuttgart Digital Exchange GmbH

Cryptocurrency Exchange

SSW Trading GmbH

Algorithmic Securities Trading

Werum IT Solutions GmbH

Manufacturing Execution Systems for the Pharma Industry

Recent Posts

Better Than Estimations

Relying on estimations in software projects is dangerous. Unfortunately, many projects keep doing it and often fail as a result. The underlying assumption is that developers are capable of estimating the unknown. However, I have never met a team that consistently produces reliable estimates.

May 4, 2024 4 min read

Better Than Estimations

Why Rely on Estimations?

One of the most common questions developers get asked is, ‘How long does it take?’ Building this new feature, fixing that annoying bug, or migrating a legacy application. Everything has a price, of course, and managers need to weigh cost against benefits. Most developers dread this question and don’t like giving estimations. Why? Because the odds are high, that their guess is completely wrong.

Apr 21, 2024 2 min read

Why Rely on Estimations?

Building a Simple Game in Golang

If you want to learn Golang or programming in general, then this tutorial is for you. We are going to look at how you can create a simple console game in Go.

Apr 14, 2024 1 min read

Building a Simple Game in Golang

The Biggest Risk for Developers

Working in IT is great. It stimulates your mind and creativity by solving problems. It gives you flexibility when working from home. On top of that, demand and pay are above average. But what if I told you that the typical IT lifestyle involves a decent amount of risk?

Apr 6, 2024 4 min read

The Biggest Risk for Developers

Building a REST API in Golang

REST APIs are one of the most common architecture patterns in today’s distributed software systems. Therefore, I want to give you an overview of essential REST concepts and illustrate them with an example API in Golang.

Mar 31, 2024 8 min read

Building a REST API in Golang