Johann Tienhaara

ConvergentIS

2025/11 - 2026/03 · Halifax, Nova Scotia (Calgary, Alberta)
DevOps Architext · Procurement / supply chain software

I spearheaded a disaster recovery review, and assembled an inventory and wrote a detailed procedure to recover from ground zero.

I created automation to bootstrap a cluster, streamlining application promotions to production, and reducing in-cluster disaster recovery time from days to minutes.

TealBook

2024/05 - 2025/11 · Halifax, Nova Scotia (Toronto, Ontario)
DevOps Team Lead · Procurement / supply chain software

• Wrote all customer security questionnaire responses
• Wrote Artificial Intelligence company policy
• Mitigated "subscription bomb" cyber-attack
• Spearheaded quarterly security reviews and account audits
• Led DevOps team, standups, 1-on-1s, mentoring, planning
• Built staging environment in 2 weeks, enabling release of a new product in 4 months
• Wrote 300 pull requests across 35 git repos in 1 year, reviewed more PRs

I spearheaded, hired, and led a consultant, implementing our disaster recovery plan. 8 months later, we reduced our disaster recovery time from weeks to 40 minutes, without increasing cloud costs.

By brainstorming with leadership and the team, I cut cloud costs by 10% ($120,000 / year), by eliminating wasteful expenses, and tuning Kubernetes resources.

TealBook narrowly avoided bankruptcy, so I felt compelled to move on, away from the most wonderful software team I've ever had the pleasure of working with. (Shortly after, two-thirds of the team was laid off.)

GBatteries Energy Canada Inc.

2021/09 - 2024/01 · Halifax, Nova Scotia (Ottawa, Ontario)
Software Architect and Software Team Lead · Scientific computing / battery research

• Introduced risk register and software roadmap, and guided team along its course
• Mentored ambitious developer in planning and estimation
• Mentored developers in DevOps (Kubernetes, Terraform, NATS Jetstream)

I joined GBatteries and interviewed all the software stakeholders to begin a risk register. I then began building a collaborative roadmap with the team, mentoring them in new concepts, technologies and processes (streaming, DevOps, secrets management, kanban, user stories, velocity, work breakdown structures, collaborative whiteboarding).

While leading the Software team, I also wrote code and CI/CD across 50 git repositories; on-prem and AWS applications; managed Kubernetes, Raspberry Pis, qemu VMs, Docker Swarm; wrote device drivers, IOT streaming, and web applications.

GBatteries lost a revenue stream in January 2024 and laid off half its staff.

Musaico Solutions Ltd. (Guardian Pty Ltd.)

2020/02 - 2021/09 · Halifax, Nova Scotia (Melbourne, Australia)
Solutions Architect and Team Lead · Personal safety application (mobile app + call centre web app)

• Restructured an undocumented, un-automated, un-version controlled software product comprising components from 3 contracting companies into 1 integrated, documented, robust, repeatably deployable end-to-end system, from zero to customer demo in 9 months.
• Conducted interviews to build team (mobile developer, QA, product owner).
• Mentored team in networking, cloud logging, authentication and authorization, security, privacy and confidentiality.
• Introduced product roadmap, formatted as a comic strip (!), which CEO showed to investors.

ABM Systems Ltd.

2012/03 - 2020/01 · Dartmouth, Nova Scotia, Canada
Software Developer · Point of sale software

• Replaced ABM's point of sale pricing engine, deployed to 200 sites, while maintaining backward compatibility and introducing automated testing.
• Wrote winning proposal for NS government RFP, Nova Scotia Indian Fuel Tax Exemption distributed system, deployed to 22 First Nations gas stations and to the NS government data centre.
• Wrote Nova Scotia Payments business analysis, covering payment and refund processes across 16 business groups across the provincial government, proposing process and technology improvements
• Documented ABM SOC 2 Type 2 compliance, managed audit with Grant Thornton auditors