Tech Leadership with Fexingo: Engineering Managers, CTOs, and Technical Leadership Conversations

Every engineering leader eventually faces the build-versus-buy decision. In this episode, Lucas and Luna unpack a concrete case: a mid-stage fintech CTO who set up a lightweight internal platform team that turned the build-versus-buy question on its head. Instead of choosing between buying an off-the-shelf vendor product or building a custom solution from scratch, the team built a reusable interna...

Episode 53 of Tech Leadership with Fexingo explores a radical experiment: one CTO at a mid-sized SaaS company banned all recurring meetings for two weeks. Lucas and Luna break down the setup, the surprising outcomes—engineering velocity up 40%, but cross-team coordination suffered—and what the CTO kept permanently. They discuss the role of async documentation, the hidden cost of calendar clutter,...

In this episode of Tech Leadership with Fexingo, Lucas and Luna unpack the under-discussed middle ground between building internal tools and buying off-the-shelf software. They explore how one CTO at a mid-stage SaaS company avoided the 'buy regret' cycle by investing in a lightweight internal platform for developer workflows. The conversation digs into the decision framework: when to build, when...

Episode 51 of Tech Leadership with Fexingo: Lucas and Luna explore a surprising tool for breaking down information silos in engineering teams: internal podcasts. They dive into the case of a CTO at a 300-person fintech who launched a weekly 15-minute internal show where senior engineers explain one architecture decision, outage, or new pattern. The result? Cross-team awareness improved, onboarding...

Lucas and Luna dive into the hidden signals buried in your version control history. Instead of code reviews or metrics dashboards, your team's collaboration patterns — merging frequency, PR sizes, commit message quality — reveal whether your engineering culture is healthy or silently failing. They examine a real case: a mid-stage startup whose weekly git log exposed a bottleneck in the deployment...

Episode 49 of Tech Leadership with Fexingo explores architecture fitness functions—automated guardrails that catch architectural drift before it becomes tech debt. Lucas and Luna break down a real example from a mid-stage fintech that used fitness functions to enforce its hexagonal architecture boundaries. They discuss how one CTO defined rules around layer violations, dependency direction, and cy...

Lucas and Luna dive into a real-world story from a mid-sized SaaS company where the CTO used observability data — not intuition — to locate a subtle memory leak that was silently inflating their cloud bill by $40,000 a month. They walk through the specific signals: a gradual tail-latency creep, a steady rise in container restarts, and a single anomalous metric in their Prometheus dashboard that ev...

Episode 47 of Tech Leadership with Fexingo explores how a CTO at a mid-size SaaS company abandoned two-week sprints in favor of flow-based planning. Lucas and Luna dig into the concrete numbers: cycle times dropped from 12 days to under 3, throughput rose by 60 percent, and developer satisfaction scores hit an all-time high. They discuss the key mechanics—limiting work in progress, using explicit...

In this episode, Lucas and Luna dive into Uber's self-driving car program, a project that burned through over $2.5 billion before being sold off in 2020. They explore why even a company with seemingly unlimited resources failed to deliver autonomous vehicles, the strategic mistakes that doomed the project, and three concrete lessons for CTOs and engineering leaders about moonshot investments, orga...

In Episode 45 of Tech Leadership with Fexingo, hosts Lucas and Luna explore a specific organizational shift that one CTO at a mid-sized fintech company made to double developer throughput without adding headcount. The episode dives into the decision to create three dedicated platform teams—API gateway, data pipeline, and CI/CD—and how that restructuring reduced cognitive load for product teams fro...

Lucas and Luna explore how architecture decision records (ADRs) help engineering teams avoid accumulating tech debt. They walk through a real case from a mid-stage fintech company that adopted ADRs after a costly database migration failure. The episode covers what an ADR looks like, why lightweight templates beat heavyweight documentation, and how one CTO used ADRs to shave two months off a major...

Lucas and Luna explore how a CTO at a 200-person fintech company scrapped annual performance reviews in favor of continuous feedback loops. They break down the specific system the company adopted: weekly lightweight check-ins, a shared document for tracking growth areas, and a quarterly calibration meeting that replaced the dreaded stack ranking. The conversation digs into the metrics that improve...

In this episode of Tech Leadership with Fexingo, Lucas and Luna dissect a real-world case of a death march project that nearly destroyed a team at a mid-size SaaS company. They walk through the warning signs—crunch mode lasting more than two sprints, diminishing returns on overtime, and silenced dissent—and then discuss the intervention that reversed it: a radical scope-shedding exercise called 't...

In this episode, Lucas and Luna explore how one CTO transformed her engineering team's approach to incidents by institutionalizing blameless postmortems. They discuss a specific case where a major payment outage led not to finger-pointing but to systemic fixes, reducing similar incidents by 60 percent over six months. The hosts unpack the five-part postmortem template that the CTO introduced, the...

Lucas and Luna dissect the Technical Decision Record (TDR) — a lightweight practice that captures the rationale behind tough engineering choices. They walk through a real case where a CTO's team avoided repeating a costly database migration mistake by documenting their reasoning. The episode covers what makes a good TDR (title, context, decision, consequences), how it differs from RFCs and ADRs, a...

In this episode of Tech Leadership, Lucas and Luna explore a surprising diagnostic tool for organizational design: the code review. Drawing on a real case from a 200-engineer company that was struggling with slow feature velocity, Lucas explains how a new CTO analyzed pull request patterns to uncover hidden team coupling, misaligned incentives, and unclear ownership. They walk through specific sig...

Episode 38 of Tech Leadership with Fexingo. Lucas and Luna explore how a real CTO saved forty percent on cloud bills by replacing reserved instances with convertible commitments and usage forecasting. They walk through the actual math: moving from a one-year fixed reservation to a dynamic portfolio of convertible RIs and Savings Plans, using a rolling forecast of compute demand. Lucas explains the...

In this episode of Tech Leadership with Fexingo, Lucas and Luna explore a radical shift in on-call philosophy. They examine how one CTO at a mid-sized SaaS company transformed on-call from a dreaded rotation into a structured learning and ownership tool. The key insight: rotating developers through a dedicated 'incident triage' role for two-week sprints, paired with a strict no-escalation policy u...

Lucas and Luna dive into a radical shift in team communication: one CTO at a 40-person SaaS company replaced daily standup meetings with an asynchronous status board. They break down the specific problems the old standups caused — context switching, status-as-theatre, and the 15-minute meeting that actually took 45 — and how a simple shared document changed everything. The episode walks through th...

Episode 35 of Tech Leadership with Fexingo. Lucas and Luna dive into a counterintuitive cost-saving strategy: instead of optimizing infrastructure, a mid-stage startup eliminated cloud waste by killing zombie workloads and enforcing tagging governance. They walk through how a $400,000 annual savings was found by simply turning off forgotten resources and tagging everything else. Along the way they...

In this episode of Tech Leadership with Fexingo, Lucas and Luna explore how asynchronous communication can dramatically reduce cognitive load for engineering teams. They dive into a real-world case from a mid-sized SaaS company that adopted an 'async-first' policy—slashing meeting hours by 40% and boosting deep work time. The hosts dissect the specific tactics used: structured written updates, dec...

Most engineering teams write RFCs (Request for Comments) behind closed doors. In this episode, Lucas and Luna explore why publishing RFCs to the entire company — not just the engineering org — can catch architectural blind spots early, reduce rework, and build institutional knowledge. They dig into a case where a database migration proposal caught a critical data compliance issue because someone i...

In Episode 32 of Tech Leadership with Fexingo, Lucas and Luna dive into the practice of decision logs—a lightweight documentation technique that helps engineering teams avoid repeating costly mistakes. Lucas shares a concrete example from a mid-stage startup that used decision logs to cut recurring incidents by 60 percent over six months. They discuss how to start a decision log, what to include (...

Lucas and Luna explore the concept of a decision log — a lightweight practice where engineering leaders document every major technical decision, including the context, alternatives considered, and the actual outcome. Lucas shares a case from a mid-stage fintech where a CTO introduced a decision log after the team accidentally rebuilt a data pipeline three times in eighteen months because nobody re...

Episode 30 of Tech Leadership with Fexingo dives into the hardest infrastructure decision a CTO can face: when to migrate off a database that's been running in production for years. Lucas and Luna unpack the story of a mid-stage SaaS company that switched from MongoDB to PostgreSQL after three years of accumulating workarounds, query timeouts, and data inconsistency bugs. They walk through the tec...