Sofia Tikkanen
Profile
Senior engineering manager with 4 years of management on top of 8 years of backend engineering. Runs the merchant-platform group at a Series C SaaS — 3 squads, 12 engineers + 2 TLs. Hired 8 of the 12 over 14 months; post-hire 18-month retention at 100%. Team shipped 14 features across 4 quarters with 13 on-time. IC background: 7 years backend at Stripe (staff-IC); transitioned IC → EM in 2020.
Skills
Experience
Series C SaaS. Run the merchant-platform group end-to-end — 3 squads, 12 engineers + 2 TLs. Partner with 3 PMs, 2 designers, and the head of analytics.
- Hired 8 engineers across 4 levels (2 staff, 4 senior, 2 mid) over 14 months; time-to-fill 38 days; post-hire 18-month retention at 100%.
- Promoted 4 engineers through the period (1 senior→staff, 2 mid→senior, 1 entry→mid); 3 of 4 on first eligibility. Authored the team's promo packet template adopted across 3 product orgs.
- Lifted team DORA metrics: deploy frequency 2×/week → daily; lead time 8 days → 18 hours; change-failure rate 22% → 7%. Shift came from trunk-based + feature flags + automated rollback.
- Team shipped 14 features across 4 quarters with 13 on-time. The one slip surfaced a planning-process gap I rebuilt the next quarter, returning the team to 100% on-time through 2024.
- Voluntary attrition on the team was 0 in 2024 vs 14% company-wide; in 2023 it was 8% vs 11% company-wide. Both periods covered surgical reorganization work.
- Authored the team's interview rubric (3 rounds: coding, system design, behavioral); rubric was adopted across 3 product orgs; interview-loop completion time fell from 28 to 9 days.
- Led the senior-track calibration session for the 6-team engineering org (28 engineers reviewed); designed the calibration template that reduced session time from 4 hours to 90 minutes.
- Ran a 4-week PIP for a senior IC ending in a clean managed-out; post-event 6-month team attrition was zero. Documented the playbook for the EM peer group.
- Owned the SEPA Instant integration; €2.3B volume processed across 4,800 merchants post-launch.
- Promoted L4 → L5 → Staff in 30 months.
Speaking & Publications
• LeadDev London 2024 speaker — 'Hiring 8 engineers in 14 months without breaking the bar' (35-min talk). • Published in IEEE Software, Sept 2024 — 'Calibration as a calibration problem.' • Tech-management blog at tikkanen.dev (3,200 monthly readers).